ES2935032T3 - refrigeration cycle device - Google Patents

Abstract

This refrigeration cycle device (10) has: a casing (40) that configures the outer contour of an outer machine (30), has a machine chamber (M) and a blow chamber (F) formed inside it, and it has an introduction hole (45) formed to introduce outside air into the machine chamber (M); a dividing plate (50) that divides the interior of the casing (40) in order to delimit the machine chamber (M) and the blow chamber (F); a refrigeration cycle circuit of which at least a part is arranged in the machine chamber (M) and through which a combustible refrigerant circulates; and a blower (35) arranged in the blow chamber (F). At the bottom of the dividing plate (50), a through hole (51) is formed which connects the machine chamber (M) with the blow chamber (F). (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

refrigeration cycle device

technical field

The present disclosure relates to a refrigeration cycle device using a combustible refrigerant.

Background art

Currently, hydrofluorocarbon (HFC) refrigerants, such as R410A, are used as a refrigerant in refrigeration cycle devices. Unlike previous hydrochlorofluorocarbon (HCFC) refrigerants such as R22, R410A has zero Ozone Depletion Potential (PACO) and does not damage the ozone layer, but R410A has the property of high global warming potential (GWP). For this reason, as part of the fight against global warming, the switch from high GWP HFC refrigerants, such as R410A, to low GWP HFC refrigerants is being investigated.

A low GWP HFC refrigerant candidate is R32 (CH ² F ² ; difluoromethane). Other refrigerant candidates with similar characteristics include halogenated hydrocarbons that have a carbon triple bond in their composition, such as HFO-1234yf (CF ³ CF=CH ² ; tetrafluoropropane) and HFO-1234ze (CF ³ -CH=CHF). . These are a type of HFC refrigerant similar to R32, but because unsaturated hydrocarbons with a carbon double bond are called olefins, the O for olefin is often used to refer to these refrigerants as HFOs, to distinguish these refrigerants from HFC refrigerants. that do not have a carbon double bond in their composition, such as R32.

These low global warming potential HFC refrigerants (including HFO refrigerants), although not as readily combustible as HC refrigerants such as R290 (C ³ H ⁸ ; propane), have a weakly combustible property, unlike the non-combustible R410A. (hereinafter, refrigerants having a combustible property will be referred to as combustible refrigerants). For this reason, it is necessary to be careful when it comes to refrigerant leaks.

Regarding this problem, in the patent document 1, for example, if a combustible refrigerant leak occurs and the combustible refrigerant accumulates in an electrical component box inside a machine room of an outdoor unit, it is made operating a fan housed in a blower chamber before operating a compressor housed in the machine room. Consequently, the combustible refrigerant accumulated inside the electrical component box of the machine room is forcibly discharged to the outside.

Reference list

patent document

Patent Document 1: Japanese Unexamined Patent Application Publication Named "Kokai" No. H11-94291 showing a refrigeration cycle device according to the preamble of claim 1.

Summary of the invention

technical problem

In the refrigerating cycle device described in Patent Document 1, the electric component box is arranged at an upper part inside the machine room. In addition, a blow hole for discharging combustible coolant accumulated in the electrical component box is formed at an upper part of a gap. Generally, combustible coolant is denser than air and has a higher specific gravity, so combustible coolant leaks accumulate not only in the electrical component box, but also in the lower part of the machine chamber. However, with the refrigeration cycle device described in Patent Document 1, it is physically difficult to make combustible refrigerant with a specific gravity greater than air accumulated in a location other than the electrical component box, such as the bottom bottom of the machine chamber, for example, pass through the blow hole and be discharged outside. For this reason, there is a need to further increase security.

The present invention has been devised in order to solve the above problem, and is aimed at providing a highly safe refrigeration cycle device.

Solution to the problem

In order to achieve the above objective, a refrigeration cycle device according to the present invention includes the features of claim 1.

Advantageous effects of the invention

In the present invention, outdoor air introduced from an introduction hole passes through a blow hole formed at a bottom of a gap, and is sent outside of a cover by a blower. For this reason, even in the case where, for example, the combustible refrigerant having a specific gravity greater than air escapes from the refrigeration cycle circuit and accumulates at the bottom of the first chamber, since it forms With a blow hole at the bottom of the gap, the combustible coolant is easily blown out of the cover along with the introduced outside air. Accordingly, a highly safe refrigeration cycle device can be provided.

Brief description of the drawings

Fig. 1 is a schematic diagram of a refrigeration cycle device according to Embodiment 1 of the present disclosure.

Fig. 2 is a perspective view of an outer machine of a refrigeration cycle device. Figure 3 is a perspective view of an outdoor machine with part of the cover removed from the state of Figure 2.

Figure 4 is a cross section along the line A-A in Figure 2.

Figure 5 is a perspective view of introduction holes formed in a side panel of the cover. Figure 6 is a perspective view of blow holes formed in a separation plate.

Fig. 7 is a diagram for explaining the operation of a refrigeration cycle device.

Fig. 8 is a diagram for explaining the positional relationship between blow holes formed in the separation plate, and a bell mouth.

Fig. 9 is a diagram of an external machine of a refrigeration cycle device according to Embodiment 2 of the present disclosure.

Fig. 10 is a perspective view of blow holes formed in a separation plate of a refrigeration cycle device according to Embodiment 3 of the present disclosure.

Fig. 11 is a front view of blow holes formed in a separation plate of a refrigeration cycle device according to Embodiment 4 of the present disclosure.

Fig. 12 is a perspective view of blow holes formed in a separation plate of a refrigeration cycle device according to Embodiment 5 of the present disclosure.

Fig. 13 is a perspective view of introduction holes formed in a cover of a refrigeration cycle device according to Embodiment 6 of the present disclosure.

Description of embodiments

Embodiment 1 of the invention. Hereinafter, a refrigeration cycle device 10 according to Embodiment 1 will be described using Figs. 1 to 8.

A refrigeration cycle device 10 according to Embodiment 1 of the present invention is an air conditioner that provides air conditioning for an air-conditioned room by circulating refrigerant through a refrigeration cycle circuit 100, for example. As illustrated in Fig. 1, the refrigeration cycle device 10 is of a separate type including an indoor machine 20 and an outdoor machine 30. For the refrigerant, Embodiment 1 uses the refrigerant HFC R32 (CH ² F ² ; difluoromethane), which has a lower global warming potential (GWP) and comparatively less effect on global warming than the refrigerant HFC R410A that is widely used in air conditioners today. This R32 is a combustible refrigerant. Furthermore, the refrigeration cycle device 10 includes, in addition to the indoor machine 20 and the outdoor machine 30, a controller that controls the refrigeration cycle circuit 100 and the like. The indoor machine 20 is installed inside the air-conditioned room, and is equipped with an indoor heat exchanger 21 and a fan 22.

The indoor heat exchanger 21 cools or heats the dimmed room by exchanging heat between the refrigerant and the surrounding air. For example, during the cooling operation, the indoor heat exchanger 21 works as an evaporator, and causes the incoming refrigerant to evaporate. Accordingly, the indoor heat exchanger 21 absorbs heat from the air surrounding the indoor heat exchanger 21 and cools the surrounding air. By supplying this cooled air to the room, the heated room is cooled as a result. Furthermore, during the heating operation, the indoor heat exchanger 21 works as a condenser, and causes the incoming gaseous refrigerant to condense. Accordingly, the indoor heat exchanger 21 emits heat to the air surrounding the indoor heat exchanger 21 and heats the surrounding air. By supplying this heated air to the room, the heated room is heated as a result.

The fan 22 is installed near the indoor heat exchanger 21, and includes a blower fan 22a and a fan motor 22b that rotates the blower fan 22a. By rotating the blower fan 22a, the blower 22 generates an airflow that passes through the indoor heat exchanger 21. Subsequently, the generated airflow supplies heat exchanged air to the conditioned room. The type of blower fan 22a of the blower 22 depends on the shape of the indoor machine 20. For example, a cross-flow fan or a turbofan can be used.

The outdoor machine 30 is installed outdoors and is equipped with a compressor 31, a four-way valve 32, an outdoor heat exchanger 33, an expansion valve 34 and a fan 35.

The compressor 31 is a device that compresses supplied refrigerant. As a result of being compressed by the compressor 31, the refrigerant flowing from a suction pipe 31a is converted into a high-temperature, high-pressure gaseous refrigerant. Subsequently, the compressor 31 sends the high-temperature and high-pressure refrigerant to the four-way valve 32 through a discharge pipe 31b. The high-temperature and high-pressure gaseous refrigerant compressed by the compressor 31 flows continuously in the discharge pipe 31b. Meanwhile, the low-temperature and low-pressure refrigerant flows in the suction pipe 31a. This low-temperature, low-pressure refrigerant is composed of gaseous refrigerant, or a two-phase refrigerant of gaseous refrigerant mixed with a small amount of liquid refrigerant. The compressor 31 is controlled by the controller.

The four-way valve 32 is provided downstream of the compressor 31. The four-way valve 32, by switching the flow direction of the refrigerant within the refrigeration cycle circuit 100, switches to one of a heating operation cycle and a refrigeration operation cycle. The four way valve 32 is controlled by the controller.

The outdoor heat exchanger 33 exchanges heat with the air by evaporating or condensing the incoming refrigerant, thus cooling or heating the air. For example, during the cooling operation, the outdoor heat exchanger 33 works as a condenser, and causes the incoming refrigerant to condense. Furthermore, during the heating operation, the outdoor heat exchanger 33 works as an evaporator, and causes the incoming refrigerant to evaporate.

The expansion valve 34 is a pressure reducing device with a variable degree of opening. The expansion valve 34 is formed, for example, by an electronically controlled expansion valve. By causing the incoming refrigerant to expand, the expansion valve 34 reduces the high pressure of the refrigerant to a low pressure. Next, the expansion valve 34 supplies the generated low-pressure refrigerant.

The fan 35 is installed near the outdoor heat exchanger 33, and includes a blower fan 35a and a fan motor 35b that rotates the blower fan 35a. By rotating the blower fan 35a, the blower 35 generates an airflow that passes through the outdoor heat exchanger 33. Subsequently, the heat exchanged air is blown outside by the generated airflow. In Embodiment 1, a propeller fan sucking air from the side or the rear is used for the blowing fan 35a of the blower 35. The blower 35 also includes two blowing fans 35a. However, the configuration is not limited to this, and the blower 35 may also include a number of blowing fans 35a other than two. For example, the blower 35 may also include a blower fan 35a.

The refrigeration cycle circuit 100 is configured to include the indoor heat exchanger 21, the compressor 31, the four-way valve 32, the outdoor heat exchanger 33, the expansion valve 34, the flow channels that join these elements (a flow channel carrying refrigerant and including a suction pipe 31a and a discharge pipe 31b, as well as connecting pipes 11a and 11b), and the like.

Figure 2 is a perspective view of the outer machine 30 of the refrigeration cycle device 10. Figure 3 is a perspective view of the outer machine 30 with part of the cover 40 removed from the state illustrated in Figure 2 Figure 4 is a cross section along line AA in Figure 2. It should be noted that the XY plane in the drawings is a horizontal plane, while the Z axis direction in the drawings is a vertical direction. As illustrated in Figures 2 and 3, the outer machine 30 includes the respective elements above (such as the compressor 31, the four-way valve 32, the outdoor heat exchanger 33 and the blower 35), as well as a cover 40 that houses these respective elements.

As illustrated in Fig. 2, the cover 40 is an element that forms the outer contour of the outer machine 30. The cover 40 includes a top panel 41, a side panel 42, and front panels 43 and 44. The top panel 41 , the side panel 42 and the front panels 43 and 44 are formed, for example, by metal sheets. It should be noted that the top panel 41, the side panel 42 and the front panels 43 and 44 are preferably made of a material with excellent fire resistance. The upper panel 41 forms the upper face (the face of the Z side) of the cover 40.

The side panel 42 is formed so that an XY cross section thereof is L-shaped. The side panel 42 forms the side face (the X side face) and part of the rear face (the Y side face) of the cover 40. In the side panel 42, introduction holes 45 are formed to introduce outside air.

As illustrated in Figure 5, the introduction holes 45 are formed by multiple rectangular holes. Specifically, the cross-sectional shape of each introduction hole 45 is a rectangle with the longest direction in the Y-axis direction. The length L1 in the shortest direction of the introduction holes 45 (the length in the Y-axis direction Z) is predetermined based on the extinction distance of the refrigerant. In this case, the extinguishing distance is the dimension of a gap through which a flame cannot propagate (the flame is extinguished). At this distance or less, the flame becomes incapable of propagation. In other words, the flame is unable to pass through it. This extinguishing distance differs depending on the type of refrigerant. In Embodiment 1, HFC R32 refrigerant is used as the refrigerant. The extinction distance of the R32 is 6 mm. Accordingly, the introduction holes 45 are formed so that the length L1 in the shortest direction is 6 mm or less. Specifically, the length L1 in the shortest direction of the introduction holes 45 is set to 5.5 mm, for example. However, the configuration is not limited thereto, and the length L1 of the introduction holes 45 may be a dimension other than 5.5 mm as long as the length is 6 mm or less.

In addition, the insertion holes 45 are plurally formed at equal intervals along the direction of the Z axis. The number of the insertion holes 45 is 10, for example. However, the number of holes is not limited thereto, and it can also be a number other than 10. However, if there are too few holes, the total cross-sectional area of the introduction holes 45 becomes too small, the resistance to blowing increases and the air circulates less fluidly. Therefore, it is desirable to form approximately 10 holes, sufficient to allow air to circulate smoothly. It should be noted that the introduction holes 45 are formed at a higher position than the blow hole 51 formed in the separation plate 50 which will be discussed later.

Returning to Fig. 2, the front panel 43 is a plate-like element made of metal, and it forms the front face (the face in the -Y direction) of the cover 40. The blow openings 46 for air blown from the blower 35 are formed in the front panel 43. The blow openings 46 have an approximately circular shape. In addition, two blower openings 46 are formed, corresponding to the installed number of blower fans 35a of the blower 35. Fan guards 47 having a mesh part to ensure safety while the blower fans 35a are running are fixed to the blow openings 46.

Furthermore, on the inner sides of each blow opening 46 of the front panel 43, a tubular bell mouth 48 is formed, as illustrated in Fig. 4. The bell mouth 48 is integrally formed with the front panel 43. The outer circumferential face of the bell mouth 48 is formed in a curved face. As a result of the formation of this bell mouth 48, the flow of air blown from the blowing fans 35a of the blower 35 is stabilized.

The front panel 44 is formed such that a cross section XY thereof is L-shaped, and forms the front face (the face of the -Y side) and part of the side face (the face of the X side) of the cover. 40. It should be noted that these panels discussed above (such as top panel 41, side panel 42, and front panels 43 and 44) may be configured to be additionally removable, or several of these panels discussed above may be integrally formed.

Furthermore, as illustrated in Fig. 3, the outer machine 30 includes a partition plate 50 (partition) that separates the interior of the cover 40 into two spaces. The partition plate 50 is formed by extending in the vertical direction (Z-direction) from the bottom of the cover 40. By this partition plate 50, the interior of the cover 40 is divided into a machine chamber M (first chamber). housing elements such as the compressor 31 and electronic components for controlling the refrigeration cycle circuit 100, and a blow chamber F (second chamber) housing elements such as the blower 35. The machine chamber M is formed in the X-side (the right side from a front view) of the cover 40, while the blow chamber F is formed on the X-side (the left side from a front view) inside the cover 40. The separation plate 50 serves to prevent the ingress of rainwater due to rainy weather and the like in the chamber of the machine M through the blow chamber F. At the bottom (the edge of the -Z side) of the separation plate 50, blow holes 51 are formed which connect the chamber of the machine M with the chamber hole F. The blow holes 51 are formed at a lower position than the introduction holes 45 of the cover 40.

As illustrated in Figure 6, the blow holes 51 are formed by multiple rectangular holes. Specifically, the cross-sectional shape of each blow hole 51 is a rectangle with the longest direction in the Y-axis direction. The length L2 in the shortest direction of the blow holes 51 (the length in the Y-axis direction Z) is predetermined based on the extinction distance of the refrigerant. In Embodiment 1, since HFC R32 refrigerant is used as the refrigerant, the quenching distance of R32 is 6 mm. Accordingly, the blow holes 51 are formed so that the length L2 in the shortest direction is 6 mm or less. Specifically, the length L2 in the shortest direction of the blow holes 51 is set to 5.5 mm, for example. However, the configuration is not limited thereto, and the length L2 of the blow holes 51 may be a dimension other than 5.5 mm as long as the length is 6 mm or less.

In addition, the blow holes 51 are formed plurally at equal intervals along the Z axis direction. The number of the blow holes 51 is 10, for example. However, the number of holes is not limited thereto, and it can also be a number other than 10. However, if there are too few holes, the total cross-sectional area of the blow holes 51 becomes too small, the resistance to blowing increases and the air circulates less fluidly. Therefore, it is desirable to form approximately 10 holes, sufficient to allow air to circulate smoothly.

Furthermore, as illustrated in Fig. 8, the blow holes 51 are shaped so that they are covered by the bell mouth 48 and are not exposed to the outside from the blow openings 46.

As illustrated in Fig. 3, the compressor 31 is arranged inside the machine chamber M. The compressor 31 is arranged at the bottom of the machine chamber M through anti-vibration rubber or the like, for example. The compressor 31 is a scroll compressor that includes a fixed scroll and a movable scroll that revolves around the fixed scroll. This rotation reduces the volume of the compression chamber and compresses the refrigerant.

It should be noted that the compressor 31 is not limited to a scroll compressor. The compressor 31 may also be a rotary compressor in which a circular piston eccentrically rotates the internal space of a cylindrical cylinder, thereby decreasing the volume of the compression chamber formed between the inner circumferential face of the cylinder and the outer circumferential face of the cylinder. piston, and compressing the refrigerant. Additionally, a compressor of a type other than a scroll compressor and a rotary compressor is also acceptable.

In addition, on the upper side (Z side) of the compressor 31 arranged at the bottom of the machine chamber M, the four-way valve 32 and a group of refrigerant pipes 36 are arranged. In this case, the group of pipes of refrigerant 36 is carried out to include such items as a refrigerant pipe connecting the connection pipe 11a and the four-way valve 32, as well as the suction pipe 31a and the discharge pipe 31b connected to the compressor 31, For example.

In the upper part (the part on the Z side) of the machine chamber M, an electronic component box 61 is arranged which houses multiple electronic components constituting the controller (such as a smoothing capacitor, for example), and a circuit board on which these electronic components are mounted, and the like. The electronic component box 61 is formed at a higher position than the introduction holes 45 of the cover 40, in order to prevent the ingress of rainwater and the like. Specifically, the electronic component box 61 is arranged so that the height of the lower edge 61a (the -Z side edge) becomes the same height as the height of the upper edge 45a of the insertion holes 45 (the upper edge of the of the highest introduction hole 45 among the multiple introduction holes 45).

The electronic component box 61 is a roughly cubic shaped casing. A vent hole 62 is formed on the X-side wall face of the electronic component box 61. As illustrated in Fig. 7, a vent hole 63 is also formed on the --side wall face. X of the electronic component case 61. The vent 62 is used as an air inlet for cooling the electronic components, while the vent 63 is used as an air outlet.

In addition, at the top (the edge of the Z side) of the separation plate 50, blow holes 52 are formed. The blow holes 52 are formed facing away from the ventilation hole 63 of the electronic component case 61. The air flowing from the vent 63 of the electronic component box 61 passes through these blow holes 52. Similar to the blow holes 51 formed at the bottom, the blow holes 52 are formed by multiple rectangular holes. Specifically, the cross-sectional shape of each blow hole 52 is a rectangle with the longest direction in the Y axis direction. In addition, similar to the blow holes 51, the length in the direction The shortest length of the blow holes 52 is also predetermined based on the extinction distance of the refrigerant. The blow holes 52 are plurally formed at equal intervals along the Z axis direction. The number of the blow holes 52 is 10, for example. However, the number of holes is not limited thereto, and may also be a number other than 10.

Returning to Fig. 3, elements such as the outdoor heat exchanger 33 and the blower 35 are arranged in the blow chamber F. The two blow fans 35a of the blower 35 are arranged along the Z-axis direction. A fan motor 35b is attached to the rear face of each blower fan 35a. The fan motors 35b are supported by a fan motor support plate 35c. The fan motor support plate 35c is provided by extending in the vertical direction (Z-direction) from the bottom of the cover 40. In addition, the outdoor heat exchanger 33 is arranged so as to cover the blower 35. Specifically, the heat exchanger The outer heat exchanger 33 is formed such that a cross section XY thereof is L-shaped, and is arranged so as to cover a rear face (the face of the Y side) and a side face (the side on the side - X) of the blower 35.

The controller is formed by an indoor machine control device of the indoor machine 20 and an outdoor machine control device of the outdoor machine 30, for example, and controls the operation of the refrigerating cycle device 10. The controller controls the rotation of the blowing fans 22a and 35a by applying a voltage as a function of the number of revolutions of the blowing fans 22a and 35a of the blowers 22 and 35, for example. The external machine control device of the external machine 30 is configured to include the electronic components housed in the electronic component box 61 discussed above.

The indoor machine coolant flow channel 20 and the outdoor machine coolant flow channel 30 are connected by the two connecting pipes 11a and 11b, as illustrated in Fig. 1. The connecting pipes 11a and 11b are connected to the respective flow channels of the inner machine 20 and the outer machine 30 by means of wing nuts or the like, for example. Accordingly, the refrigeration cycle circuit 100 is configured in a sealed circuit from the outside.

The refrigeration cycle device 10 configured as discussed above provides air conditioning for an air-conditioned room by performing cooling operation, dehumidifying operation, heating operation, blowing operation, and the like. The blowing operation is the operation that supplies air using only the blower 22, without running the refrigeration cycle of the refrigeration cycle device 10. The cooling operation, the dehumidifying operation and the heating operation are operations that supply air cold and hot air using the blower 22, while also starting the refrigeration cycle. The operation of the refrigeration cycle is the same for the refrigeration operation and the dehumidification operation. Hereinafter, the operations of the refrigeration cycle will be described using Fig. 1. The solid arrows in Fig. 1 indicate the flow of refrigerant during the refrigeration operation and the dehumidification operation. Furthermore, the dashed arrows in Fig. 1 indicate the flow of refrigerant during the heating operation.

In the case of refrigeration operation, the four-way valve 32 is switched to supply refrigerant from the compressor 31 to the outdoor heat exchanger 33. As a result, the refrigerant flows as indicated by the solid arrows in Fig. 1 In this case, the outdoor heat exchanger 33 works as a condenser, while the indoor heat exchanger 21 works as an evaporator.

First, when the refrigerant flows to the compressor 31, the compressor 31 compresses the incoming refrigerant. As a result, the pressure and specific enthalpy of the refrigerant increase, and the refrigerant is converted into a high-temperature, high-pressure gaseous refrigerant and is sent out of the compressor 31. The gaseous refrigerant sent from the compressor 31 passes through the discharge pipe. discharge 31b and four-way valve 32, and flows to outdoor heat exchanger 33.

When the gaseous refrigerant flows into the outdoor heat exchanger 33, the refrigerant condenses due to heat exchange with the external air (outdoor air) supplied by the blower 35. Consequently, the specific enthalpy of the refrigerant decreases, while the pressure Remains constant. As a result, the gaseous refrigerant is converted into a high-pressure, low-temperature liquid refrigerant. Next, this liquid refrigerant is sent out of the outdoor heat exchanger 33.

When the liquid refrigerant flows to the expansion valve 34, the liquid refrigerant expands due to the expansion valve 34. Subsequently, the liquid refrigerant is depressurized while the specific enthalpy remains constant, and the refrigerant changes to a low-pressure state. At this point, the refrigerant becomes a gas-liquid two-phase refrigerant in which the gaseous refrigerant and the liquid refrigerant are intermixed. Next, this gas-liquid two-phase refrigerant is sent out of the expansion valve 34.

The gas-liquid two-phase refrigerant sent out of the expansion valve 34 passes through the connection pipe 11b, and flows into the refrigerant flow channel of the indoor machine 20. Subsequently, the refrigerant flows into the heat exchanger. indoor heat 21 from indoor machine 20.

When the gas-liquid two-phase refrigerant flows into the indoor heat exchanger 21, the refrigerant evaporates due to heat exchange with the indoor air of the heated room supplied by the blower 22. Consequently, the specific enthalpy of the refrigerant increases. while the pressure remains constant. As a result, the refrigerant changes to a high-temperature, low-pressure gaseous refrigerant in a heated state. Additionally, the air subjected to heat exchange is supplied to the room and thus the indoor air is cooled. As a result, the ambient temperature in the heated room drops.

The gaseous refrigerant in a heated state sent out of the indoor heat exchanger 21 passes through the connection pipe 11a, and flows into the outdoor machine refrigerant flow channel 30. Then, the refrigerant flows back into the compressor 31 through the four-way valve 32 and the suction pipe 31a of the outdoor machine 30. After that, the above refrigerating cycle is repeated. It should be noted that the refrigeration cycle for the dehumidification operation is similar to the above refrigeration cycle for the refrigeration operation.

Next, in the case of the heating operation, the four-way valve 32 is switched to supply refrigerant from the compressor 31 to the indoor heat exchanger 21. As a result, the refrigerant flows as indicated by the dashed arrows in the figure. Figure 1. In this case, the outdoor heat exchanger 33 works as an evaporator, while the indoor heat exchanger 21 works as a condenser.

The gaseous refrigerant sent out of the compressor 31 passes through the discharge pipe 31b and the four-way valve 32, and flows out of the outdoor heat exchanger 30. Subsequently, the refrigerant passes through the connection pipe 11a and flows towards the indoor heat exchanger 21.

When the gaseous refrigerant flows into the indoor heat exchanger 21, the refrigerant condenses due to heat exchange with the indoor air of the heated room supplied by the blower 22. Consequently, the specific enthalpy of the refrigerant decreases, while the pressure Remains constant. As a result, the gaseous refrigerant changes from a high-pressure, low-temperature liquid refrigerant to a supercooled state. Additionally, the air subjected to heat exchange is supplied to the room, and thus the indoor air is heated. As a result, the ambient temperature in the heated room rises.

The liquid refrigerant in a supercooled state sent out of the indoor heat exchanger 21 passes through the connection pipe 11b, and flows into the outdoor machine refrigerant flow channel 30. Subsequently, the refrigerant flows to the expansion valve. 34 of the outer machine 30.

When the liquid refrigerant flows into the expansion valve 34, the liquid refrigerant expands due to the expansion valve 34. Subsequently, the liquid refrigerant is depressurized while the specific enthalpy remains constant, and the refrigerant changes to a state of low temperature and low pressure. At this point, the refrigerant becomes a gas-liquid two-phase refrigerant in which the gaseous refrigerant and the liquid refrigerant are intermixed. Next, this gas-liquid two-phase refrigerant is sent out of the expansion valve 34. Subsequently, the refrigerant flows to the expansion valve 34 of the outdoor machine 30.

When the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 33, the gas-liquid two-phase refrigerant condenses due to heat exchange with the outdoor air (outdoor air) supplied by the blower 35. Therefore, the specific enthalpy of the refrigerant increases, while the pressure remains constant. As a result, the gas-liquid two-phase refrigerant changes to a high-temperature, low-pressure gas refrigerant in a heated state. Next, this gaseous refrigerant is sent out of the outdoor heat exchanger 33.

The gaseous refrigerant in a heated state sent out of the outdoor heat exchanger 33 flows to the compressor 31 again through the four-way valve 32 and the suction pipe 31a. After that, the above refrigeration cycle is repeated.

In the refrigeration cycle device 10 configured as discussed above, if an instruction to start the operation such as cooling operation or heating operation is transmitted from a user to the controller of the refrigeration cycle device 10 Before operating the refrigeration cycle, the controller first causes the blower fans 35a of the blower 35 of the outdoor machine 30 to rotate for a predetermined time. The rotation time of the blowing fans 35a is stored in advance in the memory of the controller. In Embodiment 1, the set time for rotating the blowing fans 35a is one minute.

Since the blowing fans 35a are propeller fans, when the blowing fans 35a rotate, air is sucked from the rear face and the side sides of the blowing fans 35a. Due to the suction of the blowing fans 35a, the outside air of the outdoor machine 30 is drawn into the machine chamber M from the introduction holes 45 of the cover 40, as indicated by the arrow W1 in the figure. figure 7.

Part of the air introduced into the machine chamber M moves upwards (Z direction) inside the machine chamber M, and flows into the electronic component box 61 from the vent hole 62, as shown by arrow W2. The air flowing to the electronic component box 61 passes through the interior of the electronic component box 61, as indicated by the arrow W3. At this point, if the current is flowing and producing heat on the electronic components and circuit board housed in the electronic component box 61, the airflow passing through the inside of the electronic component box 61 works as air cooling unit that cools the circuit board that is producing heat. The air passing through the inside of the electronic component box 61 flows out of the vent 63. Subsequently, the air flowing out of the vent 63 flows into the blow chamber F through the blow holes 52 of the separation plate 50, as indicated by the arrow W4.

At this point, depending on the location of the refrigerant leak of the refrigeration cycle circuit 100, the combustible refrigerant may accumulate in the electronic component box 61 in some cases. In this case, the accumulated combustible refrigerant is ejected from the hole air flow 63 together with the air flowing into the electronic component box 61 and subsequently flowing into the blow chamber F through the blow holes 52 of the separation plate 50. In other words, the air flow air passing through the blow holes 52 functions as an air flow to evacuate the combustible coolant. Subsequently, the air flowing into the blow chamber F is blown out of the blow openings 46 by the blow fans 35a, as indicated by arrows W8 and W9. The expelled combustible refrigerant is dissipated outside, and the concentration of refrigerant goes out of the combustible range, thus the safety can be ensured.

Additionally, part of the air introduced into the machine chamber M also moves downwards (-Z direction) within the machine chamber M, as indicated by arrow W5. If part of the air moves downwards inside the machine chamber M, the air moves vertically downwards along the inside of the machine chamber M. Subsequently, the air passes through the vicinity of the compressor 31 and the like, as indicated by arrow W6. The air passing through the vicinity of the compressor 31 and the like flows into the blow chamber F through the blow holes 51 of the separation plate 50, as indicated by the arrow W7.

At this point, if a combustible refrigerant leaks from the refrigeration cycle circuit 100 (for example, from the compressor 31 or from the connecting pipes 11a and 11b connected to the compressor 31), the combustible refrigerant, being more dense than air, accumulates at the bottom of the machine chamber M. In this case, the accumulated combustible coolant converges with the air indicated by arrows W5 and W6 which travels downwards inside the machine chamber M. Subsequently , the combustible refrigerant accumulated in the bottom flows together with the air into the blow chamber F through the blow holes 51 of the separation plate 50, as indicated by the arrow W7. In other words, the air flow passing through the blow holes 51 functions as an air flow for evacuating the combustible coolant. Subsequently, the air flowing into the blow chamber F is blown out of the blow openings 46 by the blow fans 35a, as indicated by arrows W8 and W9. The expelled combustible refrigerant is dissipated outside, and the concentration of refrigerant goes out of the combustible range, thus the safety can be ensured.

It should be noted that the minute set as the time for rotating the blowing fans 35a before operating the refrigeration cycle is, in Embodiment 1, a conceivable time that allows the combustible refrigerant accumulated in the machine chamber M or in the electronic component box 61 is ejected completely. However, since this set time depends on factors such as the volume and shape of the machine chamber M and the electronic component box 61, the set time should be appropriately modified according to the configuration and model of the outdoor machine 30 .

After rotating the blowing fans 35a of the blower 35 for a predetermined time while in a non-operational state of the refrigeration cycle, the controller of the refrigeration cycle device 10 switches the four-way valve 32 of the outdoor machine 30 according to the indicated operation mode (such as heating operation, cooling operation or dehumidifying operation, for example). Subsequently, the refrigerant compression operation of the compressor 31 is started by rotating the rotating scroll of the compressor 31. Accordingly, the refrigerant is circulated through the refrigeration cycle circuit 100. As a result, the indicated operation mode is started .

It should be noted that, even after starting the indicated operating mode, the aspiration of the blowing fans 35a continue to cause the outside air of the outdoor machine 30 to be drawn into the machine chamber M from the introduction holes 45 of the cover 40. Part of the air drawn into the machine chamber M moves upwards inside the machine room M and flows into the electronic component box 61, thus cooling the electronic components and the circuit board housed in the electronic component box 61. In addition, the air introduced into the machine room M is it travels down into the machine chamber M and passes through the vicinity of the compressor 31 and the like, thus moderating the temperature rises in the compressor 31 in operation. Accordingly, the operating efficiency of the compressor 31 is increased.

As described above, in the refrigerating cycle device 10 according to Embodiment 1, the blow holes 51 are formed at the bottom of the separation plate 50. For this reason, the air introduced from the introduction holes 45 formed on the side panel 42 of the cover 40 passes through these blow holes 51, and is blown out of the cover 40 by the blower 35. Therefore, even in a case where the refrigerant leaks from the cooling circuit, refrigeration cycle 100 inside the machine room M and accumulates at the bottom of the machine room M, the combustible refrigerant is exhausted outside the cover 40 together with the introduced outside air.

For example, in a case where, as with a related-art refrigeration cycle device 10, blow holes 51 are not formed at the bottom of the separation plate 50 and only blow holes 52 are formed on top of the separation plate 50, if the refrigerant leaks from the refrigeration cycle circuit 100 into the machine chamber M, the combustible refrigerant, being heavier than air, accumulates in the bottom of the machine chamber M. Since the coolant accumulated at the bottom must move upwards (in the direction against gravity) to pass through the blow holes 52 on the top by suction based on rotation of the blowing fans 35a of the blower 35, it becomes difficult to remove all the accumulated refrigerant from the machine chamber M. Furthermore, in the case where the electronic component box 61 is arranged on the top or from the machine chamber M, the electronic components housed in the electronic component box 61 can potentially become an ignition source if ignited. For this reason, there is a risk that upwardly moving coolant could pass close to such a potential source of ignition.

On the contrary, in the refrigerating cycle device 10 according to embodiment 1, since the blow holes 51 are formed at the bottom of the separation plate 50, the refrigerant accumulated in the bottom of the machine chamber M it is easily blown out of the cover 40 by the outside air introduced from the introduction holes 45 formed in the side panel 42 of the cover 40. Therefore, the safety of the refrigeration cycle device 10 can be increased.

Furthermore, in the refrigerating cycling device 10 according to embodiment 1, since the blow holes 51 are formed at the bottom of the separation plate 50, even though the refrigerating cycling device 10 is stopped, the refrigerant can be blown out. from the blow openings 46 of the blow chamber F based on natural convection. Namely, the combustible coolant accumulated at the bottom of the machine chamber M passes through the blow holes 51 formed at the bottom with time by natural convection. It is then naturally blown out of the blow openings 46 of the blow chamber F. Therefore, in Embodiment 1, the leaked combustible coolant is less likely to accumulate at the bottom of the machine chamber M even while the refrigeration cycle device 10 is stopped, and the safety of the refrigeration cycle device 10 can be further increased.

In addition, in Embodiment 1, the introduction holes 45 for introducing outside air are formed at a higher position than the blow holes 51. For this reason, the outside air introduced from the introduction holes 45 flows vertically downward along along the inside of the machine chamber M from a high position to a low position, following gravity. Consequently, the combustible coolant accumulated in the bottom of the machine chamber M can be more easily blown out of the cover 40.

In addition, in Embodiment 1, the introduction holes 45 are formed at a lower position than the electronic component box 61. For this reason, rainwater entering from the introduction holes 45 is less likely to enter in the electronic component box 61. As a result, failure of the electronic components housed in the electronic component box 61 can be prevented.

Furthermore, in Embodiment 1, before starting the refrigeration cycle operation, the blower fans 35a of the blower 35 are rotated for a predetermined time. For this reason, even in a case where the combustible refrigerant has accumulated in the bottom of the machine chamber M (around the compressor 31), the combustible refrigerant can be blown out of the cover 40 before starting the operation of the compressor. refrigeration cycle. Accordingly, the combustible refrigerant can be removed from around the compressor 31 before the electrical components and electronic components included in the compressor 31 are turned on, and the safety of the refrigeration cycle device 10 can be increased.

Furthermore, in embodiment 1, part of the air introduced into the machine chamber M moves upward (Z direction) inside the machine chamber M, and flows into the electronic component box 61. For this reason, the electronic components and the circuit board inside the electronic component box 61 can be cooled.

Furthermore, in Embodiment 1, part of the air introduced into the machine room M moves downwards (-Z direction) within the machine room M, and passes through the vicinity of the compressor 31 and the like. For this reason, in the case where the refrigeration cycle is running, the temperature rises in the running compressor 31 can be moderated. Accordingly, the decrease in the operating efficiency of the compressor 31 can be moderated.

In Embodiment 1, part of the air introduced into the machine chamber M moves upward (Z direction) inside the machine chamber M, and passes through the electronic component box 61. Similarly, part of the air introduced into the machine chamber M moves downwards (-Z direction) within the machine chamber M, and passes through the vicinity of the compressor 31 and the like. Accordingly, the cooling of the electronic components and the circuit board within the electronic component case 61 and the moderation of temperature rises in the compressor 31 can be carried out at the same time.

In addition, in embodiment 1, the blow holes 51 formed at the bottom of the separation plate 50 are covered by the bell mouth 48 so that they are not exposed from the blow openings 46 of the cover 40. Therefore, ingress of rainwater due to rainy weather and the like into the chamber of the machine M can be prevented. As a result, the electronic components in the electronic component box 61 as well as the compressor 31 arranged in the machine chamber M can be protected, and failure thereof can be prevented.

Furthermore, in Embodiment 1, the length L2 in the shortest direction of the blow holes 51 of the separation plate 50 is predetermined based on the extinction distance of the refrigerant. For this reason, even in the remote possibility that the combustible coolant accumulated inside the machine chamber M ignites, the coolant flame is unable to pass through the blow holes 51 and therefore the coolant flame does not escape outside the machine chamber M, nor does the coolant flame escape outside the cover 40. In addition, after the combustible coolant acting as an ignition source is completely burned out, the flame it extinguishes naturally. Accordingly, the safety of the users of the refrigeration cycle device 10 can be guaranteed, and the safety of the refrigeration cycle device 10 can be increased.

Similarly, the length L1 in the shortest direction of the introduction holes 45 in the side panel 42 of the cover 40 is also predetermined based on the extinction distance of the refrigerant. For this reason, even in the remote possibility that the combustible coolant accumulated inside the machine chamber M ignites, the coolant flame is unable to pass through the introduction holes 45 and therefore the flame of the refrigerant does not leak out of the cover 40. Therefore, the safety of the users of the refrigeration cycle device 10 can be guaranteed, and the safety of the refrigeration cycle device 10 can be increased.

The above therefore describes Embodiment 1 of the present invention, but the present disclosure is not limited to Embodiment 1 above.

For example, in the refrigeration cycle device 10 according to the above embodiment 1, the refrigerant HFC R32 (CH ² F ² ; difluoromethane) is used as the refrigerant. However, the refrigerant is not limited to it. For example, the refrigerant may be an HFC refrigerant similar to R32, the slightly combustible refrigerant HFO1234yf (CF ³ CF=CH ² ; tetrafluoropropane), or HFO1234ze (CF ³ CF=CHF). The refrigerant can also be a highly combustible refrigerant, such as R290 (propane). Furthermore, the refrigerant may also be a mixed refrigerant of the above. Although the refrigerant is strongly combustible, the refrigeration cycle device 10 according to the above embodiment 1 is capable of showing safety effectively. It should be noted that in the present disclosure, combustible refrigerants include all refrigerants that have the possibility of combustion, from weakly combustible refrigerants to strongly combustible refrigerants.

realization 2

In addition, in the above embodiment 1, the introduction holes 45 for introducing outside air are formed so that the height of the upper edge 45a is the same height as the height of the lower edge 61a of the electronic component box 61, as shown. illustrated in Fig. 7. However, the configuration is not limited to it. For example, as illustrated in Fig. 9, the introduction holes 45 can also be formed at a position higher than the blow holes 51 formed in the separation plate 50, and formed at a position lower than the box. of electronic components 61. However, with higher positions of the introduction holes 45, the outside air introduced from the introduction holes 45 more easily flows vertically downward along the inside of the machine chamber M from a high position up a low position, following gravity. Therefore, in order to smoothly expel the combustible coolant, the introduction holes 45 are preferably formed at as high a position as possible. In addition, in order to prevent rainwater from entering the electronic component box 61, the introduction holes 45 are preferably formed at a lower position than the electronic component box 61. Specifically, it is more preferable that the height of the upper edge 45a of the insertion holes 45 is the same height as the height of the lower edge 61a of the electronics box 61, so that the insertion holes 45 are positioned directly under the electronics box 61, such as illustrated in figure 7.

In addition, in the above embodiment 1, the blow holes 51 connecting the machine chamber M with the blow chamber F are formed at the bottom of the separation plate 50, as illustrated in Fig. 7. Specifically , the blow holes 51 are formed near the lower edge of the separation plate 50. In the present disclosure, the bottom of the separation plate 50 indicates the side below the middle position of the separation plate 50 in the direction of the Z axis. Therefore, if the blow holes 51 are located below the middle position of the separation plate 50, the blow holes 51 can also be formed in a position other than the position shown in Fig. 7 However, from the viewpoint of the ease of expelling the dense combustible refrigerant, the position where the blow holes 51 are formed is preferably as low a position as possible. However, if the position where the blow holes 51 are formed is at the lowermost edge of the partition plate 50, the water accumulated in the blow chamber F due to rainy weather or the like is more likely to flow out. backwards towards the chamber of the machine M. For this reason, it is most preferable that the lower edge of the blow holes 51 be in a position several centimeters (for example, 1 cm to 3 cm) higher than the bottom of the machine chamber M and the blow chamber F.

realization 3

In the above embodiment 1, the blow holes 51 of the separation plate 50 are formed so that a cross section YZ thereof assumes a rectangular shape, as illustrated in Fig. 6. However, the configuration is not limited thereto, and insofar as the shortest dimension of the blow holes 51 is predetermined based on the extinction distance, the blow holes 51 can also be formed with a cross section of a shape other than a rectangle. For example, as illustrated in Fig. 10, the blow holes 51 can also be formed such that a cross section YZ thereof assumes a circular hole shape. In this case, the diameter D1 of the circular hole shape becomes 6 mm or less, based on the extinction distance of the R32 that is used as the refrigerant.

realization 4

As illustrated in Fig. 11, the blow holes 51 can also be formed so that a cross section YZ thereof assumes an elliptical shape. In this case, the minor dimension L3 of the elliptical shape becomes 6 mm or less, based on the extinction distance of the R32 that is used as a refrigerant. Additionally, the cross section of the blow holes 51 may have an oval shape, or a shape other than the above (rectangular shape, circular shape, elliptical shape, oval shape).

It should be noted that the cross-sectional shape of the blow holes 51 is specifically described as not limited to a rectangular shape, as indicated in Embodiment 1 above, the cross-sectional shape of the introduction holes 45 formed in the panel side 42 of cover 40 is also similar. In the above embodiment 1, the introduction holes 45 are formed so that a cross section YZ thereof assumes a rectangular shape, as illustrated in Fig. 5. However, the configuration is not limited thereto, and in Insofar as the shortest dimension of the blow holes 51 is predetermined based on the extinction distance, the introduction holes 45 can also be formed with a cross section of a shape other than a rectangle. For example, the introduction holes 45 can also be formed so that a cross section YZ thereof assumes a circular hole shape. In this case, the diameter of the circular hole shape becomes 6 mm or less, based on the extinction distance of R32 that is used in the embodiments.

Additionally, the introduction holes 45 can also be formed so that a cross section YZ thereof assumes an elliptical shape. In this case, the minor dimension of the elliptical shape becomes 6 mm or less, based on the extinction distance of R32 that is used in the embodiments. Additionally, the cross section of the blow holes 51 may have an oval shape, or a shape other than the above (rectangular shape, circular shape, elliptical shape, oval shape).

It should be noted that since the quenching distance differs depending on the type of refrigerant, it is necessary to modify the dimensions of the introduction holes 45 and the blow holes 51 and 52 as appropriate, depending on the refrigerant used in the refrigeration cycle device. refrigeration 10.

realization 5

As illustrated in Fig. 12, at the blow holes 51 formed in the separation plate 50 there can also be provided screens 71 formed to cover the openings on the -X side (the openings on the blow chamber F side). . The screens 71 cover the front side (-X side), the upper side (Z side) and the lateral sides (Y side and -Y side) of the blow holes 51, for example. As a result of the formation of these screens 71, the openings of the blow holes 51 are substantially formed to face downwards (-Z direction). The screens 71 may be integrally formed with the partition plate 50, or formed separately and subsequently attached to the partition plate 50. By forming these screens 71, rainwater due to rainy weather flows downward along the of the screens 71, thus preventing the ingress of rainwater from the blowing chamber F into the machine chamber M. As a result, the electronic components in the electronic component box 61, as well as the compressor 31 arranged in the chamber of the machine M can be protected, and failure thereof can be prevented.

realization 6

Similarly, as illustrated in Figure 13, in the introduction holes 45 formed in the side panel 42 of the cover 40, screens 72 formed to cover the openings on the X side (the openings on the X side) can also be provided. of cover 40). The screens 72 cover the front side (X side), the upper side (Z side) and the lateral sides (Y side and -Y side) of the introduction holes 45, for example. As a result of the formation of these screens 72, the openings of the introduction holes 45 are substantially formed to face downwards (-Z direction). The screens 72 may be integrally formed with the side panel 42, or formed separately and subsequently attached to the side panel 42. By forming these screens 72, rainwater due to rainy weather flows down the length of the screens. 72, thus preventing the ingress of rainwater from the outer side of the cover 40. As a result, the electronic components in the electronic component box 61, as well as the compressor 31 arranged in the machine room M can be protected, and failures thereof can be avoided.

In addition, although Embodiments 1 to 6 describe an example of using the refrigeration cycle device 10 in an air conditioner, the refrigeration cycle device 10 is also applicable to other equipment, such as the heat source machine of a water heater.

Various embodiments and alterations of the present disclosure are possible without departing from the scope of the invention, as defined by the appended claims.

industrial applicability

A refrigeration cycle device of the present disclosure is suitable for providing air conditioning.

List of reference signs

10 refrigeration cycle device

11a, 11b connecting pipe

20 indoor machine

21 indoor heat exchanger

22 blower

22a blower fan

22b fan motor

23 outdoor heat exchanger

30 outer machine

31 compressor

31a suction pipe

31b discharge pipe

32 four way valve

33 outdoor heat exchanger

34 expansion valve

35 blower

35a blower fan

35b fan motor

35c fan motor support plate

36 refrigerant piping group

40 deck

41 top panel

42 side panel

43, 44 front panel

45 insertion hole

45a top edge

46 blow opening

47 fan guard

48 bell mouth

50 separation plate (separation)

51, 52 blow hole

53 blower

61 electronic component box (housing electronic components) 61a bottom edge

62 vent (first vent)

63 vent (second vent)

71 screen (second screen)

72 screen (first screen)

100 refrigeration cycle circuit

M machine chamber (first chamber)

F blow chamber (second chamber)

Claims (10)

Yo. Refrigeration cycle device (10) comprising: A cover (40) configuring an outer contour of an outdoor machine (30) has a first chamber (M) and a second chamber (F) formed therein, and an introduction hole (45) is formed for introducing outside air. in the first chamber (M); a partition (50) that separates the interior of the cover (40) in order to delimit the first chamber (M) and the second chamber (F); a refrigeration cycle circuit (100), of which at least a part is arranged in the first chamber (M), and through which combustible refrigerant circulates; a blower (35) arranged in the second chamber (F) which sends outside air introduced from the introduction hole (45) out through a blow hole (51) and out of the casing (40) from an opening of blown (46) formed in the second chamber (F); and a controller including a plurality of electronic components used to control the refrigeration cycle circuit (100) and the blower (35), and an electronic component housing (61) that houses the electronic components; wherein the electronic component housing (61) is arranged at an upper part within the first chamber (M), and the introduction hole (45) is formed at a lower position than the electronic component housing (61); a height of an upper edge (45a) of the introduction hole (45) has the same height as a height of a lower edge (61a) of the electronic component housing (61); characterized because the separation has formed in a lower part thereof the blow hole (51) that connects from the first chamber (M) to the second chamber (F); wherein a tubular bell mouth (48) is fixed on an inner side of the blow opening (46), and the blow hole (51) is covered by the bell mouth (48) so as not to be exposed from the blow opening (46). The refrigeration cycle device (10) according to claim 1, characterized in that the introduction hole (45) is formed at a higher position than a position where the blow hole (51) is formed. Refrigeration cycle device (10) according to claim 1 or 2, characterized in that The controller is arranged to control a blower fan (35a) of the blower (35) to rotate for a predetermined time before starting the operation of the refrigeration cycle circuit (100). 4. Refrigeration cycle device (10) according to any one of claims 1 to 3, characterized in that In the electronic component housing (61), a first vent (62) for internally introducing air and a second vent (63) for expelling the introduced air are formed. 5. Refrigeration cycle device (10) according to any one of claims 1 to 4, characterized in that the introduction hole (45) is formed based on an extinction distance of the refrigerant. Refrigeration cycle device (10) according to claim 5, characterized in that the introduction hole (45) comprises a plurality of holes with a cross section formed in a rectangular shape, and formed so that a short edge of the rectangular shape has a dimension less than or equal to an extinction distance of the refrigerant. 7. Refrigeration cycle device (10) according to claim 5 or 6, characterized in that in the introduction hole (45), a first screen (72) is provided, formed in order to cover an opening to prevent the ingress of water rain from outside in the first chamber (M). 8. Refrigeration cycle device (10) according to any one of claims 1 to 7, characterized in that the blow hole (51) is formed based on an extinction distance of the refrigerant. Refrigeration cycle device (10) according to claim 8, characterized in that the blow hole (51) comprises a plurality of holes with a rectangular cross section, and formed so that a short edge of the shape rectangular has a dimension less than or equal to an extinction distance of the refrigerant. Refrigeration cycle device (10) according to claim 8 or 9, characterized in that in the blow hole (51), a second screen (71) is provided, formed in order to cover an opening to prevent the ingress of rainwater from the second chamber (F) into the first chamber (M).