JP3395761B2 - Throttling device, refrigeration cycle device. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle device having a simple structure, high reliability, and low noise for reducing fluid noise, and a refrigeration cycle device using the throttle device.

[0002]

2. Description of the Related Art In a conventional air conditioner, a variable capacity compressor such as an inverter is used to cope with a change in air conditioning load, and the rotation frequency of the compressor is controlled according to the size of the air conditioning load. . However, when the rotation of the compressor is reduced during cooling operation, the evaporation temperature also rises and the dehumidifying capacity of the evaporator decreases, or the evaporation temperature rises above the dew point temperature in the room, making it impossible to dehumidify. .

The following air conditioner has been devised as a means for improving the dehumidifying ability during the cooling low capacity operation. FIG. 47 is a refrigerant circuit diagram of a conventional air conditioner disclosed in Japanese Patent Laid-Open No. 11-51514, for example.
8 is a cross-sectional view of a general expansion device provided in a general refrigerant circuit. In the figure, 1 is a compressor, 2 is a four-way valve,
3 is an outdoor heat exchanger, 4 is a first flow rate control device, 5 is a first indoor heat exchanger, 9 is a second flow rate control device, 8 is a second indoor heat exchanger, and these are sequentially connected by piping. It constitutes a refrigeration cycle. Reference numeral 26 is a two-way valve that constitutes the first flow rate control device 4, and 27 is a throttle device that constitutes the first flow rate control device 4.

Next, the operation of the conventional air conditioner will be described. In the cooling operation, the two-way valve 2 of the first flow control device 4
6 is closed, the refrigerant exiting the compressor 1 passes through the four-way valve 2, is condensed and liquefied in the outdoor heat exchanger 3, and cannot pass through the two-way valve 26. Therefore, the refrigerant passes through the expansion device 27 and is decompressed. It vaporizes in the indoor heat exchanger 5 and returns to the compressor 1 again via the four-way valve 2. Further, even in the heating operation, the first flow rate control device 4
Since the two-way valve 26 of No. 2 is closed, the refrigerant exiting the compressor 1 passes through the four-way valve 2, is condensed and liquefied in the indoor heat exchanger 5, and cannot pass through the two-way valve 26. After passing through and depressurized, it is evaporated and vaporized in the outdoor heat exchanger 3 and the four-way valve 2 is again used.
Return to compressor 1 via.

On the other hand, during the dehumidifying operation, the two-way valve 26 of the first flow rate control device 4 is opened and the main expansion device 27 is closed. In this case, by opening the two-way valve 26 and controlling the refrigerant flow rate by the second flow rate control valve 9, the first indoor heat exchanger 5 serves as a condenser, that is, a reheater, and the second indoor heat exchanger 8 Operates as an evaporator and the indoor air is heated by the first indoor heat exchanger 5, so that the dehumidifying operation with a small decrease in room temperature is possible.

[0006]

In the conventional air conditioner as described above, since a flow rate control valve having an orifice is usually used as the second flow rate control valve installed in the indoor unit, this orifice is used. The refrigerant flow noise generated when the refrigerant passed through was a factor that deteriorated the indoor environment. In particular, during the dehumidifying operation, the inlet of the second flow rate control valve becomes a gas-liquid two-phase refrigerant, which causes a problem that the refrigerant flow noise becomes loud.

As a measure for reducing the refrigerant flow noise of the second flow rate control valve during the dehumidifying operation, Japanese Patent Laid-Open No. 11-51514 and the like are disclosed. FIG. 48 is a sectional view of a conventional diaphragm device disclosed in Japanese Patent Laid-Open No. 11-51514. Figure 4
In FIG. 8, 13 is a refrigerant pipe, 30 is an electromagnetic coil for adjusting the amount of movement of the valve element 29, 31 is an opening of the refrigerant pipe 13,
28 is a plurality of cut grooves provided in the opening 31;
Is a valve body, and the movement of the valve body 29 causes the plurality of cut grooves 28 to function as orifice-shaped throttle channels.

However, in this refrigerant flow noise reduction measure, the throttle portion is devised so that the gas-liquid two-phase refrigerant continuously flows through a plurality of orifice-shaped passages. Has a limit (several to several tens), it is not effective and there is a problem that the refrigerant flow noise becomes loud.
As a result, additional measures such as providing a sound insulating material and a vibration damping material around the second flow rate control device are required, and there are problems such as an increase in cost, deterioration of installation property, and deterioration of recyclability.

On the other hand, in the flow rate control device used in the air conditioner disclosed in Japanese Unexamined Patent Publication No. 7-146032, a porous permeable material is provided to reduce refrigerant flow noise. FIG. 49 is a sectional view of the diaphragm device disclosed in Japanese Patent Laid-Open No. 7-146032, and shows an example in which a porous permeable material is provided as a filter on the upstream side and the downstream side of the diaphragm. In the figure, 31 is an orifice, 32 is a porous permeable material, 33 and 34 are throttle parts, and 30 is an electromagnetic coil part. In the figure, a porous permeable material 32 is provided before and after the orifice 31, and the refrigerant passes through the porous permeable material 32 to mix the gas phase and the liquid phase to reduce the flow noise. .

However, there is an orifice 31 between the narrowed portions (34, 33), and the gas that has passed through the porous permeable material 32 and the gas phase and the liquid phase are mixed to reduce the flow noise is before and after the passage of the orifice 31. Since the flow paths are complicated, the mixed state cannot be maintained and the gas phase and the liquid phase are separated again. For this reason, there is a problem in that the gas phase and the liquid phase cannot be continuously and effectively supplied to the throttle portion in a mixed state, and the refrigerant flow noise becomes loud.

FIG. 50 is a sectional view of a throttle device used in the air conditioner disclosed in Japanese Patent Laid-Open No. 11-325655. In the figure, 31 is an orifice, 41
Is a honeycomb pipe, 33 is a throttle part, and 30 is an electromagnetic coil part. In order to reduce the refrigerant flow noise, a honeycomb pipe 41 having a plurality of holes 42 communicating between the upstream and downstream sides of the throttle is provided as a sound deadening means. FIG. 51 is a sectional view of the honeycomb pipe 41. The plurality of holes 42 installed in the pipe have a small area through which the refrigerant can pass, are easily blocked by foreign substances flowing in the refrigeration cycle, and there is a problem that the performance is deteriorated due to a decrease in the refrigerant flow rate. Also, a plurality of holes 42 installed in the pipe
When the honeycomb pipe 41 having the above is provided, the structure becomes complicated and the cost also increases.

The present invention has been made to solve the above problems, and an object thereof is to obtain a low-noise diaphragm device. Another object of the present invention is to obtain a highly reliable diaphragm device free from foreign matter. Another object is to obtain a diaphragm device which is structurally simple and low in cost. Another object of the present invention is to obtain a diaphragm device which has good workability regardless of mounting direction. Moreover, it aims at obtaining a refrigeration cycle device with low noise and high reliability.

[0013]

According to a first aspect of the present invention, there is provided a main body having two spaces which are communicated with each other through a throttle passage and which are arranged on a substantially straight line with respect to a fluid flow direction. And two flow paths that respectively connect two spaces inside the main body to the outside of the main body, and two flow paths that are fixed to the inside of the main body so as to be arranged substantially linearly with respect to the two spaces inside the main body. A porous permeable material provided so as to partition at least one of the spaces into a throttle passage side and a flow passage side.

According to a second aspect of the present invention, a main body having two spaces which are communicated with each other through a throttle passage and which are arranged on a substantially straight line with respect to a fluid flow direction, and
At least one of the two spaces is provided so that the fluid passes in the flow direction of the fluid, and at least 1
A porous permeable material that partitions the two spaces into a space on the side opposite to the throttle passage and a space on the opposite side; and a positioning protrusion provided between the porous permeable material and the throttle passage for positioning the porous permeable material in the fluid flow direction. Positioning the porous permeable material with a holding part provided with a flow path provided to communicate the space on the opposite side with the outside and holding the porous permeable material from the opposite side of the throttle passage. The projections are brought into contact with each other for positioning.

The invention according to claim 3 of the present invention is such that a gap is provided between the throttle passage and the porous permeable material.

According to a fourth aspect of the present invention, the throttle portion and the porous permeable material are integrally formed, and the throttle passage is fixed to the inside of the main body so as to divide the inside of the main body into two spaces. Is.

Further, according to a fifth aspect of the present invention, a through hole having a diameter larger than the diameter of the throttle passage is formed in the portion of the porous permeable material at a portion deviated from the position on the axial line with respect to the flow direction of the throttle passage. Is provided.

Further, according to a sixth aspect of the present invention, the ventilation hole of the porous permeable material is provided at a portion between the throttle passage and the porous permeable material or at a portion between the porous permeable material and the flow path. A filter having a mesh smaller than the diameter is provided.

In the invention according to claim 7 of the present invention, two or more flow paths are provided for one space.

Further, in the invention according to claim 8 of the present invention, the take-out direction of the flow path is substantially parallel to or perpendicular to the flow direction of the fluid in the main body with respect to one space. .

[0021] According to a ninth aspect of the present invention, there is provided a main body having two spaces which are communicated with each other through a throttle passage and which are arranged substantially linearly with respect to a flow direction of the refrigerant, and a main body of the main body. Two flow paths that respectively connect the two internal spaces to the outside of the main body, and the inside of the main body are fixed so as to be arranged substantially linearly with respect to the two internal spaces of the main body. A throttling device having a porous permeable material provided so as to partition one space into a throttle passage side and a flow passage side is arranged in a refrigerant circuit inside or outside a heat exchanger constituting a refrigeration cycle and indoors. It was done.

The invention according to claim 10 of the present invention is
A main body having two spaces that are communicated with each other through a throttle passage and that are arranged substantially linearly with respect to the flow direction of the refrigerant;
A porous permeable material that is provided so that the refrigerant passes in the direction of flow of the refrigerant in at least one of the two spaces and that partitions the at least one space into a throttle passage side space and an opposite side space; A positioning protrusion that is provided between the permeable material and the throttle passage and forms a gap between the porous permeable material and the throttle passage, and a flow passage that is provided so that the opposite space communicates with the outside, A throttling device provided with a pressing component provided to press the porous permeable material from the opposite side of the throttling passage to the positioning protrusion, in a refrigerant circuit inside or outside a heat exchanger that constitutes a refrigeration cycle, and indoors. It is arranged.

The invention according to claim 11 of the present invention is
An indoor unit having a heat exchanger arranged in the housing for exchanging heat in the room, and a control device arranged in the housing on the side of the heat exchanger, the heat exchanger and the control device. A diaphragm device is arranged between them.

The invention according to claim 12 of the present invention is
An indoor unit having a heat exchanger arranged in a housing for exchanging heat of indoor air is provided, and a diaphragm device is arranged between the housing and the heat exchanger.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a refrigerant circuit diagram of an air conditioner that is a refrigeration cycle device showing an example of a first embodiment of the present invention. In the figure, 1 is a compressor, 2 is a flow path switching means such as a four-way valve for switching the flow of refrigerant in cooling operation and heating operation, 3 is an outdoor heat exchanger, 4 is a first flow rate control device, and 5 is a first An indoor heat exchanger, 9 is a second flow rate control device composed of a throttle device 6 and a two-way valve 7, 8 is a second indoor heat exchanger, and these are sequentially connected by piping to form a refrigeration cycle. . A refrigerant is used as the fluid that circulates in the refrigeration cycle, R410A, which is a mixed refrigerant of R32 and R125, and the like are used as the refrigerant, and alkylbenzene-based oil is used as the refrigerating machine oil.

FIG. 2 shows the second flow control device 9 of the air conditioner.
7 is a cross-sectional view of FIG. 7, in which 7 is a two-way valve, and 6 is a throttle device connected to a pipe 116 serving as a bypass flow path that bypasses the two-way valve 7. FIG. 3 is a cross-sectional view of a diaphragm device according to the present embodiment. In the figure, 10 is a porous permeable material, 11 is a cylindrical shape, a polygonal shape or a disk provided with a small diameter through hole 11a serving as an orifice. Body such as a shape, 12
Is a pressing component that is inserted into the main body 11 and has a flow path (for example, piping) that connects the internal space 12a and the outside. In the porous permeable material 10, the average diameter of the vent holes (the surface of the porous body through which the fluid (refrigerant) can pass and the pores inside) is 100 to 5.
It is a foam metal having a porosity of 92 ± 6% at 00 μm.

Since the pipe 13, which is a flow path, is arranged linearly with respect to the flow direction of the refrigerant in the main body 11, there is no great resistance to the passage between the porous permeable material 10 and the orifice 11a. . Further, in the main body 11, the orifice 11 in the flow direction is formed so that a predetermined gap 11c is formed between the orifice 11a which is a throttle passage and the porous permeable material 10.
Ring-shaped positioning protrusions 11b are provided before and after a. The presence of this predetermined gap 11c makes it possible to effectively use the passage area of the fluid (refrigerant) passing through the porous permeable material 10 effectively. Therefore, even if foreign matter is mixed into the fluid (refrigerant), the blocking resistance against the foreign matter is improved. improves. Also,
Due to the presence of the positioning protrusion 11b, the porous permeable material 1
The positioning of 0 and the pressing component 12 can be performed easily and surely, and the assembling property is also improved.

The inner diameter of the ring-shaped positioning protrusion 11b is 1
It is set to 0 mm to 20 mm. Also, the orifice 1
The inner diameter of 1a is 0.5 mm to 2 mm, and the orifice 1
The length of 1a is 1 mm to 4 mm, and the size is determined within the above size range depending on the required throttle amount of the fluid (refrigerant).
Further, the protrusion amount of the positioning protrusion 11b is set so that the gap 11c between the porous permeable material 10 and the orifice 11a is within a range of 5 mm or less. In the experiment, the noise reduction effect was obtained when set within the above range.

The porous permeable material 10 has positioning protrusions 11b.
Is contacted with and positioned in the flow direction of the fluid (refrigerant). Further, the porous permeable material 10 has an orifice 11a.
Holding part 1 having a flow path 13 from the surface opposite to the side surface
By 2 it is fixed in a state of being pressed to the side of the positioning protrusion 11b. The holding component 12 has a space 12a having an inner diameter equal to or larger than the inner diameter of the flow path 13 and a predetermined length, and is inserted and joined to the main body 11 also for fixing the porous permeable material 10. The porous permeable material 10 uses a foam metal made of Ni, Ni—Cr, or stainless steel having an average diameter of the ventilation holes of 100 μm to 500 μm and a thickness of about 1 mm to 10 mm. The main body 11 and the pressing component 12 are made of metal such as copper, brass, aluminum and stainless steel by cutting or forging.

In FIG. 2, the flow direction of the fluid (refrigerant) during cooling is indicated by a solid arrow, and the flow direction of the fluid (refrigerant) during heating is indicated by a broken arrow. Open the two-way valve 7 [(a)
State), almost no fluid (refrigerant) flows through the expansion device 6, and the pipe 16 connected to the first indoor heat exchanger 5
The pipe 17 connected to the second indoor heat exchanger 8 can be connected with almost no pressure loss. When the two-way valve 7 is closed [(b) state], the first indoor heat exchanger 5
A fluid (refrigerant) passes through the bypass pipe 116 from the pipe 16 connected to the second indoor heat exchanger 8 through the pipe 17 connected to the second indoor heat exchanger 8. Reach

Next, the operation of the refrigeration cycle apparatus according to this embodiment will be described. In the case of cooling operation, the air conditioning sensible heat load and the latent heat load of the room are both large at startup and during the summer, and the dehumidification operation where the air conditioning sensible heat load is small but the latent heat load is large, such as in the middle period and rainy season. It is divided into In the normal cooling operation, the two-way valve 7 of the second flow rate control device 9 is opened, and the pipe 16 connected to the second flow rate control device and the first indoor heat exchanger 5 and the second indoor heat exchanger 8 are connected. Piping 1
Connect 7 with almost no pressure loss.

At this time, the high-temperature and high-pressure vapor refrigerant leaving the compressor 1 operating at the number of revolutions corresponding to the air conditioning load is the four-way valve 2.
Through the outdoor heat exchanger 3, condensed and liquefied in the outdoor heat exchanger 3, reduced in pressure by the first flow rate control device 4 to become a low-pressure two-phase refrigerant, flown into the first indoor heat exchanger 5 and evaporated and vaporized, and then the second flow rate control device After passing through 9 without a large pressure loss, it vaporizes again in the second indoor heat exchanger 8 to become a low-pressure vapor refrigerant and returns to the compressor 1 again via the four-way valve 2.

Since the two-way valve 7 of the second flow rate control device 9 is opened, the refrigerant passing through the second flow rate control device has almost no pressure loss, and the cooling capacity and efficiency are not deteriorated. The first flow rate control device is controlled so that the degree of superheat of the refrigerant in the suction portion of the compressor 1 becomes 10 ° C, for example. In such a refrigeration cycle, the refrigerant is evaporated in the indoor heat exchangers 5 and 8 to take heat from the room, and the refrigerant is condensed in the outdoor heat exchanger 3 to release the heat taken indoors to the outside. Cool the room.

Next, the operation during the dehumidifying operation will be described with reference to FIG. Figure 4 is a pressure-enthalpy diagram,
The horizontal axis represents enthalpy and the vertical axis represents pressure.
The symbols A to F in the figure are added to explain the state at each position of the refrigeration cycle. Note that A to F shown in FIG. 4 correspond to A to F shown in FIG. During the dehumidifying operation, the two-way valve 7 of the second flow rate control device 9 is closed by a control unit (not shown) so that the refrigerant flows only through the expansion device 6.

At this time, the high-temperature and high-pressure vapor refrigerant (point A) exiting the compressor 1 operating at the number of revolutions corresponding to the air conditioning load passes through the four-way valve 2 and is exchanged with the outside air by the outdoor heat exchanger 3. It heat-exchanges and condenses to become a gas-liquid two-phase refrigerant (point B). This high-pressure two-phase refrigerant is slightly decompressed by the first flow rate control device 4, becomes an intermediate-pressure gas-liquid two-phase refrigerant, and flows into the first indoor heat exchanger 5 (C
point). The intermediate-pressure gas-liquid two-phase refrigerant that has flowed into the first indoor heat exchanger exchanges heat with the indoor air and is further condensed (D
point). The gas-liquid two-phase refrigerant flowing out of the first indoor heat exchanger is the second
It flows into the flow control device 9.

In the second flow rate control device 9, the refrigerant is decompressed by passing through the orifice 11a of the throttle portion 6 to become a low pressure gas-liquid two-phase refrigerant and flows into the second indoor heat exchanger 8 (E
point). The refrigerant flowing into the second indoor heat exchanger 8 takes away the sensible heat and latent heat of the indoor air and evaporates. The low-pressure vapor refrigerant leaving the second indoor heat exchanger 8 is again passed through the four-way valve 2 to the compressor 1
Return to. The indoor air is heated by the first indoor heat exchanger 5,
Since it is cooled and dehumidified in the second indoor heat exchanger 8, it is possible to perform dehumidification while preventing the room temperature of the room from decreasing.

In the dehumidifying operation, the rotation frequency of the compressor 1 and the fan rotation speed of the outdoor heat exchanger 3 are adjusted to control the heat exchange amount of the outdoor heat exchanger 3 to control the first indoor heat exchanger. 5
The blowout temperature can be controlled in a wide range by controlling the amount of heating of the indoor air by. Further, the opening degree of the first flow rate control device 4 and the indoor fan rotation speed are controlled to control the condensing temperature of the first indoor heat exchanger 5, and the heating amount of the indoor air by the first indoor heat exchanger 5 is controlled. You can also The second flow rate control device 9 is controlled so that the superheat degree of the refrigerant sucked into the compressor becomes 10 ° C, for example.

At this time, noise is generated when the gas-liquid two-phase refrigerant passes through the orifice 11a, but when the gas-liquid two-phase refrigerant passes because of the porous permeable material 10 at the inlet and outlet sides of the orifice 11a. It is possible to significantly reduce the refrigerant flow noise generated at the time. When the gas-liquid two-phase refrigerant passes through the normal orifice type flow rate control device, a large refrigerant flow noise is generated before and after the throttle portion. In particular, when the gas-liquid two-phase refrigerant flow mode is a slag flow, a large refrigerant flow noise is generated upstream of the throttle portion.

The cause will be described with reference to FIG. FIG. 5 is a diagram illustrating the flow state of the refrigerant at the inlet of the expansion device.
When the flow state of the gas-liquid two-phase refrigerant is a slag (large bubble) flow, the vapor refrigerant flows intermittently in the flow direction as shown in FIG. When the steam slag or steam bubbles upstream of the throttle passage are collapsed when passing through the throttle passage, they vibrate and generate noise. Further, although the vapor refrigerant and the liquid refrigerant alternately pass through the throttle portion, the speed of the refrigerant is high when the vapor refrigerant passes and slows when the liquid refrigerant passes, so that the pressure upstream of the throttle portion also increases accordingly. fluctuate. Further, at the outlet of the conventional second flow rate control device 9, the number of outlet flow paths is 1 to 4, so that the refrigerant flow velocity is high,
A high-speed gas-liquid two-phase flow is generated at the outlet portion, and the refrigerant collides with the wall surface, so that the throttle body and the outlet passage constantly vibrate and generate noise. In addition, jet noise is increased due to turbulence and eddies generated by the high-speed gas-liquid two-phase jet at the outlet.

The gas-liquid two-phase refrigerant and the liquid refrigerant flowing into the throttle portion 6 of the second flow rate control device 9 shown in FIGS. 2 and 3 flow through the minute and innumerable ventilation holes of the inlet side porous permeable material 10. Is rectified. Therefore, vapor slag (large bubbles) such as slag flow in which gas and liquid flow intermittently becomes small bubbles, and the flow state of the refrigerant becomes a homogeneous gas-liquid two-phase flow (a state in which the vapor refrigerant and the liquid refrigerant are well mixed). Therefore, since the vapor refrigerant and the liquid refrigerant pass through the orifice 11a at the same time, the speed of the refrigerant does not change and the pressure does not change.

In addition, the inlet side porous permeable material 10 has a complicated internal flow passage, and the pressure fluctuation is repeated in this inside so that there is an effect of making the pressure fluctuation constant while partially converting it into heat energy. Even if a pressure fluctuation occurs in the orifice 11a, it has an effect of absorbing the pressure fluctuation, and it is difficult to convey the influence upstream. Further, the high-speed gas-liquid two-phase jet downstream of the orifice 11a is sufficiently decelerated by the outlet-side porous permeable material 10 in the flow velocity of the refrigerant therein and the velocity distribution is uniformized. Since the jet flow does not collide with the wall surface and no large vortex is generated in the flow, jet noise is reduced.

Furthermore, since the inlet internal space 12a is provided on the inlet side of the throttle portion 6, it is possible to reduce pressure fluctuations at a low frequency which cannot be suppressed by the inlet side porous permeable material 10 and to act as a sound deadening space. It is possible. Similarly, since the outlet internal space 12a is also provided on the outlet side of the throttle portion 9, it is possible to reduce pressure fluctuations at low frequencies that cannot be suppressed by the outlet-side porous permeable material 10 and to act as a sound deadening space. . In addition, the porous permeable material 10 is the main body 11
It is arranged at a position on a substantially straight line with respect to the inlet internal space 12a and the outlet internal space 12a, which are arranged substantially linearly with respect to the refrigerant flow direction therein. Therefore, the flow path to the porous permeable material 10 and the throttle passage 11a is substantially linear, and the structure is simple and the resistance is small. The flow state becomes a homogeneous gas-liquid two-phase flow (a state in which the vapor refrigerant and the liquid refrigerant are well mixed), and the refrigerant maintains this homogeneous gas-liquid two-phase flow (a state in which the vapor refrigerant and the liquid refrigerant are well mixed). Since it can pass through the throttle passage (orifice) 11a in this state, the speed of the refrigerant does not fluctuate, the pressure does not fluctuate, and noise hardly occurs.

Therefore, it is not necessary to take a measure such as winding a sound insulating material or a vibration damping material around the expansion device 6, which is required in the conventional device, and the cost is reduced, and the recyclability of the refrigeration cycle device is improved. Note that the problem of the refrigerant flow noise caused by the gas-liquid two-phase refrigerant described above is not limited to the air conditioner, but is a problem for a device that constitutes a refrigeration cycle such as a refrigerator, and the throttle of the present embodiment. The same effect can be obtained by widely applying the device to such a refrigeration cycle device in general.

If the fixing of the porous permeable material 10 is insufficient, the porous permeable material may come out of position during operation of the refrigeration cycle apparatus, and the noise reduction effect may be lost. In the embodiment, since the positioning protrusion 11b of the main body 11 and the pressing member 12 are fixedly joined to each other so as to sandwich the porous permeable material, the porous permeable material 10 can be stably operated without being displaced or displaced from the fixed position. The device can be obtained.

Further, the porous permeable material 10 is attached to the positioning protrusion 1
The porous permeable material 10 is assembled so that it is brought into contact with 1a, and then the porous permeable material 10 is pressed by the pressing component 12 so as to be sandwiched between it and the positioning protrusion 11b. At this time, the pressing component 12 is fixed to the main body 11 by press fitting, shrink fitting, welding or the like. Therefore, since the porous permeable material 10 can be easily and surely positioned at the time of assembling, it is possible to obtain a low-cost throttling device in which the assembling time is shortened and the reliability is improved. Moreover, since the structure is simple, a low-cost diaphragm device can be obtained. In addition, it is possible to obtain a low-cost refrigeration cycle apparatus, which does not require measures such as winding a sound insulating material or a vibration damping material around the diaphragm device, which is required in the conventional device.

The problem of foreign matter in the refrigerant circuit is also 100 μm to 500 μm, which is larger than that of a filter used in a general refrigerant circuit (generally, the diameter of the air holes is about 100 μm). By doing so, stable operation can be performed without clogging, so that a highly reliable diaphragm device can be obtained.

FIGS. 6 and 7 are front views of the refrigeration cycle apparatus, for example, an indoor unit of an air conditioner with the front cover removed, where 6 is a throttle device, 25 is a heat exchanger, 24 is a control device, and 23. Is a fan motor, 38 is a housing of the indoor unit, and FIGS. 8, 9, and 10 are cross-sectional views of the indoor unit of the air conditioner.

In the figure, 6 is a throttle device, 25 is a heat exchanger, 39 is a blower fan, and 38 is a housing of an indoor unit.
When the expansion device described in the first embodiment is installed in the indoor unit, it should be installed in the space between the heat exchanger 25, the fan motor 23, and the control device 24 at the front position of the housing as shown in FIG. At the position on the cross-section of the case, the front side as shown in FIG. 8, the upper part of the case as shown in FIG. 9, and the rear side of the case as shown in FIG. Because it is a noise, it can be installed anywhere without sound insulation as long as there is space. Further, as shown in FIG. 7, it can be installed in the space between the heat exchanger 25 and the housing. The position can be set at the same position as above

Further, since the diaphragm of the first embodiment has low noise, no sound absorbing material is required, and the diaphragm can be installed in any other open space of the indoor unit of the refrigeration cycle apparatus. In addition, the installation direction of the expansion device is horizontal to the flow of fluid (refrigerant),
Any installation direction such as a substantially right angle or an angle may be used. Also a right angle,
In the case of oblique installation, the fluid (refrigerant) may flow from either the bottom to the top or the top to the bottom.

Alternatively, the holding component 112 shown in FIG. 11 may be used. FIG. 11 is a cross-sectional view of a diaphragm device showing another example of the first embodiment. In the figure, reference numeral 112 is a pressing component, and the pipe connecting portion is burring processed, and is manufactured by press molding or drawing. By burring the connecting portion of the connecting pipe 13 of the pressing component 112, the pressing component 112 can be easily produced by a press or the like, so that a low-cost expansion device can be obtained.

12 and 13 are cross-sectional views of a diaphragm device showing another example of the first embodiment. Figure 1
In FIG. 2, 122 is a pressing component, and the pipes 13A, 13B, and 13C that are flow paths are connected substantially parallel to the flow direction of the main body 11. Further, in FIG. 13, the pipes 13A, 13B, 13C and 13D, which are the flow paths, are connected substantially parallel to the flow direction of the main body 11. In the above-described pressing parts 12 and 112, the connection pipe 13 has one inlet and one outlet, but two inlets and one outlet as shown in FIG. 12, and two inlets and two outlets as shown in FIG. But it is okay.

The pipes 13A to 13D are holding parts 122.
Is connected to the space 12a inside the main body 11 substantially parallel to the flow direction of the fluid (refrigerant), and the throttle passage 11a and the pipe 13A are connected.
13D are in communication with each other. Further, the connection pipes may be connected to the inlet and the outlet from a plurality of two or more locations. Further, the porous permeable material 10 is sandwiched between the pressing component 14 and the positioning protrusion 11b, and is pressed and fixed to the main body 11 by the pressing component 14 in the flow direction of the fluid (refrigerant) in the main body. With the above-mentioned configuration, even if the heat exchanger has a plurality of inlets and outlets, the heat exchanger can be directly connected to the expansion device 6, so it is not necessary to purposely combine them into one.
Processing and assembly time can be shortened.

The porous permeable material 10 is not limited to a foam metal, but is also a porous permeable material made of sintered metal obtained by sintering a metal powder, or ceramics, wire mesh, several wire meshes, or several wire meshes. The same effect can be obtained with a sintered wire net and a laminated wire net that are stacked and sintered.

The porous permeable material 10 is not in the shape of a disc,
The same effect can be obtained with a polygonal shape. Along with that, the same effect can be obtained even if the main body 11 and the pressing parts 12, 112, 122 are not cylindrical but have a polygonal tubular shape. In addition, in the present embodiment, the orifice 11a and the porous permeable material 10 are
Although the predetermined gap 11c is provided between the two, the predetermined gap 11c may be omitted. FIG. 14 shows a predetermined gap 11c
It is a sectional view showing an example of a diaphragm device when not providing.
If there is no predetermined gap (predetermined gap 11c described with reference to FIG. 3) between the orifice 11a and the porous permeable material 10 as shown in FIG. 14, it is not necessary to provide the positioning protrusion 11b, so a low cost diaphragm device. Can be obtained. Further, although the case where the expansion device 6 is applied to the second flow rate control device has been described in the present embodiment, it is needless to say that the same effect can be obtained even when applied to the first flow rate control device.

Embodiment 2. 15, FIG. 16, FIG.
FIG. 18 is a sectional view of a diaphragm device representing the second embodiment.
The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In FIG. 15, 10 is a porous permeable material, 11 is a disk-shaped or columnar main body having a small-diameter through hole that is an orifice, and 14 is the main body 11 in the flow direction of the fluid (refrigerant) in the main body 11. More inserted, internal space 14
It is a pressing component having a and 14b and a flow path (for example, pipe) 13 that communicates the internal space 14b with the outside. The pipe 13 which is a flow path has a space 14b inside the pressing member 14 from a direction substantially perpendicular to the flow direction of the fluid (refrigerant) in the main body 11.
The orifice 11a is configured to communicate with the outside by being connected to.

The orifice 11a has an inner diameter of 0.5 m.
In the range of m to 2 mm and the length of 1 mm to 4 mm, the dimension is determined by the necessary drawing amount. The body 11 has an orifice 11a and the porous permeable material 10 has a predetermined gap 11
For example, a ring-shaped positioning protrusion 11b is provided in the flow direction of the fluid (refrigerant) in the main body 11 so as to generate c. The presence of this predetermined gap 11c makes it possible to effectively use the passage area of the fluid (refrigerant) passing through the porous permeable material 10 effectively. Therefore, even if foreign matter is mixed into the fluid (refrigerant), the blocking resistance against the foreign matter is improved. improves. Further, since the positioning protrusion 11b is provided, the porous permeable material 10
And the positioning of the pressing part 12 can be performed easily and securely,
Assembling is also improved. Further, it is not necessary to separately provide a filter in the refrigerant circuit, and a refrigeration cycle device having low cost and high reliability can be obtained.

The inner diameter of the ring-shaped positioning protrusion 11b is 1
The height of the positioning protrusion 11b is set to 0 mm to 20 mm, and the gap 11c between the porous permeable material 10 and the orifice 11a is 5 mm or less. In addition, the porous permeable material 10 is positioned by the pressing component 14 inserted into the main body 11 in the flow direction of the fluid (refrigerant).
It is pressed down while being sandwiched by 1b and is inserted and fixed to the main body 11. Porous permeable material 10 has a vent hole diameter of 1
The thickness is from 00 μm to 500 μm and the thickness is from 1 mm to 1
A metal foam made of Ni, Ni-Cr, or stainless steel having a thickness of 0 mm is used. Also the main body 1
1. The pressing component 14 is made of metal such as copper, brass, aluminum, and stainless by cutting or forging.

Further, as shown in FIG. 16, the internal space 1
4b may be omitted. In the figure, reference numeral 114 denotes a holding component, which has a structure in which the pipe 13 that is a flow path directly communicates with the internal space 14a, and it is not necessary to provide the internal space 14a as shown in FIG. It is possible to shorten the processing time and obtain a low-cost diaphragm device. Alternatively, the flow path may be burred as shown in FIG. In the figure, reference numeral 124 is a pressing component, and the connecting portion of the pipe 13 that is a flow path is burred.

Therefore, since the pressing member 124 can be easily manufactured by a press or the like, a low-cost squeezing device can be obtained. Further, in FIG. 18, reference numeral 134 is a pressing component to which the pipe 13 which is a flow path is connected, and 15 is a lid. As shown in the figure, hold down the tubular pipe part 1
Since the lid 15 has a structure in which the lid 15 is joined, a commercially available pipe can be used and a low-cost expansion device can be obtained. Also, the same effect can be obtained by providing the pipe 13 on the lid 15.

Further, in this embodiment, each of the flow passages has one inlet and one outlet, but a plurality of flow passages may be provided as shown in FIGS. 19 and 20. 19 and 20 are cross-sectional views of a diaphragm device representing another example of the second embodiment. In FIG. 19, 13A, 13B, 13C, and 13D are pipes that are flow paths, and 14 is a pressing component to which the pipes 13A to 13D are connected. The pipes 13A to 13D are connected to the space 14b inside the holding component 14 at substantially right angles to the flow direction of the fluid (refrigerant) in the main body 11, and the throttle passage 11a and the pipes 13A to 13D communicate with each other.

Further, the porous permeable material 10 is used as the pressing member 14
It is sandwiched between the positioning protrusion 11b and
It is pressed and fixed to the main body 11 by 4 in the flow direction of the fluid (refrigerant) in the main body. In addition, although the number of the pipes 13 is four in FIG. 20, as shown in FIG.
There may be three of D. With the above configuration, even if the heat exchanger has a plurality of inlets and outlets, they can be directly connected to the expansion device 6, so that it is not necessary to purposely combine them into one, and processing and assembly time can be shortened.

The porous permeable material 10 is not limited to a foam metal, but is also a porous permeable material of sintered metal obtained by sintering metal powder, or ceramics, wire mesh, several wire meshes, or several wire meshes. The same effect can be obtained with a sintered wire net and a laminated wire net that are stacked and sintered.

Further, the porous permeable material 10 does not have to be disk-shaped, and the same effect can be obtained even if it has a polygonal shape. Further, the pressing member 14 may have a polygonal tubular shape instead of the cylindrical shape to obtain the same effect.

Third Embodiment 21, 22, 23,
FIG. 24 is a cross-sectional view of the diaphragm device according to the third embodiment, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In FIG. 21, 10 is a porous permeable material, 11 is a cylindrical main body integrated with a disk-shaped plate having a throttle passage 11a that is an orifice, and 12 is a pressing member inserted in the main body 11. The pipe 13E, which is a passage, is substantially parallel to the flow direction of the fluid (refrigerant) in the main body 11 to the holding component 12, and the pipe 13F is substantially perpendicular to the flow direction of the fluid (refrigerant) in the main body 11 to the holding component 14. It is connected.

The main body 11 is provided with ring-shaped positioning projections 11b before and after the orifice 11a in the flow direction so that a predetermined gap 11c is formed between the orifice 11a and the porous permeable material 10. Ring-shaped positioning protrusion 1
The inner diameter of 1b is set to 10 mm to 20 mm. Further, the inner diameter of the orifice 11a is 0.5 mm to 2 mm, the length of the orifice 11a is 1 mm to 4 mm,
The size is determined within the above size range depending on the required throttle amount of the fluid (refrigerant). In addition, the porous permeable material 10 and the ORIFUS 1
The protrusion amount of the positioning protrusion 11b is set so that the gap 11c of 1a is within a range of 5 mm or less. In the experiment,
When set within the above range, the noise reduction effect was obtained.

The porous permeable material 10 has positioning protrusions 11b.
Is contacted with and positioned in the flow direction of the fluid (refrigerant). Further, the porous permeable material 10 has an orifice 11a.
Holding part 1 having a flow path 13 from the surface opposite to the side surface
It is fixed in a state of being pressed to the side of the positioning protrusion 11b by the members 2 and 14. The holding parts 12 and 14 are the space 1 having an inner diameter larger than the inner diameter of the flow path 13 and a predetermined length.
2a, the porous permeable material 10 is also fixed and inserted into the main body 11 and joined. The porous permeable material 10 is made of Ni or Ni having an average diameter of air holes of 100 μm to 500 μm and a thickness of about 1 mm to 10 mm.
-A foam metal made of Cr or stainless steel is used. The main body 11 and the pressing component 12 are made of metal such as copper, brass, aluminum and stainless steel by cutting or forging.

Further, as shown in FIG. 21, the internal space 1
4b may be omitted as shown in FIG. In FIG. 22,
Reference numeral 114 denotes a pressing component, which has a structure in which the pipe 13 that is a flow path directly communicates with the internal space 14a.
Since it is not necessary to provide the internal space 14a as in No. 1, processing time can be shortened and a low-cost diaphragm device can be obtained. Further, the pressing parts 112 and 124 shown in FIG. 23 may be used. In the figure, 112, 124
Is a pressing part, and the pipe connection part is burring processed, and is manufactured by press molding or drawing.
By burring the connecting portions of the connecting pipes 13 of the pressing parts 112, 124, the pressing parts 112, 1
Since 24 can be easily produced by a press or the like, a low-cost squeezing device can be obtained.

Further, in FIG. 24, 112 is a pressing member in which the pipe 13 which is a flow path is connected substantially parallel to the flow direction of the main body, and 134 is the pipe part 13 which is a flow path is connected at a substantially right angle to the flow direction of the main body. It is a holding part, and 15 is a lid. As shown in the figure, since the lid 15 is joined to the pressing member 134 formed by a tubular pipe or the like, a commercially available pipe can be diverted and a low-cost expansion device can be obtained. Also, the same effect can be obtained by providing the pipe 13 on the lid 15.

In this embodiment, there are one inlet (1 point) and one outlet (1 point) for the fluid (refrigerant) to the expansion device 6.
6, there may be a plurality of inlets and outlets.
25, 26, and 27 are cross-sectional views of a diaphragm device representing another example of the third embodiment, and the same parts as those in the first and second embodiments are designated by the same reference numerals and their description will be omitted. Omit it.
In FIG. 25, 13A, 13B, 13C and 13D are pipes which are flow paths, 12 is a holding component to which the pipes 13A and 13b are connected, and 14 is a holding component to which the pipe 13C13D is connected. The pipes 13A and 13B are connected to the space 12a inside the holding component 12 substantially in parallel to the flow direction of the fluid (refrigerant) inside the body 11, and the pipes 13C and 13D are inside the space 11b inside the holding component 14 inside the body 11. The flow passage of the fluid (refrigerant) is connected at substantially right angles, and the throttle passage 11
a and the pipes 13A to 13D communicate with each other.

Further, the porous permeable material 10 is the pressing component 1
It is sandwiched between 2 and 14 and the positioning protrusion 11b, and is pressed and fixed to the main body 11 in the flow direction of the fluid (refrigerant) in the main body 11 by the pressing parts 12 and 14. Also, FIG.
No. 5 had four pipes 13, but as shown in FIG.
3A, 13B, 13D and 13 as shown in FIG.
There may be three of A, 13C and 13D. With the above configuration, even if the heat exchanger has a plurality of inlets and outlets, the heat exchanger can be directly connected to the expansion device 6, so that it is not necessary.
It is not necessary to put them together in a book, and processing and assembly time can be shortened.

The porous permeable material 10 is not limited to foam metal, but is also a porous permeable material of sintered metal or ceramics obtained by sintering metal powder, or wire mesh, several wire meshes, or several wire meshes. The same effect can be obtained with a sintered wire net and a laminated wire net that are stacked and sintered.

Further, the porous permeable material 10 does not have to be disk-shaped, and the same effect can be obtained even if it has a polygonal shape. Further, the pressing parts 12, 14 and the main body 11 may have a polygonal tubular shape instead of a cylindrical shape to obtain the same effect.

Further, as described in the first to third embodiments, the take-out direction of the flow path 13 communicating with the two spaces 12a, 12a is relative to the flow direction of the fluid (refrigerant) in the main body 11. Since it can be taken out from almost any direction such as approximately parallel or approximately right angle, when assembling to any device such as a refrigeration cycle device, it is not necessary to bend the assembly pipe, it can be easily assembled and the assembly time is shortened. it can.

Fourth Embodiment 28 and 29 are cross-sectional views of the expansion device showing the fourth embodiment, and are connected to the same refrigerant circuit as described in the first embodiment. In the figure, 10 is a porous permeable material, and 18 is, for example, a cylindrical orifice component having a throttle passage 18a serving as an orifice. The porous permeable material 10 is inserted and fixed on both sides of the throttle passage 18a by press fitting or caulking. Has been done. The orifice 18a has an inner diameter of 0.5 mm to 2 mm and a length of 1 mm to 4
In the range of mm, the size is determined according to the required drawing amount.

The orifice 18a and the porous permeable material 10
The orifice part 18 is provided in the orifice component 18 in the flow direction of the fluid (refrigerant) so that a predetermined gap 18c is formed between
For example, a ring-shaped positioning protrusion 18b is provided before and after. The positioning protrusion 18b has an inner diameter of 10 mm to 20
The height of the positioning protrusion 18b is set so that the gap 18c between the porous permeable material 10 and the orifice 18a is 5 mm or less. The orifice component 18 to which the porous permeable material 10 is integrally fixed is fixed to, for example, a pipe-shaped main body 19 by press fitting or shrink fitting, and divides the inside into two spaces 19a, 19a. The ring-shaped positioning protrusion 18b may be integrated with the orifice component 18 or may be a separate member. Therefore, the orifice 18
Since the main body can be assembled in a state where the a and the porous permeable material 10 are preassembled, the assembling property is improved and a highly reliable diaphragm device can be obtained.

After the orifice component 18 is inserted and fixed in the main body 19, both ends thereof are drawn to form a flow path, and the pipe 13 is connected to the flow path substantially parallel to the flow direction of the fluid (refrigerant). is doing. At that time, the porous permeable material 10 and the pipe 1
The space up to 3 has a predetermined distance and a predetermined inner diameter.
The porous permeable material 10 has a vent hole diameter of 100 μm to 5 μm.
A foam metal made of Ni, Ni-Cr, or stainless having a thickness of 00 μm and a thickness of 1 mm to 10 mm is used. The orifice component 18 is made of copper, brass, aluminum or stainless steel by cutting or forging.

Further, as shown in FIG. 29, the orifice component 1
After inserting 8 into the body 119, the body 119 may be drawn to fix the orifice component 18. In the figure, 10 is a porous permeable material, 18 is an orifice component in which the porous permeable material 10 is fixed before and after the orifice 18a, 11
Reference numeral 9 denotes a main body, which is made slightly larger than the outer diameter of the orifice component 18. Then, after inserting the orifice component 18 into the main body 19, the orifice component 18 is fixed to the main body 119 by drawing the main body 119 corresponding to both end positions of the orifice component 18.

Therefore, the orifice component 18 can be easily inserted into the main body 119 without press fitting or shrink fitting, so that the assembling property is improved and the manufacturing time of the expansion device is shortened. Further, in the present embodiment, the inlet (1) and the outlet (1) for the fluid (refrigerant) are provided, but as described in the first to third embodiments, it is sufficient that there are one or more inlets and outlets and two or more locations. It may be a plural number. Also, the flow directions of the inlet and the outlet may be installed in reverse.

The porous permeable material 10 is not limited to a foam metal, but is also a porous permeable material of sintered metal obtained by sintering metal powder, or ceramics, or a wire mesh, several wire meshes, or several wire meshes. The same effect can be obtained with a sintered wire net and a laminated wire net that are stacked and sintered.

Further, the porous permeable material 10 does not have to be disk-shaped, and the same effect can be obtained even if it has a polygonal shape or the like. Further, the orifice part 18, the main bodies 19 and 119 may have a cylindrical shape such as a polygonal shape instead of a cylindrical shape to obtain the same effect.

Embodiment 5. 30 and 31 are cross-sectional views of a diaphragm device representing the fifth embodiment, and are connected to the same refrigerant circuit as described in the first embodiment. In the figure, 10 is a porous permeable material, and 18 is, for example, a cylindrical orifice component having a throttle passage 18a serving as an orifice. The porous permeable material 10 is inserted and fixed on both sides of the throttle passage 18a by press fitting or caulking. Has been done. The orifice 18a has an inner diameter of 0.5 mm to 2 mm and a length of 1 mm to 4
In the range of mm, the size is determined according to the required drawing amount.

The orifice 18a and the porous permeable material 10
The orifice part 18 is provided in the orifice component 18 in the flow direction of the fluid (refrigerant) so that a predetermined gap 18c is formed between
For example, a ring-shaped positioning protrusion 18b is provided before and after. The positioning protrusion 18b has an inner diameter of 10 mm to 20
The height of the positioning protrusion 18b is set so that the gap 18c between the porous permeable material 10 and the orifice 18a is 5 mm or less. The orifice component 18 to which the porous permeable material 10 is integrally fixed is fixed to, for example, a pipe-shaped main body 20 by press fitting or shrink fitting. The ring-shaped positioning protrusion 18b is the orifice component 1
It may be either integrated with 8 or separate.

In the main body 20, after the orifice component 18 is inserted and fixed, the lids 15 are hermetically joined to both ends thereof. Further, the body 20 has a fluid (refrigerant) in the body 20.
The flow path is formed by burring in a direction substantially perpendicular to the flow direction, and the pipe 13 is connected to this flow path at a right angle to the flow direction of the fluid (refrigerant). At this time, the space between the porous permeable material 10 and the pipe 13 has a predetermined distance and a predetermined inner diameter. As the porous permeable material 10, a foam metal made of Ni, Ni-Cr, or stainless steel having a diameter of a ventilation hole of 100 μm to 500 μm and a thickness of 1 mm to 10 mm is used. Also, the orifice part 1
8 is made of copper, brass, aluminum or stainless steel by cutting or forging.

Further, as shown in FIG. 31, the orifice component 1
After inserting 8 into the body 20, the body 20 may be drawn to fix the orifice component 18. In the figure, 1
Reference numeral 0 is a porous permeable material, 18 is an orifice component in which the porous permeable material 10 is fixed in front of and behind the orifice 18a, and 20 is a main body, which is made slightly larger than the outer diameter of the orifice component 18. Then, after the orifice component 18 is inserted into the main body 20, the main body 20 corresponding to both end positions of the orifice component 18 is drawn, so that the orifice component 18 is fixed to the main body 20.

Therefore, since the orifice component 18 can be easily inserted into the main body 20 without press fitting or shrink fitting, the assembling property is improved and the manufacturing time of the expansion device is shortened. Further, in the present embodiment, the inlet (1) and the outlet (1) for the fluid (refrigerant) are provided, but as described in the first to third embodiments, it is sufficient that there are one or more inlets and outlets and two or more locations. It may be a plural number. Also, the flow directions of the inlet and the outlet may be installed in reverse.

The porous permeable material 10 is not limited to the foamed metal, but is also a porous permeable material of sintered metal obtained by sintering metal powder, or ceramics, wire mesh, several wire meshes, or several wire meshes. The same effect can be obtained with a sintered wire net and a laminated wire net that are stacked and sintered.

Further, the porous permeable material 10 does not have to be disk-shaped, and the same effect can be obtained even if it has a polygonal shape. Further, the orifice part 18 and the main body 20 may have a cylindrical shape such as a polygonal shape instead of the cylindrical shape to obtain the same effect.

Sixth Embodiment 32, 33, 34,
FIG. 35 is a sectional view of a diaphragm device representing the sixth embodiment,
It is connected to the fluid (refrigerant) circuit similar to that described in the first embodiment. In FIG. 32, 10 is a porous permeable material, and 18 is, for example, a cylindrical orifice component having a throttle passage 18a serving as an orifice.
The porous permeable material 10 is inserted and fixed to both sides of a by press fitting or caulking. The orifice 18a has an inner diameter of 0.5
The size is determined depending on the necessary drawing amount within a range of mm to 2 mm and a length of 1 mm to 4 mm.

The orifice 18a and the porous permeable material 10
The orifice part 18 is provided in the orifice component 18 in the flow direction of the fluid (refrigerant) so that a predetermined gap 18c is formed between
For example, a ring-shaped positioning protrusion 18b is provided before and after. The positioning protrusion 18b has an inner diameter of 10 mm to 20
The height of the positioning protrusion 18b is set so that the gap 18c between the porous permeable material 10 and the orifice 18a is 5 mm or less. The orifice component 18 to which the porous permeable material 10 is integrally fixed is fixed to, for example, a pipe-shaped main body 21 by press fitting or shrink fitting. The ring-shaped positioning protrusion 18b is the orifice component 1
It may be either integrated with 8 or separate.

Further, the main body 21 is throttled so that the orifice component 18 is inserted and fixed in the left side of the drawing from the direction indicated by the reference numeral 21a and then becomes substantially parallel to the flow direction of the fluid (refrigerant) in the main body. The pipe 13A that is processed into a flow path is connected. A right side 21b of the main body 21 in the drawing is closed, and a pipe 13B serving as a flow path is connected by a burring process in a direction substantially perpendicular to the flow direction of the fluid (refrigerant) in the main body 21. At this time, the space between the porous permeable material 10 and the pipe 13 has a predetermined distance and a predetermined inner diameter. The porous permeable material 10 has a vent hole diameter of 100 μm to 500 μm.
A metal foam made of Ni, Ni-Cr, or stainless steel having a thickness of 1 to 10 mm in m is used. The orifice component 18 is made of copper, brass, aluminum or stainless steel by cutting or forging.

Further, as shown in FIG. 33, the orifice component 1
After inserting 8 into the main body 21, the orifice part 18 may be fixed by drawing the positions corresponding to both ends of the orifice part 18 of the main body 21. In the figure, 10 is a porous permeable material, 18 is an orifice part in which the porous permeable material 10 is fixed before and after the orifice 18a, and 21 is a main body, which is made slightly larger than the outer diameter of the orifice part 18. After inserting the orifice part 18 into the body 21, the body 21 corresponding to both end positions of the orifice part 18 is inserted.
The orifice component 18 is fixed to the main body 21 by drawing.

Therefore, since the orifice component 18 can be easily inserted into the main body 21 without press fitting or shrink fitting, the assemblability is improved and the manufacturing time of the expansion device is shortened. The same effect can be obtained by airtightly joining the lid 15 to one end of the main body 21 as shown in FIGS. 34 and 35. Further, in the present embodiment, the inlet (1) and the outlet (1) for the fluid (refrigerant) are provided, but as described in the first to third embodiments, it is sufficient that there are one or more inlets and outlets and two or more locations. It may be a plural number. Also, the flow directions of the inlet and the outlet may be installed in reverse.

The porous permeable material 10 is not limited to a foam metal, but is also a porous permeable material of sintered metal obtained by sintering metal powder, or ceramics, wire mesh, several wire meshes, or several wire meshes. The same effect can be obtained with a sintered wire net and a laminated wire net that are stacked and sintered.

Further, the porous permeable material 10 does not have to be disk-shaped, and the same effect can be obtained even if it has a polygonal shape or the like. Further, the orifice component 18 and the main body 21 may have a cylindrical shape such as a polygonal shape instead of the cylindrical shape to obtain the same effect. Further, as described above, in the first to sixth embodiments, the predetermined clearance 11c is provided between the porous permeable material 10 and the orifices 11a and 18a, but it will be described with reference to FIG. 14 of the first embodiment. As described above, the predetermined clearance 11c may not be provided. By doing so, it is not necessary to provide the positioning protrusion 12b, and thus a low-cost diaphragm device can be obtained.

Seventh Embodiment 36, 37, 38,
39 and 40 are cross-sectional views of the diaphragm device representing the seventh embodiment, in which the filter 22 is provided in the diaphragm device of the first embodiment. 41, 42, 43, and 4
4 is a perspective view of the filter 22. Further, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Further, the same refrigerant circuit as that described in the first embodiment is connected. Reference numeral 22 is a filter, and as shown in FIG. 41, the mesh 22a has, for example, a ring-shaped fixed part 22.
36, and is fixed to the inner wall of the pressing component 12 of the expansion device 6 by press fitting or the like as shown in FIG. The mesh 22a of the filter 22 is made of wire mesh or the like and has a diameter smaller than that of the ventilation hole of the porous permeable material 10.

The circuit configuration of the refrigeration cycle is the same as that of the first embodiment, but when foreign matter is generated in the fluid (refrigerant) flowing through the refrigeration cycle, the mesh 22 of the filter 22 is used.
Filter 22 for foreign substances that are larger than the ventilation hole diameter of a.
, And does not reach the porous permeable material 10. On the other hand, in the case of a foreign substance smaller than the vent hole diameter of the mesh 22a of the filter 22, it passes through the filter 22 and the porous permeable material 10
However, since the diameter of the ventilation hole of the porous permeable material 10 is larger than the diameter of the ventilation hole of the mesh 22a of the filter 22, the porous permeable material 10 also passes through. Therefore, the porous permeable material 10 is not clogged with foreign matter, and the clogging resistance is improved. Further, it is possible to prevent the performance from being deteriorated due to an increase in pressure loss due to the clogging of the porous permeable material 10, and it is possible to obtain a highly reliable diaphragm device. Further, the filter 22 is connected to the porous permeable material 10 and the throttle passage 11a.
If it is provided between and, the porous permeable material 10 will not be clogged with foreign matters even when the flow direction is reversed, and clogging resistance will be improved.

Further, as shown in FIG. 42, the fixing part 22b of the filter 22 in which the surface area of the mesh 22a is increased is shown in FIG.
As shown in FIG. 7, if the inner wall of the pressing component 12 is fixed by press fitting or the like, the amount of foreign matter that can be held by the filter 22 can be increased, and the resistance to clogging is further improved. Further, as shown in FIG. 43, the filter 22 has a fixing part 22b for fixing the mesh 22a.
The same effect can be obtained by a structure in which the fixed extending portion 22c is provided on the above and the filter 22 is fixed by sandwiching the fixed extending portion 22c between the pressing component 12 and the porous permeable material 10 as shown in FIG. Further, the filter 22 has a surface area increased as shown in FIG. 44, and further has a fixed protrusion 22c provided on the fixed component 22b, and as shown in FIG. 39, between the pressing component 12 and the porous permeable material 10. The same effect can be obtained even if the filter 22 is fixed by sandwiching the fixed extension 22c.

In the present embodiment, the filter 22 is set to 1
However, more than one may be installed. Further, in the present embodiment, the filter 22 is provided only on one side of the throttle passage 11a, but it may be provided on both sides of the throttle passage 11a as shown in FIG. Further, the filter 22 of the present embodiment may be used in any of the expansion devices described in the first to sixth embodiments to obtain a expansion device and a refrigeration cycle device with improved clogging resistance and high reliability. You can

In the present embodiment, a wire mesh is used as a component of the filter 22, but a porous metal, a sintered metal obtained by sintering metal powder, or a ceramic porous permeable material, and several wire meshes are stacked. The same effect can be obtained by using a metal wire net, a sintered wire net formed by stacking several wire nets, and a laminated wire net.

Further, the porous permeable material 10 described in Embodiments 1 to 7 may be provided with through holes as shown in FIGS. 45 and 46. 45 and 46 are perspective views of the porous permeable material representing the seventh embodiment. In the figure, 10 is a porous permeable material, and 37 is a through hole provided at a position deviated from the position of the throttle passage 11a. 1 mm to 3 at a position deviated from the throttle passage 11a in the flow direction of the porous permeable material 10.
Even if the through hole 37 of mm (equal to or larger than the inner diameter of the orifice) is provided, the resistance to clogging can be increased and a highly reliable device can be obtained without losing the function of reducing flow noise.

Since the through hole 37 is displaced from the throttle passage 11a with respect to the flow direction of the fluid (refrigerant) and the porous permeable material 10 is present in the portion that easily flows into the throttle passage 11a, the flow noise is reduced. It is possible to increase the resistance of the porous permeable material 10 to clogging without losing its function. Further, since the porosity of the porous permeable material is large, the fluid (refrigerant) is not concentrated in the through holes 37, and the porous permeable material 10 does not lose the above function. Further, similar effects can be obtained even if two through holes 37 are provided as shown in FIG. 39 or three or more through holes 37 are provided.

Further, in the first to seventh embodiments, the case where the refrigerant is used as the fluid used in the refrigeration cycle apparatus and R410A is used as the refrigerant has been described. This R410A refrigerant is an HFC-based refrigerant, is a refrigerant suitable for global environment protection that does not destroy the ozone layer, and has a smaller refrigerant pressure loss than the case of using R22 which has been used as a conventional refrigerant. The effect of reducing the refrigerant flow noise is obtained compared to the case where a refrigerant is used.

Further, the refrigerant used in this refrigeration cycle apparatus is not limited to R410A, but may be HFC refrigerant R407C, R404A, or R507A. Further, from the viewpoint of preventing global warming, R32 alone, R15, which is an HFC refrigerant having a small global warming potential,
2a alone or a mixed refrigerant such as R32 / R134a may be used. Further, HC-based refrigerants such as propane, butane, and isobutane, natural refrigerants such as ammonia, carbon dioxide, ether, and mixed refrigerants thereof may be used. Further, in the expansion device of the present invention, not only the refrigeration / air-conditioning device but also the evaporator and the condenser are integrally configured, and the dehumidifier and the refrigeration cycle having the heat exchanger used by dividing the inside are completed only in the room. It can also be applied to existing refrigerators and window air conditioners. Further, the expansion device of the present invention is not used only for the refrigeration cycle device, but may be used for any device that requires expansion. Also, any fluid may be used for the throttle device.

[0104]

As described above, the invention according to claim 1 of the present invention has two spaces which are communicated with each other through the throttle passage and which are arranged substantially linearly with respect to the fluid flow direction. The main body, two flow paths for communicating the two spaces inside the main body with the outside of the main body, and the inside of the main body fixed so as to be arranged substantially linearly with respect to the two spaces inside the main body. Since the porous permeable material is provided so as to partition at least one of the two spaces into a throttle passage side and a flow passage side, the vapor-like fluid and the liquid fluid form a homogeneous gas-liquid two-phase flow. Since it can pass through the throttle passage at the same time, the velocity of the fluid does not fluctuate, the pressure does not fluctuate, and noise hardly occurs.

The invention according to claim 2 of the present invention comprises: a main body having two spaces which are communicated with each other through a throttle passage and which are arranged substantially linearly with respect to a fluid flow direction;
At least one of the two spaces is provided so that the fluid passes in the flow direction of the fluid, and at least 1
A porous permeable material that partitions the two spaces into a space on the side opposite to the throttle passage and a space on the opposite side; and a positioning protrusion provided between the porous permeable material and the throttle passage for positioning the porous permeable material in the fluid flow direction. Positioning the porous permeable material with a holding part provided with a flow path provided to communicate the space on the opposite side with the outside and holding the porous permeable material from the opposite side of the throttle passage. Since the positioning is performed by contacting the protrusions, the porous permeable material can be positioned easily and reliably during assembly, and the assembly time can be shortened and the cost reduction device can be obtained.

In the invention according to claim 3 of the present invention, since a gap is provided between the throttle passage and the porous permeable material, the passage area of the fluid passing through the porous permeable material can be made large and effective. Since it can be used, even when foreign matter is mixed in the fluid, the clogging resistance against foreign matter is improved and a highly reliable throttling device can be obtained.

In the invention according to claim 4 of the present invention, the throttle portion and the porous permeable material are integrally formed, and the throttle passage is fixed to the inside of the main body so as to divide the inside of the main body into two spaces. Since the throttle passage and the porous permeable material can be assembled to the main body in a pre-assembled state, the assembling property is improved and a highly reliable throttle device can be obtained.

Further, in the invention according to claim 5 of the present invention, a through hole having a diameter larger than the diameter of the throttle passage is formed in the portion of the porous permeable material at a portion deviated from the axial position in the flow direction of the throttle passage. Since it is provided, it is possible to improve the resistance to clogging of the porous permeable material without losing the function of reducing the flow noise.

Further, according to a sixth aspect of the present invention, the ventilation hole of the porous permeable material is provided at a portion between the throttle passage and the porous permeable material or at a portion between the porous permeable material and the flow path. Since a filter with a mesh smaller than the diameter is provided, foreign matter does not clog the porous permeable material, clogging proof strength improves, and it is possible to prevent performance from decreasing due to increased pressure loss due to clogging. Therefore, a highly reliable diaphragm device can be obtained.

Further, in the invention according to claim 7 of the present invention, since two or more flow paths are provided for one space, even if there are a plurality of pipes at the inlet and the outlet of the heat exchanger, they can be used as they are. Since it can be connected to the diaphragm device, it is not necessary to purposely combine them into one, and it is possible to obtain a diaphragm device that can reduce the processing and assembly time.

Further, in the invention according to claim 8 of the present invention, the take-out direction of the flow path is set in a direction substantially parallel or at a right angle to the flow direction of the fluid in the main body with respect to one space. When assembling to any device such as a cycle device, it is not necessary to bend the assembling pipe, the assembling can be easily performed, and the throttling device that can reduce the assembling time can be obtained.

According to a ninth aspect of the present invention, there is provided a main body having two spaces which are communicated with each other through a throttle passage and which are arranged on a substantially straight line with respect to the flow direction of the refrigerant, and the main body. Two flow paths that respectively connect the two internal spaces to the outside of the main body, and the inside of the main body are fixed so as to be arranged substantially linearly with respect to the two internal spaces of the main body. A throttling device having a porous permeable material provided so as to partition one space into a throttle passage side and a flow passage side is arranged in a refrigerant circuit inside or outside a heat exchanger constituting a refrigeration cycle and indoors. Therefore, it is possible to obtain a low-cost and low-noise refrigeration cycle device without the need for measures such as winding a sound insulating material or a vibration damping material around the diaphragm device, which is required in the conventional device.

The invention according to claim 10 of the present invention is
A main body having two spaces that are communicated with each other through a throttle passage and that are arranged substantially linearly with respect to the flow direction of the refrigerant;
A porous permeable material that is provided so that the refrigerant passes in the direction of flow of the refrigerant in at least one of the two spaces and that partitions the at least one space into a throttle passage side space and an opposite side space; A positioning protrusion that is provided between the permeable material and the throttle passage and forms a gap between the porous permeable material and the throttle passage, and a flow passage that is provided so that the opposite space communicates with the outside, A throttling device provided with a pressing component provided to press the porous permeable material from the opposite side of the throttling passage to the positioning protrusion, in a refrigerant circuit inside or outside a heat exchanger that constitutes a refrigeration cycle, and indoors. Since it is arranged, it is not necessary to separately provide a filter in the refrigerant circuit, and a refrigeration cycle device with low cost, low noise and high reliability can be obtained.

Further, the invention according to claim 11 of the present invention is
An indoor unit having a heat exchanger arranged in the housing for exchanging heat in the room, and a control device arranged in the housing on the side of the heat exchanger, the heat exchanger and the control device. Since the throttling device is placed between the two, the throttling device has low noise, so there is no need to use a sound insulating material, etc., and it can be installed anywhere, and a low-cost refrigeration cycle device with great freedom in installing the throttling device To be

The invention according to claim 12 of the present invention is
Since the indoor unit having the heat exchanger arranged in the housing for exchanging heat in the room is provided, and the throttling device is arranged between the housing and the heat exchanger, the throttling device has low noise, so that a sound insulating material, etc. A low-cost refrigeration cycle device that does not need to be installed, can be installed anywhere, and has a high degree of freedom in installation of the expansion device can be obtained.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram according to a first embodiment.

FIG. 2 is a cross-sectional view of the flow rate control device according to the first embodiment.

FIG. 3 is a cross-sectional view of the diaphragm device according to the first embodiment.

FIG. 4 is a pressure-enthalpy diagram showing an operating state of the air conditioner according to the first embodiment.

FIG. 5 is a diagram for explaining the flow state of the refrigerant at the inlet of the expansion device according to the first embodiment.

FIG. 6 is a front view of the indoor unit according to the first embodiment with a front cover removed.

FIG. 7 is a front view of the indoor unit according to the first embodiment with a front cover removed.

FIG. 8 is a cross-sectional view of the indoor unit according to the first embodiment.

FIG. 9 is a cross-sectional view of the indoor unit according to the first embodiment.

FIG. 10 is a cross-sectional view of the indoor unit according to the first embodiment.

FIG. 11 is a cross-sectional view of the diaphragm device according to the first embodiment.

FIG. 12 is a cross-sectional view of the diaphragm device according to the first embodiment.

FIG. 13 is a cross-sectional view of the diaphragm device according to the first embodiment.

FIG. 14 is a cross-sectional view illustrating an example of a diaphragm device when a predetermined gap according to the first embodiment is not provided.

FIG. 15 is a cross-sectional view of a diaphragm device according to a second embodiment.

FIG. 16 is a sectional view of a diaphragm device according to a second embodiment.

FIG. 17 is a sectional view of a diaphragm device according to a second embodiment.

FIG. 18 is a sectional view of a diaphragm device according to a second embodiment.

FIG. 19 is a sectional view of a diaphragm device according to a second embodiment.

FIG. 20 is a cross-sectional view of a diaphragm device according to a second embodiment.

FIG. 21 is a sectional view of a diaphragm device according to a third embodiment.

FIG. 22 is a sectional view of a diaphragm device according to a third embodiment.

FIG. 23 is a cross-sectional view of a diaphragm device according to a third embodiment.

FIG. 24 is a sectional view of a diaphragm device according to a third embodiment.

FIG. 25 is a sectional view of a diaphragm device according to a third embodiment.

FIG. 26 is a sectional view of a diaphragm device according to a third embodiment.

FIG. 27 is a sectional view of a diaphragm device according to a third embodiment.

FIG. 28 is a cross-sectional view of a diaphragm device according to a fourth embodiment.

FIG. 29 is a cross-sectional view of a diaphragm device according to a fourth embodiment.

FIG. 30 is a sectional view of a diaphragm device according to a fifth embodiment.

FIG. 31 is a cross-sectional view of a diaphragm device according to a fifth embodiment.

FIG. 32 is a sectional view of a diaphragm device according to a sixth embodiment.

FIG. 33 is a sectional view of a diaphragm device according to a sixth embodiment.

FIG. 34 is a sectional view of a diaphragm device according to a sixth embodiment.

FIG. 35 is a sectional view of a diaphragm device according to a sixth embodiment.

FIG. 36 is a sectional view of a diaphragm device according to a seventh embodiment.

FIG. 37 is a sectional view of a diaphragm device according to a seventh embodiment.

FIG. 38 is a sectional view of a diaphragm device according to a seventh embodiment.

FIG. 39 is a sectional view of a diaphragm device according to a seventh embodiment.

FIG. 40 is a sectional view of a diaphragm device according to a seventh embodiment.

41 is a perspective view of the filter according to the seventh embodiment. FIG.

42 is a perspective view of the filter according to the seventh embodiment. FIG.

43 is a perspective view of the filter according to the seventh embodiment. FIG.

FIG. 44 is a perspective view of the filter according to the seventh embodiment.

FIG. 45 is a perspective view of another porous permeable material according to the seventh embodiment.

FIG. 46 is a perspective view of another porous permeable material according to the seventh embodiment.

FIG. 47 is a refrigerant circuit diagram of a conventional air conditioner.

FIG. 48 is a cross-sectional view of a conventional diaphragm device.

FIG. 49 is a sectional view of a conventional diaphragm device.

FIG. 50 is a cross-sectional view of a conventional diaphragm device.

FIG. 51 is a cross-sectional view of a honeycomb pipe used in a conventional diaphragm device.

[Explanation of symbols]

1 compressor, 2 flow path switching means, 3 outdoor heat exchanger, 4
1st flow control device, 5 1st indoor heat exchanger, 6 throttling device, 7 2 way valve, 8 2nd indoor heat exchanger, 9 2nd flow control device, 10 porous permeable material, 11 main body, 11a orifice, 11b positioning protrusion, 11c predetermined gap,
12 pressing parts, 12a internal space, 13 flow paths, 1
4 Holding parts, spaces inside 14a, 14b, 15
Lid, 16, 17 Piping, 18 Orifice part, 18
a throttle passage, 18b positioning protrusion, 18c predetermined gap, 19, 20, 21 body, 22 filter, 2
2a mesh, 22b filter fixing parts, 22
c extension part, 23 fan motor, 24 control device, 2
5 heat exchanger, 38 housing, 39 blower fan, 112
Holding parts, 116 bypass piping, 122, 12
4,134 Holding parts.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoru Hirakuni 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) Reference JP-A-11-325655 (JP, A) JP-A 7-146032 (JP, A) JP-A-57-108568 (JP, A) JP-A-7-229636 (JP, A) JP-A-5-52447 (JP, A) Actual development Sho-49-538 (JP, A) U) Actual development Sho 55-147814 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 41/06 F25B 13/00 371 F25B 39/00 F25B 41/00 F25B 40/00 F25B 39/02

Claims (12)

(57) [Claims] 1. A main body having two spaces which are communicated with each other through a throttle passage and are arranged on a substantially straight line with respect to a flow direction of a fluid, and two spaces inside the main body are provided outside the main body. And two flow paths communicating with each other, and fixed inside the main body so as to be arranged substantially linearly with respect to the two spaces inside the main body, and at least one space of the two spaces is throttled. A diaphragm device, comprising: a porous permeable material provided so as to be divided into a passage side and the flow passage side. 2. A main body having two spaces which are communicated with each other through a throttle passage and which are arranged on a substantially straight line with respect to a fluid flow direction, and a fluid in at least one of the two spaces. A porous permeable material that is provided so that the fluid passes in the flow direction and that partitions the at least one space into a space on the throttle passage side and a space on the opposite side; and the porous permeable material and the throttle passage. The porous permeable material has a positioning protrusion that is provided between the positioning protrusions for positioning the porous permeable material in the fluid flow direction, and a flow path that is provided so as to communicate the opposite space with the outside. A pressing component provided so as to press down from the opposite side of the throttle passage, and the porous permeable material is brought into contact with the positioning protrusion to perform positioning. 3. The throttle device according to claim 1, wherein a gap is provided between the throttle passage and the porous permeable material. 4. The throttle passage and the porous permeable material are integrally formed, and the throttle passage is fixed to the inside of the main body so as to divide the inside of the main body into two spaces.
Thru | or the diaphragm apparatus of Claim 1. 5. A through hole having a diameter larger than the diameter of the throttle passage is provided in a portion of the porous permeable material that is located off the axial position with respect to the flow direction of the throttle passage. The diaphragm device according to any one of claims 1 to 4. 6. A filter having a mesh smaller than the diameter of the vent hole of the porous permeable material is provided at a site between the throttle passage and the porous permeable material or at a site between the porous permeable material and the flow channel. The diaphragm device according to any one of claims 1 to 5. 7. The diaphragm device according to claim 1, wherein two or more flow paths are provided for one space. 8. The method according to claim 1, wherein the flow path is taken out in a direction substantially parallel to or perpendicular to the flow direction of the fluid in the main body with respect to one space.
The diaphragm device according to item 1. 9. A main body having two spaces which are communicated with each other through a throttle passage and are arranged on a substantially straight line with respect to the flow direction of the refrigerant, and two spaces inside the main body are provided outside the main body. And two flow paths communicating with each other, and fixed inside the main body so as to be arranged substantially linearly with respect to the two spaces inside the main body, and at least one space of the two spaces is throttled. A squeezing device having a porous permeable material provided so as to be partitioned into a passage side and the flow passage side is arranged in a refrigerant circuit inside or outside a heat exchanger configuring a refrigeration cycle and indoors. Refrigeration cycle device. 10. A main body having two spaces which are communicated with each other through a throttle passage and are arranged on a substantially straight line with respect to a flow direction of the refrigerant, and a refrigerant in at least one of the two spaces. A porous permeable material that is provided so that the refrigerant passes in the flow direction and partitions the at least one space into a space on the throttle passage side and a space on the opposite side; and the porous permeable material and the throttle passage. The porous permeable material has a positioning protrusion that is provided between the porous permeable material and the throttle passage, and a flow path that is provided to communicate the opposite space with the outside. A pressing device provided so as to press the material from the opposite side of the throttle passage to the positioning projection, and a throttle device provided with the pressing device inside or outside the heat exchanger constituting the refrigeration cycle and inside the room. Placement A refrigeration cycle device characterized in that 11. An indoor unit having a heat exchanger arranged in a housing for exchanging heat of indoor air, and a control device arranged in the housing on a side of the heat exchanger, The refrigeration cycle apparatus according to claim 9 or 10, wherein an expansion device is arranged between the heat exchanger and the control device. 12. An indoor unit having a heat exchanger arranged in a housing for heat-exchanging indoor air, wherein a throttling device is arranged between the housing and the heat exchanger. The refrigeration cycle apparatus according to claim 9 or 10.