JP2004003793A - Throttle valve device and air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To significantly reduce noise caused by the intermittent expansion burst of gas particles (gas blocks) after passing through an orifice by preventing the gas particles from being enlarged in the throttle valve device. <P>SOLUTION: A passage that guides fluid to the throttle passage member 23 from a filter element 20 for capturing an impure ingredient is provided by a distributed communicating hole 26 of a plurality of small paths. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a throttle valve device and an air conditioner, and more particularly to a throttle valve device and an air conditioner used as a dehumidifying throttle valve in an air conditioner having a dehumidification mode.
[0002]
[Prior art]
As an air conditioner capable of dehumidifying operation, an indoor heat exchanger is divided into two, and a throttle valve device (a dehumidifying throttle valve and a cycle dry valve) is provided between the two indoor heat exchangers and becomes a throttle valve when the valve is closed. During the dehumidifying operation, the refrigerant flows through the throttle passage of the throttle valve device which closes and acts as a throttle valve, thereby condensing the upstream indoor heat exchanger of the two divided indoor heat exchangers. The indoor heat exchanger on the downstream side is the evaporator, the indoor air is cooled and dehumidified by the indoor heat exchanger on the downstream side, and the air is heated by the indoor heat exchanger on the upstream side without lowering the air temperature. An air conditioner with a dehumidification mode that can perform dehumidification is known.
[0003]
An air conditioner with a dehumidification mode of this type is disclosed in JP-A-2-183776, JP-A-7-91778 (Japanese Patent No. 3047702), JP-A-11-51514, and the like.
[0004]
In the air conditioner as described above, during the dehumidifying operation, the throttle valve device for cycle drying is closed, and the refrigerant flows through the narrow throttle passage of the throttle valve device to obtain the throttle effect. In the indoor unit where the flow is disturbed and the throttle valve device is installed, the refrigerant jet sound propagates in the refrigerant liquid, and the condenser and evaporator of the indoor unit act as a resonance plate, causing an unpleasant refrigerant rubbing sound (refrigerant passing sound). ) Occurs. Such a phenomenon becomes more conspicuous as the refrigerant circulation flow rate increases due to an increase in the compressor rotation speed, and the unpleasant noise level increases.
[0005]
In view of this, a porous member made of a sintered metal or the like is provided in the throttle passage, or a throttle passage is formed by the porous member. It has already been proposed to reduce the rubbing noise (Japanese Utility Model Laid-Open No. 1-152176, Japanese Patent Laid-Open No. 2000-346495).
[0006]
[Problems to be solved by the invention]
Since there is a solid contaminant called contamination in the refrigerant flow, the contaminant is clogged in the throttle passage during long-term use, causing a problem that the refrigerant flow rate in the throttle valve device changes. For this reason, it is difficult to obtain stable dehumidifying operation performance in long-term use.
[0007]
The refrigerant flowing through the throttle valve device for cycle drying is a gas-liquid mixture of liquid and gas (gas). If there is a large space inside the throttle valve device, gas particles (gas If the gas mass becomes too large and the gas particles become too large, the gas particles immediately after passing through the orifice expand and rupture, and the gas of the gas particles flows, causing noise.
[0008]
The present invention has been made in order to solve the above-mentioned problems, and it is possible to sufficiently reduce the refrigerant rubbing noise without causing the fluctuation of the refrigerant flow rate due to the clogging of the contaminant in the throttle passage, and even in long-term use, It is an object of the present invention to provide a throttle valve device and an air conditioner capable of obtaining stable dehumidifying operation performance and quietness.
[0009]
[Means for Solving the Problems]
To achieve the above object, a throttle valve device according to the present invention includes a first inlet / outlet port, a second inlet / outlet port, a valve chamber constantly communicating with the first inlet / outlet port, and the valve chamber. A throttle valve device comprising: a valve housing defining a valve port provided between the valve chamber and the second inlet / outlet port; and a valve body provided in the valve chamber and opening and closing the valve port. A cylindrical contaminant trapping filter element is attached to the outer periphery of the diaphragm, and the restrictor is provided in the valve body so as to communicate with the contaminant trapping filter element on one side and to open with the valve port on the other side. A passage in which a restricting passage member and a fluid flow noise reducing filter element for performing an action are arranged, and a communication passage connects the contaminant trapping filter element and an arrangement portion of the restricting passage member and the fluid flow noise reducing filter element in the valve body. But Pieces of given by the small diameter of the dispersed communication hole.
[0010]
According to the throttle valve device of the present invention, when the valve is closed, a fluid such as a refrigerant flows and mixes in the order of the contaminant trapping filter element → the fluid flow noise reducing filter element → the throttle passage member → the fluid flow noise reducing filter element. The contaminants such as contamination in the fluid flow are captured by the filter element for capturing substances, the throttle effect is obtained by the throttle passage member, and the rectifying action is obtained by the filter element for reducing fluid flow noise.
[0011]
When the fluid flowing through the contaminant trapping filter element is a gas-liquid mixed fluid, gas particles in the gas-liquid mixed fluid are fragmented by passing through the contaminant trapping filter element, and the constriction passage member is narrower than the contaminant trapping filter element. If there is a large passage space on the way to the gas, the gas particles are likely to stay, and the gas particles will enlarge during the stay, causing noise due to intermittent expansion and rupture of the gas particles immediately after passing through the orifice. Since the passage for guiding the fluid from the trapping filter element to the throttle passage member is a small-diameter dispersed communication hole dispersed in a plurality, the individual dispersed communication holes do not exhibit a large passage space, and the gas particles are dispersed in the dispersed communication holes. There is no stagnation and gas particles do not enlarge.
[0012]
Further, in the throttle valve device according to the present invention, the fluid flow noise reducing filter element is disposed on both the upstream side and the downstream side of the throttle passage member when viewed from the fluid flow, and the dispersed communication hole is provided with one of the mixed communication holes. It communicates directly or with a small gap with the filter element for capturing objects, and on the other hand communicates directly with the filter element for reducing fluid flow noise upstream of the throttle passage member. The fluid flow noise reduction filter element upstream of the throttle passage member also performs a bubble recombination preventing action.
[0013]
Further, in the throttle valve device according to the present invention, the pressure loss of each of the contaminant trapping filter element and the filter element for reducing fluid flow noise and the pressure loss of the entire dispersion communication hole are smaller than the pressure loss of the throttle passage member. small. Thus, the degree of throttling (throttle flow rate) by the throttling valve device is set by the throttling passage member.
[0014]
When the degree of throttle (throttle flow rate) by the throttle valve device is set by the throttle passage member, in the throttle valve device according to the present invention, the throttle valve member is disposed on both the upstream side and the downstream side of the throttle passage member when viewed from the fluid flow. Each of the fluid flow noise reduction filter elements and the contaminant trapping filter element is made of a sintered multilayer wire mesh, a porous sintered metal, a foamed metal or a porous metal body, or a plastic sintered porous body. And a filter material having a nominal filtration accuracy of 50 to 600 μm.
[0015]
Further, the throttle valve device according to the present invention further includes a dispersed ejection member having a plurality of ejection holes, further downstream than the fluid flow noise reducing filter element downstream of the throttle passage member. . As a result, the flow path length of the fluid flowing through the fluid flow noise reduction filter element is increased as compared with the case of a single hole, the effectiveness of the fluid flow noise reduction filter element is increased, and an adjacent ejection hole is provided. The effect of canceling out the shock wave by the interference between the jet flows of the gas is obtained.
[0016]
Also, the throttle valve device according to the present invention has an electromagnetic actuator for driving the valve element to open and close, and the valve element is disposed in the plunger chamber that is continuous with the valve chamber on the side opposite to the valve port in the axial direction. The electromagnetic actuator is movably fitted with a plunger of the electromagnetic actuator, and the contaminant capturing filter element is mounted on a connecting portion between the valve body and the plunger, and has an outer diameter substantially equal to the outer diameter of the plunger. equal. Thus, the valve housing can be configured without increasing the outer diameter dimension.
[0017]
The throttle passage member incorporated in the throttle valve device according to the present invention may have a plurality of orifices provided in parallel to each other, in addition to the single hole orifice and the cross slit orifice. In the case of a plurality of orifices, the fluid flow divides each orifice, so that the kinetic energy of the fluid flow ejected from each orifice is reduced and the fluid flow noise associated with it is reduced.
[0018]
In addition, the air conditioner according to the present invention includes a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a refrigerant passage connecting these components in a loop, and the outdoor heat exchanger. An expansion valve provided in a refrigerant passage between the exchanger and the first indoor heat exchanger, wherein an expansion valve is provided between the first indoor heat exchanger and the second indoor heat exchanger. The throttle valve device according to the invention is connected.
[0019]
According to the air conditioner of the present invention, the throttle valve device performs a throttling operation between the first indoor heat exchanger and the second indoor heat exchanger by closing the valve, and the dehumidifying throttle valve. Function as
[0020]
In the air conditioner according to the present invention, the throttle valve device can be connected such that the contaminant trapping filter element is located upstream of the throttle passage member as viewed from the refrigerant flow in the cooling mode.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a first embodiment of a throttle valve device 10 according to the present invention.
[0022]
The throttle valve device 10 has a metal valve housing 11. The valve housing 11 includes a first inlet / outlet port 12, a second inlet / outlet port 13, a valve chamber 14 which is always in direct communication with the first inlet / outlet port 12, a valve chamber 14 and a second inlet / outlet port. And an outlet port 13 and a valve port 15 provided therebetween. A valve seat 16 is defined around the open end of the valve port 15 on the valve chamber 14 side.
[0023]
A valve body 17 is provided in the valve chamber 14 so as to be movable in the vertical direction (valve lift direction) in the figure. The valve element 17 is seated on a valve seat portion 16 defined around the valve port 15 at the distal end outer peripheral surface 17 </ b> A to close the valve port 15. It is movable between a valve opening position for establishing communication.
[0024]
An electromagnetic solenoid device 30 is attached to the valve housing 11. The electromagnetic solenoid device 30 includes a plunger tube 31 formed integrally with the valve housing 11, a plunger 32 fitted in a plunger chamber 31A defined in the plunger tube 31 so as to be movable in the axial direction, and a plunger tube 31. A plug-shaped coil guide member 33 fixed to the distal end of the plunger tube portion; a U-shaped outer box 35 attached to the coil guide member 33 by bolts 34 outside the plunger tube portion 31; , And a compression coil spring (valve opening spring) 37 for urging the plunger 32 toward the coil guide member 33.
[0025]
The valve chamber 14 is directly continuous with the plunger chamber 31A on the opposite side (upper side) of the valve port 15, and the valve body 17 is swaged to the plunger 32 by the upper stem 17B.
[0026]
Accordingly, the electromagnetic solenoid device 30 drives the valve body 17 upward (toward the valve opening direction) together with the plunger 32 by the spring force of the compression coil spring 37 when the electromagnetic coil portion 36 is not energized and is not energized. On the other hand, at the time of energization in which the electromagnetic coil portion 36 is energized, the plunger 32 is magnetically attracted to the lower piece 35A side of the outer case 35 against the spring force of the compression coil spring 37, The valve body 17 is driven downward (to close the valve). FIG. 1 shows an energized state.
[0027]
That is, the electromagnetic solenoid device 30 drives the valve element 17 to the valve open position separated from the valve seat 16 by the spring force of the compression coil spring 37 when not energized, and resists the spring force of the compression coil spring 37 when energized. It is a normally-open type in which the valve body 17 is driven to a valve closed position where the valve body 17 is seated on the valve seat portion 16.
[0028]
The valve element 17 is located directly above the valve port 15, and the valve element 17 is formed with a hollow opening 18 that is opened at a front end surface (lower bottom surface) facing the valve port 15. The hollow opening 18 is a lower end opening and forms a bottomed hole with an upper end closed. In the outer peripheral portion of the valve body 17, a peripheral groove 19 is formed over a wide range from the vicinity of the distal end outer peripheral surface 17 </ b> A to the connection end side (upper end side) with the plunger 32.
[0029]
A cylindrical contaminant trapping filter element 20 is fitted and mounted in the circumferential groove 19. The contaminant trapping filter element 20 is fitted in the circumferential groove 19 and has a filter outer diameter set to a size substantially equal to the outer diameter of the plunger 32, thereby increasing the outer diameter of the valve housing 11. There is no.
[0030]
The contaminant trapping filter element 20 can reduce the pressure loss in the filter due to the contaminant trapping and the gas particles in the gas-liquid mixed fluid, even if the gas particles are somewhat clogged. It is required that it does not become large, and a three-dimensional network made of a porous sintered metal (for example, a sintered metal element manufactured by SMC Corporation) having a continuous pore structure made of stainless steel, brass, etc., nickel, nickel-copper alloy, etc. Or a porous metal body (for example, Celmet manufactured by Sumitomo Electric Industries, Ltd.), a sintered porous porous body having a continuous pore structure formed by sintering a plastic powder as a raw material (for example, manufactured by Someya Seisakusho) Long life type filter materials such as sintered multi-layered wire mesh made by laminating several layers of wire mesh made of stainless steel It can be configured. The foamed metal and the porous metal described herein are obtained by subjecting a three-dimensional mesh-shaped foamed resin to a conductive treatment and electroplating nickel, a nickel-copper alloy or the like.
[0031]
The filtration performance of the contaminant trapping filter element 20 can be represented by a nominal filtration accuracy, which is a name obtained by classifying the raw material, and is based on a porous sintered metal, a foamed metal or a metal porous body, or a plastic sintered porous body. Has a pore diameter of about 50 to 500 μm and a nominal filtration accuracy of a flow resistance limit (a pressure drop limit of the filter) for trapping contaminants and maintaining fine flow of gas particles in a gas-liquid mixture fluid and normal flow. ) May be set to about 50 to 200 μm, more preferably about 50 to 150 μm.
[0032]
When the contaminant trapping filter element 20 is configured by a sintered multilayer wire mesh (sintered laminated metal mesh), as illustrated in FIGS. 9 and 10, the angle of the mesh of each layer is four or more layers. Use the one that has been shifted and laminated and sintered. In the case of a sintered multilayer wire mesh, in order to achieve both contaminant capture and the flow resistance limit for maintaining a normal flow, if the opening is 100 to 500 μm and the nominal filtration accuracy is about 50 to 200 μm, Good.
[0033]
In the hollow opening 18, a cylindrical fluid flow noise reducing filter element 21, a plate-shaped throttle passage member 23 having an orifice passage 22 formed therein, and a cylindrical fluid flow noise reducing filter element 24 are arranged in order from the lower end opening. These are inserted and fixed to the valve element 17 by swaging via a washer 25. As a result, the fluid flow noise reduction filter element 21 is at the top of the hollow opening 18, the throttle passage member 23 is below it, and another fluid flow noise reduction filter element 24 is at the bottom. The fluid flow noise reduction filter element 24 is exposed on the lower bottom surface at the lower end opening of the hollow opening 18.
[0034]
The fluid flow noise reduction filter elements 21 and 24 are disposed on both the upstream side and the downstream side of the throttle passage member 23 when viewed from the fluid flow, and for reducing noise, subdivide gas particles in the liquid flow, It is required that the pressure loss in the filter should not be greater than the pressure loss due to the throttle passage member 23 even if the filter is rectified and the filter is somewhat clogged, and a porous sintered metal (such as stainless steel or brass) having a continuous pore structure is used. For example, a sintered metal element manufactured by SMC Corporation), a three-dimensional mesh-like foamed metal or porous metal body made of nickel or a nickel-copper alloy (for example, Celmet manufactured by Sumitomo Electric Industries, Ltd.), A plastic sintered porous body having a continuous pore structure (for example, a plastic sintered porous body manufactured by Someya Seisakusho) formed by sintering and molding a plastic powder as a raw material; It can be constituted by long-life type of filter material, such as sintered multilayer wire mesh sintered stacked several sheets of.
[0035]
The filtration performance of the fluid flow noise reduction filter elements 21 and 24 can be represented by the nominal filtration accuracy, which is a name obtained by dividing the size of the raw material, as in the case of the filter element 20 for capturing contaminants. In the case of using a metal or a porous metal body or a sintered plastic porous body, the pore diameter is about 50 to 500 μm, and the nominal filtration accuracy is a flow resistance limit (a pressure loss of the filter) for maintaining a silent operation and a normal flow. In order to satisfy both of the limits, the distance may be set to about 300 to 600 μm, more preferably about 400 to 600 μm.
[0036]
When the filter elements 21 and 24 for reducing fluid flow noise are formed of a sintered multilayer wire mesh (sintered laminated metal mesh), they are illustrated in FIGS. 9 and 10 similarly to the filter element 20 for capturing contaminants. As described above, five or more layers are laminated and sintered by shifting the mesh angle of each layer. In the case of a sintered multilayer wire mesh, in order to achieve both a silent operation and a flow resistance limit for maintaining a normal flow, the opening is 100 to 700 μm, and the nominal filtration accuracy is about 300 to 600 μm, more preferably 400 to 700 μm. What is necessary is just about 600 micrometers.
[0037]
The orifice passage 22 of the throttle passage member 23 is constituted by a single hole orifice 22A as shown in FIG. 2 or a cross slit orifice 22B as shown in FIG.
[0038]
Further, as shown in FIGS. 4 and 5, the throttle passage member 23 may have a plurality of orifices 22C provided in parallel with each other. When an appropriate value At exists in the throttle passage sectional area of the throttle passage member 23, the number (the number of holes) of the orifices 22C is set to n, and the passage sectional areas of the orifices 22C are made equal to each other by Ao, and Ao = At / n is established. The passage cross-sectional area Ao of each orifice 22C is set so as to perform the above. Thereby, the flow rate becomes the same as that of the single hole in total.
[0039]
In the case of such a plurality of orifices, the fluid flow diverges through each orifice 22C, so that the kinetic energy of the fluid flow ejected from each orifice is reduced and the fluid flow noise accompanying it is reduced.
[0040]
For example, when the single diameter (diameter) of the throttle passage member 23 is 0.8 mm, the pressure difference before and after the throttle passage is 0.098 MPa, and the flow rate is 9 liters per minute, as shown in FIG. Assuming that the diameter of each orifice 22C was 0.57 mm in 2, the noise was reduced as compared with a single hole under the same conditions when the air conditioner described below was assembled. Further, as shown in FIG. 5, when the number of holes was 3 and the diameter of each orifice 22C was 0.47 mm, the noise was further reduced.
[0041]
The valve body 17 has a plurality (at least two) of small-diameter (about 0.5 to 0.7 mm) dispersed communication holes 26 for communicating the bottom of the circumferential groove 19 and the vicinity of the upper end of the hollow opening 18 with each other. It is formed radially. As a result, each of the dispersion communication holes 26 communicates directly or with a small gap with the inner peripheral surface of the contaminant trapping filter element 20 arranged on one side in the peripheral groove 19, and on the other hand, the throttle passage It is in direct communication with the outer peripheral surface on the upper end side of the fluid flow noise reduction filter element 21 on the upstream side of the member 23.
[0042]
Here, the pressure loss of each of the contaminant trapping filter element 20 and the fluid flow noise reducing filter elements 21 and 24 and the pressure loss of the plurality of dispersion communication holes 26 (total value) are determined by the pressure of the throttle passage member 23. Less than loss. Thereby, the degree of throttling (throttle flow rate) by the throttling valve device 10 is accurately set by the cross-sectional area of the orifice passage 22 formed in the throttling passage member 23.
[0043]
Next, the operation of the throttle valve device 10 having the above configuration will be described.
In a state where the electromagnetic solenoid device 30 is not energized, the valve body 17 is lifted together with the plunger 32 by the spring force of the compression coil spring 37 of the electromagnetic solenoid device 30 and separated from the valve seat 16 so that the valve port 15 is completely closed. A valve-open state is obtained in which there is no substantial throttling effect of the fully opened state.
[0044]
When the electromagnetic solenoid device 30 is energized, the plunger 32 is magnetically attracted to the lower half 35A of the outer case 35 against the spring force of the compression coil spring 37, and the valve body 17 is moved in the valve closing direction. As shown in FIG. 1, the valve element 17 is seated on the valve seat portion 16 with the distal end outer peripheral surface 17A as shown in FIG.
[0045]
In this valve closed state, the contaminant trapping filter element 20, the dispersion communication hole 26, the fluid flow noise reduction filter element 21, the orifice passage 22 of the throttle passage member 23, the fluid flow noise reduction filter element 24, and the valve port 15 are provided. When the valve chamber 14 and the second inlet / outlet port 13 communicate with each other and the first inlet / outlet port 12 is on the high pressure side and the second inlet / outlet port 13 is on the low pressure side, the contaminant trapping filter element Fluid such as a refrigerant flows in the order of 20 → distributed communication hole 26 → filter element 21 for reducing fluid flow noise → orifice passage 22 of throttle passage member 23 → filter element 24 for reducing fluid flow noise.
[0046]
When the fluid flows as described above, first, the contaminants in the fluid flow are captured by the contaminant capturing filter element 20 having a cylindrical shape and a large surface area, and the bubbles (gas particles) in the liquid flow are subdivided. Is performed, and the fluid passes through each of the plurality of dispersion communication holes 26 and flows into the fluid flow noise reduction filter element 21 in a dispersed flow, and the fluid flow noise reduction filter element 21 and the throttle passage member 23 Through the orifice passage 22 and the fluid flow noise reduction filter element 24 in that order. As a result, a required throttle effect is obtained by the orifice passage hole 22, and a rectifying action is obtained by the fluid flow noise reduction filter elements 21 and 24 before and after the orifice passage hole 22, and the rectifying action reduces fluid flow noise, thereby reducing noise. Is improved.
[0047]
In addition, since contamination in the fluid flow is captured by the contaminant capturing filter element 20, even during long-term use, the orifice passage 22 is not clogged with contamination, and a stable throttle effect is obtained. Since the contaminant capturing filter element 20 is cylindrical and has a large surface area, it can withstand long-term use with respect to clogging.
[0048]
When the fluid flowing through the contaminant capturing filter element 20 is a gas-liquid mixed fluid, the gas particles in the gas-liquid mixed fluid are finely divided by passing through the contaminant capturing filter element 20, and the finely divided gas particles are Flow velocity resistance is larger than liquid, it tends to stagnate at the upper part due to buoyancy, it tends to become large due to recombination of gas particles during stagnation, and noise due to intermittent expansion and rupture of gas particles immediately after passing through the orifice (tilting noise) Occurs.
[0049]
On the other hand, the small-diameter dispersion communication hole 26 in which the passage for guiding the fluid from the contaminant trapping filter element 20 to the fluid flow noise reduction filter element 21 and the throttle passage member 23 is dispersed into a plurality of parts is provided. Since each of the dispersed communication holes 26 does not exhibit a large passage space, gas particles do not stay in each of the dispersed communication holes 26, and the gas particles do not enlarge. This avoids generating noise due to intermittent expansion and rupture of gas particles immediately after passing through the orifice, and further improves silentness.
[0050]
Further, the outer diameter of the contaminant trapping filter element 20 is substantially equal to the outer diameter of the plunger 32, and there is no large space above the valve chamber 14 where gas particles in the gas-liquid mixed fluid are enlarged. Gas particles do not accumulate in the upper part of the valve chamber 14. This also prevents the gas particles from being enlarged, prevents noise from being generated due to intermittent expansion and rupture of the gas particles immediately after passing through the orifice, and further improves silentness.
[0051]
FIG. 6 shows a second embodiment of the throttle valve device 10 according to the present invention. In FIG. 6, portions corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof is omitted.
[0052]
In this embodiment, a dispersion ejection member 28 having a plurality of ejection holes 27 (see FIG. 7) is attached downstream of the throttle passage member 23 and downstream of the fluid flow noise reduction filter element 24.
[0053]
In the case of the dispersed ejection member 28, the fluid is ejected from each of the plurality of ejection holes 27, so that the flow path length of the fluid flowing through the fluid flow noise reduction filter element 24 is smaller than in the case of a single hole. As a result, the effectiveness of the fluid flow noise reduction filter element 24 increases, and the effect of canceling out shock waves due to interference between the jet flows of the adjacent jet holes 27 can be obtained. Thereby, the quietness is further improved.
[0054]
Further, in the second embodiment, the concave portion 19A for forming a minute gap between the inner peripheral surface of the contaminant trapping filter element 20 and the dispersion communicating hole 26 in the peripheral groove 19 of the outer peripheral portion of the valve body 17. Is provided.
[0055]
Since the concave portion 19A is provided in the circumferential groove 19 on the outer peripheral portion of the valve element 17, the dispersion communication hole 26 and the contaminant trapping filter element 20 communicate with a small gap, and pass through the dispersion communication hole 26. The flow velocity of the refrigerant thus cooled is not reduced by the presence of the filter element 20 for trapping contaminants having a lower maximum permissible flow rate than the dispersion communication hole 26.
[0056]
Therefore, even if a solid contaminant called contamination mixed in the refrigerant tries to adhere to the inner wall of the dispersion communication hole 26, the dispersion communication hole is not reduced by the contaminant trapping filter element 20. The flow of the refrigerant that has passed through 26 prevents the dispersion communication hole 26 from actually adhering to the inner wall of the dispersion communication hole 26, thereby preventing the dispersion communication hole 26 from being clogged.
[0057]
The above-described concave portion 19A of the peripheral groove 19 on the outer peripheral portion of the valve element 17 can be similarly provided in the throttle valve device 10 in the embodiment shown in FIG. 1, and conversely, as shown in FIG. The recess 19A of the circumferential groove 19 in the outer peripheral portion of the valve element 17 provided in the throttle valve device 10 according to the second embodiment is different from the throttle valve device 10 according to the embodiment shown in FIG. If there is no, it can be omitted.
[0058]
FIG. 8 shows an air conditioner in which the throttle valve device 10 according to the first or second embodiment is incorporated as a cycle dry valve.
[0059]
This air conditioner includes a compressor 50, an outdoor heat exchanger 51, a first indoor heat exchanger 52, a second indoor heat exchanger 53, and refrigerant passages 55 to 63 for loop-connecting these. An expansion valve 54 provided in a refrigerant passage (57-59) between the outdoor heat exchanger 51 and the first indoor heat exchanger 52, and a refrigerant loop-connected for switching between a cooling mode and a heating mode And a four-way valve 64 for reversing the flow direction of the refrigerant in the passages 55 to 63.
[0060]
A throttle valve device (cycle dry valve) 10 is connected to the refrigerant passage 60 between the first indoor heat exchanger 52 and the second indoor heat exchanger 53.
[0061]
In the cooling mode, the refrigerant circulates in the direction indicated by the solid line arrow in FIG. 8 and the cooling mode is obtained in a state where the throttle valve device 10 is open, and the throttle valve device 10 is closed. In this state, the throttle valve device 10 functions as a throttle valve, and a cooling cycle dry mode (dehumidification during cooling) is obtained.
[0062]
In the cooling cycle dry mode, the contaminant trapping filter element 20 exists upstream from the orifice passage 22 of the throttle valve device 10 as viewed from the refrigerant flow. As a result, contamination in the refrigerant flow is captured on the upstream side of the orifice passage 22, so that the orifice passage 22 is not contaminated by the contamination, and the throttle effect may fluctuate even during long-term use. Therefore, the performance of the cooling cycle dry mode does not decrease.
[0063]
Further, the throttle valve device 10 is provided in an indoor unit of an air conditioner, and the throttle valve device 10 is provided with filter elements 21 and 24 for reducing fluid flow noise, or provided with a distributed communication hole 26. Since there is no large space above the valve chamber 14 where gas particles in the gas-liquid mixed fluid are enlarged, an unpleasant rubbing sound of the refrigerant or intermittent expansion and rupture of gas particles immediately after passing through the orifice. No noise due to noise.
[0064]
In the heating mode, the refrigerant circulates in the direction opposite to the direction indicated by the arrow in FIG. 8, and the throttle valve device 10 normally maintains the valve open state.
[0065]
【The invention's effect】
As can be understood from the above description, according to the throttle valve device of the present invention, contaminants such as contamination in a fluid flow are captured by the contaminant capturing filter element, and a throttle effect is obtained by the throttle passage member. The rectifying action is obtained by the fluid flow noise reduction filter element, and furthermore, the passage for guiding the fluid from the contaminant trapping filter element to the throttle passage member is a small-diameter dispersed communication hole dispersed in a plurality, Since the individual dispersion communication holes do not have a large passage space, the gas particles do not stay in the dispersion communication holes, and the gas particles do not enlarge, so that noise is generated due to intermittent expansion and rupture of the gas particles immediately after passing through the orifice. Without happening. Quietness is improved.
[0066]
Further, according to the air conditioner of the present invention, the above-described throttle valve device is connected between the first indoor heat exchanger and the second indoor heat exchanger. The dehumidifying operation is performed when the valve device is in the valve closed state. The throttle valve device incorporated in this air conditioner has a small fluid rubbing noise, does not generate noise due to the enlargement of gas particles, is excellent in quietness, does not contaminate the throttle portion by contamination, and has a long length. Even during use for a period, the throttle effect does not fluctuate, and the performance of the cooling cycle dry mode does not decrease.
[Brief description of the drawings]
FIG. 1 is a sectional view of a throttle valve device according to a first embodiment of the present invention in a valve closed state.
FIG. 2 is a plan view showing one embodiment of a throttle passage member used in the throttle valve device according to the present invention.
FIG. 3 is a plan view showing another embodiment of the throttle passage member used in the throttle valve device according to the present invention.
FIG. 4 is a plan view showing another embodiment of the throttle passage member used in the throttle valve device according to the present invention.
FIG. 5 is a plan view showing another embodiment of the throttle passage member used in the throttle valve device according to the present invention.
FIG. 6 is a sectional view of a throttle valve device according to a second embodiment of the present invention in a valve closed state.
FIG. 7 is a perspective view showing one embodiment of a dispersion ejection member used in the throttle valve device according to the present invention.
FIG. 8 is a block diagram showing an air conditioner incorporating the throttle valve device according to the present invention.
FIG. 9 is a partially enlarged plan view showing an example of a configuration of a sintered multilayer wire mesh usable for a filter element for reducing fluid flow noise and a filter element for capturing contaminants used in the embodiment of the throttle valve device according to the present invention. It is.
FIG. 10 is a partially enlarged view showing another example of the configuration of the sintered multilayer wire mesh usable for the filter element for reducing fluid flow noise and the filter element for capturing contaminants used in the embodiment of the throttle valve device according to the present invention. It is a top view.
[Explanation of symbols]
10 Throttle valve device
11 Valve housing
12 First entrance / exit port
13 Second entrance / exit port
14 Valve room
15 Valve port
16 Valve seat
17 Valve
19A recess
20 Filter elements for capturing contaminants
21 Filter element for reducing fluid flow noise
23 Throttle passage member
24 Filter element for reducing fluid flow noise
26 Distributed communication holes
28 Dispersion ejection member
30 Electromagnetic solenoid device
32 plunger
36 Electromagnetic coil
50 compressor
51 Outdoor heat exchanger
52 First indoor heat exchanger
53 Second indoor heat exchanger
54 expansion valve
64 four-way valve

Claims (10)

A first inlet / outlet port, a second inlet / outlet port, a valve chamber constantly communicating with the first inlet / outlet port, a valve port provided between the valve chamber and the second inlet / outlet port And a throttle valve device having a valve body provided in the valve chamber and opening and closing the valve port.
A mode in which a cylindrical contaminant trapping filter element is mounted around the outer periphery of the valve body, and one side of the valve body is in communication with the contaminant trapping filter element and the other side is in open communication with the valve port. A throttle passage member for performing a throttle action and a filter element for reducing fluid flow noise are arranged,
A passage connecting and communicating the contaminant trapping filter element and an arrangement portion of the throttle passage member and the fluid flow noise reducing filter element in the valve body is provided by a plurality of small-diameter dispersed communication holes. Throttle valve device. The filter element for reducing fluid flow noise is disposed on both the upstream side and the downstream side of the throttle passage member as viewed from the fluid flow, and the dispersed communication hole is directly or minutely connected to the filter element for capturing contaminants on one side. 2. The throttle valve device according to claim 1, wherein the throttle valve device communicates with a small gap and directly communicates with the fluid flow noise reduction filter element upstream of the throttle passage member. The pressure loss of each of the contaminant trapping filter element and the filter element for reducing fluid flow noise and the pressure loss of the entire dispersion communication hole are smaller than the pressure loss of the orifice member. The throttle valve device as described in the above. The fluid flow noise reduction filter elements are disposed on both the upstream and downstream sides of the throttle passage member when viewed in fluid flow, and each of these fluid flow noise reduction filter elements and the contaminant trapping filter element 4. The method according to claim 1, wherein the metal is made of any one of a sintered multilayer wire mesh, a porous sintered metal, a foamed metal or a porous metal body, and a plastic sintered porous body. Throttle valve device. The diaphragm according to any one of claims 1 to 4, wherein the filter element for reducing fluid flow noise and the filter element for capturing contaminants are formed of a filter material having a nominal filtration accuracy of 50 to 600 µm. Valve device. 6. A dispersion ejection member having a plurality of ejection holes, further downstream of the fluid flow noise reduction filter element downstream of the throttle passage member. The throttle valve device according to claim 1. An electromagnetic actuator for driving the valve element to open and close, wherein the valve element is fitted on a plunger chamber connected to the valve chamber at a side opposite to the valve port so as to be movable in the axial direction. The plunger of an actuator, wherein the filter element for capturing contaminants is mounted on a connecting portion between the valve body and the plunger, and has an outer diameter substantially equal to the outer diameter of the plunger. 7. The throttle valve device according to claim 6, wherein: The throttle valve device according to any one of claims 1 to 7, wherein the throttle passage member has a plurality of orifices provided in parallel with each other. A compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a refrigerant passage connecting them in a loop, the outdoor heat exchanger and the first indoor heat exchange 9. An expansion valve provided in a refrigerant passage between the first indoor heat exchanger and the second indoor heat exchanger. An air conditioner characterized by being connected to the throttle valve device described in (1). 10. The air conditioner according to claim 9, wherein the throttle valve device is connected such that the contaminant trapping filter element is located upstream of the throttle passage member when viewed from the refrigerant flow in the cooling mode. Machine.

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