JP6972380B2 - Refrigeration cycle device - Google Patents

Description

The present invention relates to a refrigeration cycle device for suppressing leakage of a refrigerant.

Depending on the refrigerant used, the refrigerating cycle device needs to prevent the refrigerant from leaking to the outside of the refrigerating cycle device. For example, in recent years, in Europe, the movement to regulate the emission of F gas has been strengthened. In Europe, HFCs (hydrofluorocarbons), PFCs (perfluorocarbons), and SF6 (sulfur hexafluoride) are called F gases. For this reason, in recent years, in an air conditioner, which is an example of a refrigeration cycle device, a flammable refrigerant such as an R32 refrigerant having a warming coefficient smaller than that of R410A is used instead of the nonflammable refrigerant R410A refrigerant which is a kind of HFC refrigerant. May be used.

When the above-mentioned flammable refrigerant is used, it is necessary to prevent the refrigerant from leaking into the living space from the viewpoint of safety and the like. Therefore, a conventional air conditioner provided with a detection sensor for detecting the leakage of the refrigerant into the living space and a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit has been proposed (patented). See Document 1). Specifically, the conventional air conditioner includes an outdoor unit, a plurality of indoor units that are user-side units, and a plurality of relay units that connect the outdoor unit and the indoor unit. Further, in the conventional air conditioner, the indoor unit is provided with a detection sensor for detecting the leakage of the refrigerant. Further, in the conventional air conditioner, the relay unit is provided with a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit. Then, in the conventional air conditioner, when the leakage of the refrigerant into the living space is detected by the detection sensor, the shutoff valve of the relay unit shuts off the circulation of the refrigerant in the refrigeration cycle circuit, and the refrigerant leaks into the living space. It suppresses that.

Japanese Unexamined Patent Publication No. 2018-77040

The relay unit is installed in the space around the living space in the building, for example, in the attic. Therefore, it may not be possible to secure the installation space for the relay unit in the building. Further, even if the installation space of the relay unit can be secured in the building, it is difficult to secure a large installation space of the relay unit, and the shutoff valve may not be provided in the relay unit. As described above, the conventional refrigeration cycle apparatus has a problem that it is difficult to install a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a refrigeration cycle apparatus in which installation of a shutoff valve for shutting off the circulation of a refrigerant in a refrigeration cycle circuit is easier than before. ..

The refrigerating cycle apparatus according to the present invention has a plurality of constituent devices, and includes a refrigerating cycle circuit configured by connecting the plurality of the constituent devices with a refrigerant pipe and a part of the plurality of the constituent devices. A refrigerating cycle device including an outdoor unit having a housing and a utilization-side unit in which a part of the plurality of constituent devices is housed, wherein the outdoor unit is housed in the housing. Of the refrigerant pipes connecting the constituent equipment and the constituent equipment accommodated in the user-side unit, the refrigerant pipe through which the gaseous refrigerant or the refrigerant in the supercritical state flows is set as the first refrigerant pipe, and the outdoor unit is said to have the same. Of the refrigerant pipes connecting the constituent equipment housed in the housing and the constituent equipment housed in the user-side unit, the refrigerant pipe through which the liquid refrigerant or the refrigerant in the gas-liquid two-phase state flows is the second refrigerant. In the case of a pipe, a detection sensor for detecting the refrigerant leaked from the refrigeration cycle circuit, a first shutoff valve provided in the middle of the first refrigerant pipe, and a middle part of the second refrigerant pipe are provided. When the amount of the refrigerant detected by the second shutoff valve and the detection sensor exceeds the specified amount, the first shutoff valve is closed to shut off the flow of the refrigerant in the first refrigerant pipe. A control device that closes the second shutoff valve to shut off the flow of the refrigerant in the second refrigerant pipe, the first shutoff valve, and the second shutoff valve are housed and arranged outside the housing of the outdoor unit. It is provided with a storage box that is attached to the housing.

The installation space for the outdoor unit is larger and easier to secure than the installation space for the relay unit. Therefore, in the refrigerating cycle apparatus according to the present invention, it becomes easier to install the first shutoff valve and the second shutoff valve, which are shutoff valves for shutting off the circulation of the refrigerant in the refrigeration cycle circuit.

It is a refrigerant circuit diagram which shows the refrigerating cycle apparatus which concerns on embodiment of this invention. It is a perspective view which shows the refrigerating cycle apparatus which concerns on embodiment of this invention. It is a perspective view which shows the inside of the storage box of the refrigerating cycle apparatus which concerns on embodiment of this invention. It is a perspective view which shows another example of the refrigeration cycle apparatus which concerns on embodiment of this invention. It is a perspective view which shows another example of the refrigeration cycle apparatus which concerns on embodiment of this invention.

In the following embodiment, an example of the refrigeration cycle apparatus according to the present invention will be described. In the following embodiments, an example in which the refrigeration cycle apparatus according to the present invention is used as an air conditioner will be described.

Embodiment.
FIG. 1 is a refrigerant circuit diagram showing a refrigeration cycle apparatus according to an embodiment of the present invention.
The refrigeration cycle device 1 according to the present embodiment includes a refrigeration cycle circuit 10 in which a refrigerant circulates. The refrigeration cycle circuit 10 has a plurality of constituent devices, and these plurality of constituent devices are connected by a refrigerant pipe. In the present embodiment, the refrigeration cycle circuit 10 is an example of a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, an expansion valve 14, and a user-side heat exchanger as constituent devices of the refrigeration cycle circuit 10. The indoor heat exchanger 15 is provided.

The compressor 11 compresses the sucked low-pressure gaseous refrigerant and discharges it as a high-pressure gaseous refrigerant. Depending on the refrigerant circulating in the refrigeration cycle circuit 10, there is also a refrigerant discharged from the compressor 11 as a refrigerant in a supercritical state, such as a carbon dioxide refrigerant. The four-way valve 12 is a valve that switches the flow of the refrigerant between the cooling operation and the heating operation. As will be described later, in the present embodiment, the indoor heat exchanger 15, which is the user-side heat exchanger, functions as a radiator during the heating operation and as an evaporator during the cooling operation. Therefore, the refrigeration cycle circuit 10 includes a four-way valve 12. However, the refrigeration cycle circuit 10 may not include the four-way valve 12 if the utilization heat exchanger only needs to function as either a radiator or an evaporator.

The outdoor heat exchanger 13 exchanges heat between the refrigerant and the outdoor air. The outdoor heat exchanger 13 functions as an evaporator during the heating operation, and evaporates and vaporizes the refrigerant. Further, the outdoor heat exchanger 13 functions as a radiator during the cooling operation and dissipates heat from the refrigerant to liquefy the refrigerant. In the present embodiment, in order to promote heat exchange between the refrigerant flowing through the outdoor heat exchanger 13 and the outdoor air, the outdoor air is supplied to the outdoor heat exchanger 13 around the outdoor heat exchanger 13. A blower 13a is provided.

The expansion valve 14 is, for example, a throttle device or the like, and decompresses the refrigerant to expand it. The indoor heat exchanger 15 exchanges heat between the air in the room, which is the space to be air-conditioned, and the refrigerant. The indoor heat exchanger 15 functions as a radiator during the heating operation, dissipates heat from the refrigerant, and liquefies the refrigerant. Further, the indoor heat exchanger 15 functions as an evaporator during the cooling operation, and evaporates and vaporizes the refrigerant. In the present embodiment, in order to promote heat exchange between the refrigerant flowing through the indoor heat exchanger 15 and the indoor air, the indoor heat exchanger 15 is supplied with the indoor air around the indoor heat exchanger 15. A blower 15a is provided.

The constituent equipment of the refrigeration cycle circuit 10 is housed in the outdoor unit 2 or the indoor unit 3 which is an example of the user-side unit. When the outdoor unit 2 and the indoor unit 3 are connected via the relay unit, a part of the constituent equipment of the refrigeration cycle circuit 10 may be accommodated in the relay unit. That is, a part of the constituent equipment of the refrigeration cycle circuit 10 is housed in the outdoor unit 2. Further, a part of the constituent equipment of the refrigeration cycle circuit 10 is housed in the indoor unit 3.

Specifically, in the case of the present embodiment, the outdoor unit 2 includes a housing 70. The housing 70 houses a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, and an expansion valve 14. Further, the indoor unit 3 houses the indoor heat exchanger 15. The types of the components of the refrigeration cycle circuit 10 housed in the housing 70 of the outdoor unit 2 and the indoor unit 3 are merely examples. For example, the expansion valve 14 may be housed in the indoor unit 3.

Further, the refrigerating cycle device 1 according to the present embodiment has a detection sensor 4, a first shutoff valve 20, and a second shutoff for detecting the leak of the refrigerant in order to suppress the leakage of the refrigerant into the room which is the air conditioning target space. It includes a valve 30 and a control device 50.

The detection sensor 4 is a sensor that detects the refrigerant leaked from the refrigeration cycle circuit 10. In the present embodiment, the detection sensor 4 is housed in the indoor unit 3 and detects the amount of the refrigerant contained in the indoor air taken into the indoor unit 3. If the amount of the refrigerant contained in the indoor air can be detected, the installation location of the detection sensor 4 is not limited to the indoor unit 3. For example, the detection sensor 4 may be provided at a location outside the indoor unit 3 and inside the room. Further, the type of the detection sensor 4 is not particularly limited, and various known sensors used for detecting the refrigerant in the air can be adopted as the detection sensor 4 depending on the refrigerant used.

The first shutoff valve 20 and the second shutoff valve 30 shut off the circulation of the refrigerant in the refrigeration cycle circuit 10. The constituent equipment of the refrigerating cycle circuit 10 housed in the housing 70 of the outdoor unit 2 and the constituent equipment of the refrigerating cycle circuit 10 housed in the indoor unit 3 are connected by the first refrigerant pipe 41 and the second refrigerant pipe 42. Has been done. The first refrigerant pipe 41 is a refrigerant pipe through which a gaseous refrigerant or a refrigerant in a supercritical state flows. In the case of this embodiment, the connection pipe connecting the four-way valve 12 and the indoor heat exchanger 15 is the first refrigerant pipe 41. The second refrigerant pipe 42 is a refrigerant pipe through which a liquid refrigerant or a gas-liquid two-phase state refrigerant flows. In the case of this embodiment, the pipe connecting the expansion valve 14 and the indoor heat exchanger 15 is the second refrigerant pipe 42. The first shutoff valve 20 is provided in the middle of the first refrigerant pipe 41. Further, the second shutoff valve 30 is provided in the middle of the second refrigerant pipe 42.

That is, by closing the first shutoff valve 20, the flow of the refrigerant in the first refrigerant pipe 41 can be shut off. Further, by closing the second shutoff valve 30, the flow of the refrigerant in the second refrigerant pipe 42 can be shut off. Here, the liquid refrigerant or the gas-liquid two-phase state refrigerant flowing through the second refrigerant pipe 42 passes through the second shutoff valve 30. Further, the gaseous refrigerant flowing through the first refrigerant pipe 41 or the refrigerant in the supercritical state passes through the first shutoff valve 20. Therefore, when the mass flow rate of the refrigerant passing through the second shutoff valve 30 and the mass flow rate of the refrigerant passing through the first shutoff valve 20 are to be made equal to each other, the refrigerant formed in the second shutoff valve 30 passes through. The cross-sectional area of the flow path can be made smaller than the cross-sectional area of the flow path through which the refrigerant formed in the first shutoff valve 20 passes. Therefore, in the present embodiment, the cross-sectional area of the flow path through which the refrigerant formed in the second shutoff valve 30 passes is smaller than the cross-sectional area of the flow path through which the refrigerant formed in the first shutoff valve 20 passes. ing. As a result, the second shutoff valve 30 is cheaper than the first shutoff valve 20. Therefore, the manufacturing cost of the refrigeration cycle device 1 can be reduced.

Further, the degree of sealing required for the mechanism for blocking the flow of the liquid refrigerant or the gas-liquid two-phase state refrigerant is lower than the degree of sealing required for the mechanism for blocking the flow of the gaseous refrigerant or the supercritical refrigerant. Therefore, in the present embodiment, the degree of sealing of the second shutoff valve 30 when the second shutoff valve 30 is closed is that of the first shutoff valve 20 when the first shutoff valve 20 is closed. It is lower than the degree of sealing. As a result, the second shutoff valve 30 is cheaper than the first shutoff valve 20. Therefore, the manufacturing cost of the refrigeration cycle device 1 can be reduced.

In the following, the portion of the first refrigerant pipe 41 that connects the constituent equipment of the refrigeration cycle circuit 10 housed in the housing 70 of the outdoor unit 2 and the first shutoff valve 20 is referred to as the third refrigerant pipe 43. do. The portion of the first refrigerant pipe 41 that connects the constituent equipment of the refrigeration cycle circuit 10 housed in the indoor unit 3 and the first shutoff valve 20 is referred to as the fourth refrigerant pipe 44. The portion of the second refrigerant pipe 42 that connects the constituent equipment of the refrigeration cycle circuit 10 housed in the housing 70 of the outdoor unit 2 and the second shutoff valve 30 is referred to as the fifth refrigerant pipe 45. The portion of the second refrigerant pipe 42 that connects the constituent equipment of the refrigeration cycle circuit 10 housed in the indoor unit 3 and the second shutoff valve 30 is referred to as the sixth refrigerant pipe 46.

Further, in the following, the connection portion between the first shutoff valve 20 and the third refrigerant pipe 43 will be referred to as a first connection portion 23. In the present embodiment, the first shutoff valve 20 has a connection pipe 21, and the third refrigerant pipe 43 is connected to the end of the connection pipe 21. Therefore, in the present embodiment, the end portion of the connection pipe 21 is the first connection portion 23. Further, the connection portion between the first shutoff valve 20 and the fourth refrigerant pipe 44 is referred to as a second connection portion 24. In the present embodiment, the first shutoff valve 20 has a connection pipe 22, and the fourth refrigerant pipe 44 is connected to the end of the connection pipe 22. Therefore, in the present embodiment, the end portion of the connection pipe 22 is the second connection portion 24. Further, the connection portion between the second shutoff valve 30 and the fifth refrigerant pipe 45 is referred to as a third connection portion 33. In the present embodiment, the second shutoff valve 30 has a connection pipe 31, and the fifth refrigerant pipe 45 is connected to the end of the connection pipe 31. Therefore, in the present embodiment, the end portion of the connection pipe 31 is the third connection portion 33. Further, the connection portion between the second shutoff valve 30 and the sixth refrigerant pipe 46 is referred to as a fourth connection portion 34. In the present embodiment, the second shutoff valve 30 has a connection pipe 32, and the sixth refrigerant pipe 46 is connected to the end of the connection pipe 32. Therefore, in the present embodiment, the end portion of the connection pipe 32 is the fourth connection portion 34.

The control device 50 has the rotation speed when the compressor 11 is driven, the flow path of the four-way valve 12, the opening degree of the expansion valve 14, the rotation speed of the outdoor blower 13a, the rotation speed of the indoor blower 15a, and the opening / closing of the first shutoff valve 20. , And control such as opening and closing of the second shutoff valve 30. The control device 50 is composed of dedicated hardware or a CPU (Central Processing Unit) that executes a program stored in a memory. The CPU is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a processor.

When the control device 50 is dedicated hardware, the control device 50 may be, for example, a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. Applicable. Each of the functional units realized by the control device 50 may be realized by individual hardware, or each functional unit may be realized by one hardware.

When the control device 50 is a CPU, each function executed by the control device 50 is realized by software, firmware, or a combination of software and firmware. Software and firmware are written as programs and stored in memory. The CPU realizes each function of the control device 50 by reading and executing a program stored in the memory. Here, the memory is a non-volatile or volatile semiconductor memory such as, for example, RAM, ROM, flash memory, EPROM, or EEPROM.

Some of the functions of the control device 50 may be realized by dedicated hardware, and some may be realized by software or firmware. Further, in the present embodiment, the control device 50 is configured as one control device and housed in the outdoor unit 2, but the control device 50 may be divided into a plurality of control devices. Then, the control device for controlling the constituent devices housed in the indoor unit 3 may be housed in the indoor unit 3.

The control device 50 according to the present embodiment includes a receiving unit 51, a comparison unit 52, and a control unit 53 as functional units for controlling the first shutoff valve 20 and the second shutoff valve 30. The receiving unit 51 is a functional unit that receives the detection result of the detection sensor 4. In other words, the receiving unit 51 receives from the refrigerating cycle circuit 10 how much refrigerant has leaked into the air in the room which is the air-conditioned space. In this embodiment, the control device 50 and the detection sensor 4 are connected by wiring 61. Then, the receiving unit 51 receives the detection result of the detection sensor 4 via the wiring 61. That is, the wiring 61 includes a communication line. The wiring 61 may include a power supply line that supplies power to the detection sensor 4.

The comparison unit 52 is a functional unit that compares the detected amount of the refrigerant detected by the detection sensor 4 with the specified amount which is a threshold value. In other words, the comparison unit 52 is a functional unit that compares the detection value of the detection sensor 4 with the specified amount that is the threshold value. The control unit 53 is a functional unit that closes the first shutoff valve 20 and the second shutoff valve 30 when the detected amount of the refrigerant detected by the detection sensor 4 exceeds a specified amount. By closing the first shutoff valve 20, the flow of the refrigerant in the first refrigerant pipe 41 can be shut off. Further, by closing the second shutoff valve 30, the flow of the refrigerant in the second refrigerant pipe 42 can be shut off. That is, by closing the first shutoff valve 20 and the second shutoff valve 30, the circulation of the refrigerant in the refrigeration cycle circuit 10 can be shut off.

In the present embodiment, the control device 50 and the first shutoff valve 20 are connected by a wiring 62. Then, the control unit 53 issues an opening / closing command to the first shutoff valve 20 via the wiring 62. That is, the wiring 62 includes a communication line. The wiring 62 may include a power supply line for supplying power to the first shutoff valve 20. Further, in the present embodiment, the control device 50 and the second shutoff valve 30 are connected by a wiring 63. Then, the control unit 53 issues an opening / closing command to the second shutoff valve 30 via the wiring 63. That is, the wiring 63 includes a communication line. The wiring 63 may be provided with a power supply line for supplying power to the second shutoff valve 30.

Here, in the conventional refrigeration cycle apparatus provided with a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit, the shutoff valve is provided in the relay unit as described above. Therefore, in the conventional refrigeration cycle device provided with a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit, it is necessary to provide a control device such as a control board for controlling the shutoff valve in the relay unit. Therefore, in the conventional refrigeration cycle device provided with a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit, it is necessary to newly provide a control device such as a control board for controlling the shutoff valve, and the manufacturing cost of the refrigeration cycle device is high. There was a problem that the number increased.

On the other hand, as will be described later, in the refrigerating cycle device 1 according to the present embodiment, the first shutoff valve 20 and the second shutoff valve 30 are provided in the vicinity of the outdoor unit 2. Therefore, in the refrigeration cycle device 1 according to the present embodiment, the first shutoff valve 20 and the second shutoff valve 30 are controlled by the control device 50 provided in the outdoor unit 2. Usually, the outdoor unit is provided with a control device. Therefore, in the refrigeration cycle device 1 according to the present embodiment, it is not necessary to newly provide a control device for controlling the first shutoff valve 20 and the second shutoff valve 30. Therefore, the refrigerating cycle apparatus 1 according to the present embodiment can reduce the manufacturing cost as compared with the conventional refrigerating cycle apparatus provided with a shutoff valve for shutting off the circulation of the refrigerant in the refrigerating cycle circuit.

FIG. 2 is a perspective view showing a refrigeration cycle apparatus according to an embodiment of the present invention. Further, FIG. 3 is a perspective view showing the inside of the storage box of the refrigeration cycle apparatus according to the embodiment of the present invention. In other words, FIG. 3 is a view showing a part of the outer peripheral surface of the storage box 80. The white arrows shown in FIG. 2 indicate the flow direction of the air blown out to the outside of the housing 70. Hereinafter, the details of the installation configuration of the first shutoff valve 20 and the second shutoff valve 30 will be described with reference to FIGS. 2 and 3.

An air outlet (not shown) is formed on the front surface portion 71 of the housing 70 of the outdoor unit 2. The outdoor air sucked into the housing 70 from a suction port (not shown) by the outdoor blower 13a exchanges heat with the refrigerant flowing through the outdoor heat exchanger 13. As shown by the white arrows in FIG. 2, the outdoor air that has exchanged heat with the refrigerant flowing through the outdoor heat exchanger 13 is blown out of the housing 70 from the outlet formed in the front surface portion 71. Further, a storage box 80 is provided on the back surface portion 73 of the housing 70. Specifically, the storage box 80 is arranged outside the housing 70 and attached to the back surface portion 73 of the housing 70. In other words, the housing 70 includes a mounting portion 74 to which the storage box 80 is mounted on the back surface portion 73. The method of fixing the storage box 80 to the housing 70 is not particularly limited. For example, the storage box 80 may be fixed to the housing 70 by screwing, or the storage box 80 may be fixed to the housing 70 by welding.

As shown in FIG. 3, the storage box 80 houses the first shutoff valve 20 and the second shutoff valve 30. As described above, the first shutoff valve 20 is connected to the third refrigerant pipe 43 and the fourth refrigerant pipe 44, and the second shutoff valve 30 is connected to the fifth refrigerant pipe 45 and the sixth refrigerant pipe 46. Here, in the present embodiment, the first connection portion 23 which is the connection portion between the first shutoff valve 20 and the third refrigerant pipe 43, and the connection portion between the first shutoff valve 20 and the fourth refrigerant pipe 44. 2 connection portion 24, a third connection portion 33 which is a connection portion between the second shutoff valve 30 and the fifth refrigerant pipe 45, and a fourth connection portion which is a connection portion between the second shutoff valve 30 and the sixth refrigerant pipe 46. 34 is provided outside the storage box 80. By arranging the first connection portion 23 and the second connection portion 24 outside the storage box 80, the third refrigerant pipe 43 and the fourth refrigerant pipe 44 are connected to the first shutoff valve 20 when the refrigeration cycle device 1 is installed. At that time, the connection work becomes easy. Further, by arranging the third connection portion 33 and the fourth connection portion 34 outside the storage box 80, the fifth refrigerant pipe 45 and the sixth refrigerant pipe 46 are connected to the second shutoff valve 30 when the refrigeration cycle device 1 is installed. When connecting, the connection work becomes easy.

An opening 75 is formed in the back surface 73 of the housing 70. Specifically, a knockout hole is formed in the back surface portion 73 of the housing 70. The knockout hole is a structure in which the opening is closed with a lid so that the opening can be easily opened in the field. The opening can be opened by pushing the lid of the knockout hole. In the present embodiment, the opening 75 is formed by pushing the lid of the knockout hole of the back surface portion 73 of the housing 70. Then, the constituent equipment of the refrigerating cycle circuit 10 housed in the housing 70 of the outdoor unit 2 and the first shutoff valve 20 are connected to each other through the third refrigerant pipe 43 through the opening 75. Further, the constituent equipment of the refrigerating cycle circuit 10 housed in the housing 70 of the outdoor unit 2 and the second shutoff valve 30 are connected to each other through the fifth refrigerant pipe 45 through the opening 75. Further, the control device 50 housed in the housing 70 of the outdoor unit 2 and the detection sensor 4 are connected to each other through the wiring 61 through the opening 75. Further, the control device 50 housed in the housing 70 of the outdoor unit 2 and the first shutoff valve 20 are connected to each other through the wiring 62 through the opening 75. Further, the control device 50 housed in the housing 70 of the outdoor unit 2 and the second shutoff valve 30 are connected to each other through the wiring 63 through the opening 75.

Here, by adopting the temporary fixing structure as shown in FIG. 4 below for the refrigerating cycle device 1, the storage box 80 can be easily fixed to the housing 70.

FIG. 4 is a perspective view showing another example of the refrigeration cycle apparatus according to the embodiment of the present invention.
In the refrigerating cycle device 1 shown in FIG. 4, the storage box 80 is provided with a hooking portion 81 on the surface of the outdoor unit 2 facing the housing 70. The hook portion 81 is, for example, a hook. Further, the housing 70 of the outdoor unit 2 is provided with a hooking portion 77 on which the hooking portion 81 is hooked on the mounting portion 74. In this embodiment, a plate-shaped member is attached to the attachment portion 74. At this time, the plate-shaped member is attached so as to form a space in which the tip end portion of the hook portion 81 is inserted between the plate-shaped member and the housing 70. By attaching the plate-shaped member in this way, the upper edge portion of the plate-shaped member becomes the hooking portion 77.

By hooking the hooking portion 81 of the housing box 80 to the hooking portion 77 of the housing 70, the storage box 80 is temporarily fixed at the mounting position of the housing 70. By fixing the storage box 80 to the housing 70 in a state where the storage box 80 is temporarily fixed to the mounting position of the housing 70 in this way, the storage box 80 can be easily fixed to the housing 70, and the housing can be easily fixed to the housing 70. The time for fixing the storage box 80 to the 70 can be shortened. For example, when the storage box 80 is fixed to the housing 70 by screwing, the operator will perform the screwing work while holding the driver in one hand. At this time, since the operator does not need to hold the storage box 80 at the mounting position, the screwing work becomes easy and the time for the screwing work can be shortened.

Further, the fixing position of the storage box 80 to the housing 70 described above is an example. The storage box 80 may be fixed to the housing 70 outside the housing 70. For example, the storage box 80 may be fixed at the position shown in FIG. 5 below.

FIG. 5 is a perspective view showing another example of the refrigeration cycle apparatus according to the embodiment of the present invention.
In the refrigeration cycle device 1 shown in FIG. 5, the storage box 80 is arranged outside the housing 70 and attached to the side surface portion 72 of the housing 70. In other words, the housing 70 includes a mounting portion 74 to which the storage box 80 is mounted on the side surface portion 72. Further, in the refrigerating cycle device 1 shown in FIG. 5, an opening 76 through which the third refrigerant pipe 43, the fifth refrigerant pipe 45, the wiring 61, the wiring 62, and the wiring 63 pass is formed on the side surface portion 72 of the housing 70. ing. Specifically, a knockout hole serving as an opening 76 is formed in the side surface portion 72 of the housing 70. The opening 76 is formed by pushing the lid of the knockout hole of the side surface portion 72 of the housing 70.

Depending on the installation location of the outdoor unit 2, it may be difficult to secure the installation space for the storage box 80 on the back side of the housing 70. In such an installation environment, by configuring the refrigeration cycle device 1 as shown in FIG. 5, the storage box 80 can be easily installed, and the first shutoff valve 20 and the second shutoff valve 30 can be easily installed.

In addition, a mounting portion 74 to which the storage box 80 is mounted may be provided on both the side surface portion 72 and the back surface portion 73 of the housing 70. With this configuration, it is possible to select which side of the side surface portion 72 and the back surface portion 73 to fix the storage box 80 according to the installation location of the outdoor unit 2, and the first shutoff valve 20 can be selected. And the installation of the second shutoff valve 30 becomes easier.

As described above, the refrigerating cycle device 1 according to the present embodiment is a part of the refrigerating cycle circuit 10 in which a plurality of constituent devices are connected by a refrigerant pipe and the plurality of constituent devices constituting the refrigerating cycle circuit 10. It includes an outdoor unit 2 having a housing 70 in which the refrigerator is housed, and an indoor unit 3 in which a part of a plurality of constituent devices constituting the refrigeration cycle circuit 10 is housed. Further, the refrigerating cycle device 1 according to the present embodiment includes a detection sensor 4 for detecting the refrigerant leaked from the refrigerating cycle circuit 10, a first shutoff valve 20 provided in the middle of the first refrigerant pipe 41, and a first. 2 A second shutoff valve 30 provided in the middle of the refrigerant pipe 42 and a control device 50 are provided. When the detection amount of the refrigerant detected by the detection sensor 4 exceeds the specified amount, the control device 50 closes the first shutoff valve 20 to shut off the flow of the refrigerant in the first refrigerant pipe 41, and the second The shutoff valve 30 is closed to shut off the flow of the refrigerant in the second refrigerant pipe 42. The refrigerating cycle device 1 according to the present embodiment accommodates the first shutoff valve 20 and the second shutoff valve 30, and is arranged outside the housing 70 of the outdoor unit 2 and attached to the housing 70. It is equipped with a box 80.

A conventional refrigeration cycle device equipped with a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit has a shutoff valve in the relay unit. The relay unit is installed in the space around the living space in the building, for example, in the attic. Therefore, it may not be possible to secure the installation space for the relay unit in the building. Further, even if the installation space of the relay unit can be secured in the building, it is difficult to secure a large installation space of the relay unit, and the shutoff valve may not be provided in the relay unit. As described above, the conventional refrigeration cycle apparatus has a problem that it is difficult to install a shutoff valve for shutting off the circulation of the refrigerant in the refrigeration cycle circuit. On the other hand, in the refrigerating cycle device 1 according to the present embodiment, the storage box 80 is fixed to the housing 70 of the outdoor unit 2, and the first shutoff valve 20 and the second shutoff valve 30 are housed in the storage box 80. .. The installation space of the outdoor unit 2 is larger and easier to secure than the installation space of the relay unit. Therefore, in the refrigeration cycle device 1 according to the present embodiment, it becomes easier to install the first shutoff valve 20 and the second shutoff valve 30, which are shutoff valves for shutting off the circulation of the refrigerant in the refrigeration cycle circuit. ..

Further, in the refrigerating cycle device 1 according to the present embodiment, a storage box 80 is provided outside the housing 70 of the outdoor unit 2, and the first shutoff valve 20 and the second shutoff valve 30 are housed in the storage box 80. There is. Therefore, when the first shutoff valve 20 and the second shutoff valve 30 are provided in the conventional refrigeration cycle device, it is necessary to secure the installation space for the first shutoff valve 20 and the second shutoff valve 30 inside the housing of the outdoor unit. There is no. Therefore, by providing the storage box 80, the first shutoff valve 20, and the second shutoff valve 30, the conventional refrigerating cycle device can be easily changed to the refrigerating cycle device 1 according to the present embodiment.

In the present embodiment, the refrigerating cycle device 1 is configured to include only one indoor unit 3. Not limited to this, the refrigerating cycle device 1 may be configured to include a plurality of indoor units 3. Further, for example, the refrigerating cycle device 1 may be configured such that the outdoor unit 2 and the indoor unit 3 are connected via a relay unit.

Further, in the present embodiment, an example in which the refrigeration cycle device 1 is used as an air conditioner has been described. In other words, in the present embodiment, an example in which the user-side unit of the refrigeration cycle device 1 is used as the indoor unit 3 has been described. Not limited to this, the refrigeration cycle device 1 can be various refrigeration cycle devices provided with a refrigeration cycle circuit. For example, the refrigerating cycle device 1 may be used as a refrigerating device in which the user-side unit of the freezing cycle device 1 is installed in the freezer and the air in the freezer is cooled by the user-side unit. Further, for example, water may be heated by the user side heat exchanger of the user side unit, and the refrigeration cycle device 1 may be used as the hot water supply device.

1 Refrigerant cycle device, 2 Outdoor unit, 3 Indoor unit, 4 Detection sensor, 10 Refrigerant cycle circuit, 11 Compressor, 12 Four-way valve, 13 Outdoor heat exchanger, 13a Outdoor blower, 14 Expansion valve, 15 Indoor heat exchanger, 15a Indoor blower, 20 1st shutoff valve, 21 connection pipe, 22 connection pipe, 23 1st connection part, 24 2nd connection part, 30 2nd shutoff valve, 31 connection pipe, 32 connection pipe, 33rd 3 connection part, 34 4th connection part, 41 1st refrigerant pipe, 42 2nd refrigerant pipe, 43 3rd refrigerant pipe, 44 4th refrigerant pipe, 45 5th refrigerant pipe, 46 6th refrigerant pipe, 50 control device, 51 Receiver, 52 Comparison, 53 Control, 61 Wiring, 62 Wiring, 63 Wiring, 70 Housing, 71 Front, 72 Side, 73 Back, 74 Mounting, 75 Opening, 76 Opening, 77 Hooking part, 80 storage box, 81 hooking part.

Claims (8)

A refrigeration cycle circuit having a plurality of components and having the plurality of components connected by a refrigerant pipe,
An outdoor unit having a housing in which a part of the plurality of constituent devices is housed, and
A user-side unit in which a part of the plurality of constituent devices is housed, and a user-side unit.
It is a refrigeration cycle device equipped with
Of the refrigerant pipes connecting the constituent equipment housed in the housing of the outdoor unit and the constituent equipment housed in the user-side unit, the refrigerant pipe through which a gaseous refrigerant or a refrigerant in a supercritical state flows. Is used as the first refrigerant pipe.
Of the refrigerant pipes connecting the constituent devices housed in the housing of the outdoor unit and the constituent devices housed in the user-side unit, the refrigerant in which a liquid refrigerant or a gas-liquid two-phase state refrigerant flows flows. When the pipe is the second refrigerant pipe,
A detection sensor that detects the refrigerant leaked from the refrigeration cycle circuit, and
A first shutoff valve provided in the middle of the first refrigerant pipe,
A second shutoff valve provided in the middle of the second refrigerant pipe,
When the amount of refrigerant detected by the detection sensor exceeds the specified amount, the first shutoff valve is closed to shut off the flow of the refrigerant in the first refrigerant pipe, and the second shutoff valve is closed. A control device that shuts off the flow of refrigerant in the second refrigerant pipe,
A storage box that houses the first shutoff valve and the second shutoff valve, is arranged outside the housing of the outdoor unit, and is attached to the housing.
Equipped with a refrigeration cycle device. The refrigerating cycle device according to claim 1, wherein the control device is housed in the outdoor unit. The portion of the first refrigerant pipe that connects the constituent equipment housed in the housing of the outdoor unit and the first shutoff valve is designated as the third refrigerant pipe.
The portion of the first refrigerant pipe that connects the constituent equipment housed in the user-side unit and the first shutoff valve is designated as the fourth refrigerant pipe.
Of the second refrigerant pipe, the portion connecting the constituent equipment housed in the housing of the outdoor unit and the second shutoff valve is designated as the fifth refrigerant pipe.
When the portion of the second refrigerant pipe that connects the constituent equipment housed in the user-side unit and the second shutoff valve is the sixth refrigerant pipe.
A first connection portion that is a connection portion between the first shutoff valve and the third refrigerant pipe, a second connection portion that is a connection portion between the first shutoff valve and the fourth refrigerant pipe, and the second shutoff valve. The third connection portion, which is a connection portion with the fifth refrigerant pipe, and the fourth connection portion, which is a connection portion between the second shutoff valve and the sixth refrigerant pipe, are provided outside the storage box. The refrigeration cycle apparatus according to claim 1 or 2. The refrigerating cycle device according to any one of claims 1 to 3, wherein the housing is provided with a mounting portion to which the storage box is mounted on both a side surface portion and a back surface portion. The refrigerating cycle device according to any one of claims 1 to 3, wherein the housing is provided with a mounting portion to which the storage box is mounted on a side surface portion or a back surface portion. The storage box is provided with a hook and has a hook.
The refrigerating cycle apparatus according to claim 4, wherein the housing is provided with a hooking portion on which the hooking portion is hooked. One of claims 1 to 6, wherein the cross-sectional area of the flow path through which the refrigerant formed in the second shutoff valve passes is smaller than the cross-sectional area of the flow path through which the refrigerant formed in the first shutoff valve passes. Refrigerant cycle device according to the section. Claims 1 to 7 that the degree of sealing of the second shutoff valve when the second shutoff valve is closed is lower than the degree of seal of the first shutoff valve when the first shutoff valve is closed. The refrigeration cycle apparatus according to any one of the above.

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