JP2005083690A - Dehumidifying orifice device and air conditioner having the orifice device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems of being complicated in a structure, increasing part cost and assembling cost, and being inferior in reliability, which are possessed by a conventional dehumidifying orifice device capable of changing an orifice quantity in cooling type dehumidification and heating type dehumidification. <P>SOLUTION: This dehumidifying orifice device 7b is composed of a sleeve (a cylindrical pipe) 7b1, serially arranged two valve seats 73 and 74 fixed in the sleeve, and having respectively orifice holes 71 and 72 on the peripheral edge, and valve holes 73a and 74a in the center, and a loosely moving valve element 75 movably arranged by a refrigerant flow between the two valve seats. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a dehumidifying squeezing device for enabling a cooling and dehumidifying operation in which room air is heated by condensation heat of a refrigeration cycle, and an air conditioner including the same.

As a conventional air conditioner, there is one disclosed in Japanese Patent Laid-Open No. 54-47353. (Patent Document 1)
The air conditioner disclosed in Patent Document 1 includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a cooling / heating expansion device 6, an indoor heat exchanger, a dehumidifying expansion device, and the like connected by piping. Forming.

  The four-way valve 2 includes a cooling cycle in which the refrigerant discharged from the compressor 1 flows from the outdoor heat exchanger 3 to the indoor heat exchanger, and the refrigerant discharged from the compressor 1 from the indoor heat exchanger to the outdoor heat exchanger 3. It has the function to switch to the heating cycle that flows in

  The cooling / heating expansion device 6 is connected in parallel with the first electromagnetic valve 9 and provided between the outdoor heat exchanger 3 and the indoor heat exchanger so as to perform the expansion operation during the cooling / heating operation. The expansion device 5 is provided between the outdoor heat exchanger 2 and the indoor heat exchanger so as to be connected to the check valve 4 and perform the expansion operation during heating operation.

  Furthermore, the indoor heat exchanger is divided into a first indoor heat exchanger 7 and a second indoor heat exchanger 8.

  The dehumidifying squeezing device is provided between the first indoor heat exchanger 7 and the second indoor heat exchanger 8 so as to perform a squeezing action during the dehumidifying operation.

  And as the said dehumidifying throttle apparatus 5, the structure which connected the 2nd solenoid valve 11 and the capillary tube 10 in parallel is used.

  During the cooling operation, the first electromagnetic valve 9 is closed and the second electromagnetic valve 11 is opened so that the refrigerant flows through the cooling / heating expansion device 6, and during the heating operation, the first electromagnetic valve 9 and the second electromagnetic valve are opened. By opening the valve 11 and allowing the refrigerant to flow through the dehumidifying expansion device 5, an efficient operation can be performed by changing the amount of expansion during the cooling operation and the heating operation.

  Further, during the dehumidifying operation, the second electromagnetic valve 11 is closed to cause the refrigerant to flow through the capillary tube 10, and the first indoor heat exchanger 7 or the second indoor heat exchanger 8 is switched depending on whether it is air-cooling dehumidification or heating-air dehumidification. Either one serves as a condenser or a reheater.

  Further, as the dehumidifying squeezing device, as shown in FIG. 5, an electromagnetic valve 7a ′ and a dehumidifying squeezing device 7b ′ in which capillary tubes 71 ′, 72 ′, 73 ′ and a check valve 74 ′ are combined are provided. A parallel connection configuration is also used.

  The air conditioner shown in FIG. 5 is capable of efficient dehumidifying operation because the throttle amount is changed between cooling-like dehumidification and heating-like dehumidification.

  However, since the air conditioner shown in Patent Document 1 and FIG. 5 uses a capillary tube for the dehumidifying throttle device, noise due to the flow sound of the refrigerant flowing through the long capillary tube has been a problem.

  Moreover, in the air conditioner of patent document 1, since the same capillary tube is used as a dehumidifying throttling device for cooling and dehumidification, the amount of throttling cannot be changed, and an efficient dehumidifying operation cannot be performed. There's a problem.

Further, as the dehumidifying squeezing device, there is one disclosed in Japanese Patent Laid-Open No. 2003-65632. (Patent Document 2)
The dehumidifying throttling device disclosed in Patent Document 2 uses a pressure reducing device using an orifice instead of the capillary tube to reduce noise caused by refrigerant flow noise.

  However, the air conditioner of Patent Document 2 also uses the same decompression device as the deodorizing throttling device for the air-conditioning dehumidification and the heating-like dehumidification, so that the amount of throttling cannot be changed and an efficient dehumidifying operation cannot be performed. There is a problem.

  Therefore, it is conceivable to use the pressure reducing device using the orifice of Patent Document 2 instead of the capillary tube of the air conditioner shown in FIG. 5, but in this case, the number of parts is large and the assembly cost is high. There is.

A conventional air conditioner is also disclosed in Japanese Patent Application Laid-Open No. 2001-263858. (Patent Document 3)
The air conditioner of Patent Document 3 uses an electric expansion valve that opens and closes a valve with a stepping motor as the dehumidifying throttling device, so that the amount of throttling can be changed between cooling and dehumidification. This enables efficient dehumidifying operation.

However, since the air conditioner of Patent Document 3 uses an electric expansion valve that opens and closes a valve with a stepping motor, the structure is complicated, the cost is increased, and reliability is also problematic.
JP 54-47353 (page 2-3, Fig. 1) JP 2003-65632 A (page 4-8, FIG. 7) JP 2001-263858 A (page 5-10, FIG. 1)

  The present invention is a dehumidification that solves the problem that the structure of a conventional dehumidifying squeezing device that can change the squeezing amount between air-cooling dehumidification and heating-like dehumidification is complicated, the parts cost and assembly cost are high, and the reliability is poor. It is an object of the present invention to provide a diaphragm device and an air conditioner using the same.

  The present invention provides a free floating between a pair of valve seats formed in a pipe and a pair of valve seats formed in the pipe so as to face respective orifice holes having different flow resistances. A throttling device is constituted by a floating valve body that is freely disposed and has valve portions that close the valve hole formed at both ends.

  Further, the pipe is formed of a cylindrical sleeve having a reduced diameter on both sides, and the valve seat is formed in a bottomed cylindrical shape that is fixed to a central portion in the sleeve and is open on one side, and has a valve hole in the bottom portion. And an orifice hole, a valve hole mounted on one side of the body, and a stopper having an orifice hole.

  In the air conditioner including a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, a first indoor heat exchanger, and a second indoor heat exchanger, the first indoor heat exchanger The throttle device and the open / close valve are connected in parallel between the second indoor heat exchanger and an air conditioner.

  As described above, according to the present invention, the dehumidifying throttle device includes a pair of valve seats provided in a sleeve (cylindrical pipe), each having a valve hole at the center and an orifice hole at the periphery thereof, Since it is composed of floating valve elements that are movably arranged between the same pair of valve seats, the flow resistance can be varied by changing the length and diameter of each orifice hole or changing the chamfered shape of its open end. The amount of squeezing can be changed between the warming-down dehumidification and the heating-like dehumidification, and the cost can be reduced due to the simple structure.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  FIG. 1 is a sectional view showing an embodiment of a dehumidifying squeezing device according to the present invention.

  As shown in FIG. 1, the dehumidifying squeezing device 7b is formed into a sleeve (cylindrical pipe) 7b1 and a bottomed cylindrical shape with one side open, and a valve hole 74a is formed in the center of the bottom, and the periphery thereof is formed. A body 7b2 having an orifice hole 72, a valve hole 73a attached to one open side of the body 7b2, and a stopper 7b4 having an orifice hole 71 at the periphery thereof; and the body 7b2 is configured to be freely movable, and is composed of a floating valve body 75 and strainers 7b5 and 7b6 attached to both ends of the body 7b2. The body 7b2 is fixed in the sleeve 7b1 by caulking. It has become so.

  Both the orifice holes 71 and 72 have a hole length of about 5 times or more the hole diameter so that the refrigerant can be effectively throttled, and both have a hole diameter and its diameter so that the throttle amount differs between cooling dehumidification and heating dehumidification. It is formed so that there is a difference in distribution resistance by changing the length.

  Next, the assembly procedure of the dehumidifying squeezing device 7b will be described with reference to FIG.

  First, as shown in FIG. 1, the floating valve body 75 is mounted in the valve chamber from the opened side of the body 7 b 2. Next, the stopper 7b4 is mounted.

  At this time, the center lines of the orifice hole 72 provided in the body 7b2 and the orifice hole 71 provided in the stopper 7b4 are made to coincide.

  Next, the strainers 7b5 and 7b6 are fixed to the fixing portions 7b2 ′ and 7b2 ″ on both side ends of the body 7b2. Next, the body 7b2 to which these are mounted and fixed is inserted into the sleeve 7b1 and provided in the body 7b2. The assembly is completed by crimping and fixing to the shape fixing part 7b2 "'.

  The dehumidifying squeezing device 7b described above has a smaller number of parts than the prior art, can be reduced in size with a simple structure, and can be assembled in a simple procedure, thus saving space and reducing component costs and assembly costs. It is like that.

  FIG. 2 is a schematic system diagram of a refrigeration cycle showing an embodiment of an air conditioner equipped with a dehumidifying squeezing device according to the present invention, and FIGS. 3 and 4 are operation explanatory views showing operating states of the dehumidifying squeezing device.

  The refrigeration cycle has a variable capacity compressor 1 by rotation speed control, etc., a four-way valve 2 for switching between a cooling cycle and a heating cycle, an outdoor heat exchanger 3, a fully open state without a throttling action, and a wide range of throttling amount by a motor etc. The expansion device 4 of the electric expansion valve type that can be continuously changed by the indoor heat exchanger 5 (5a, 5b), the on-off valve 7a that switches between the cooling / heating operation and the dehumidifying operation, and the dehumidifying expansion device 7b. Connected by connecting piping.

  The cooling cycle is a cycle in which the refrigerant flow from the compressor 1 flows from the outdoor heat exchanger 3 to the indoor heat exchanger 5 (5a, 5b), and is applied in a cooling operation and a dehumidifying operation including a cooling taste. Is done.

  The heating cycle is a cycle in which the refrigerant flow from the compressor 1 flows from the indoor heat exchanger 5 (5a, 5b) to the outdoor heat exchanger 3, and is applied in a dehumidifying operation including a heating operation and a heating taste. Is done.

  The cooling / heating throttle device 4 is connected between the indoor heat exchanger 5 (5a, 5b) and the outdoor heat exchanger 3.

  The indoor heat exchanger 5 (5a, 5b) includes a first indoor heat exchanger 5a and a second indoor heat exchanger 5b having a smaller heat transfer area.

  Between the first indoor heat exchanger 5a and the second indoor heat exchanger 5b, there is an open / close valve 7a that has a very small flow resistance during cooling and heating operation and is fully closed during dehumidification operation, and dehumidification A dehumidifying squeezing device 7b that squeezes during operation is connected in parallel.

  In the dehumidifying operation, the dehumidifying operation by the cooling cycle (cooling dehumidifying operation) and the dehumidifying operation by the heating cycle (heating and dehumidifying operation) can be performed by the operations of the four-way valve 2, the dehumidifying throttle device 7b, and the cooling and heating throttle device 4.

  In the dehumidifying throttling device 7b, the valve holes are closed when the floating valve body 75 is seated on the valve seats 73 and 74, respectively, but the orifice holes 71 and the orifice holes 72 remain open. It has a structure.

  Next, the operation of the dehumidifying expansion device 7b during the dehumidifying operation will be described.

  FIG. 2 is an operation explanatory view showing the state of the dehumidifying squeezing device 7b during the heating and dehumidifying operation, and FIG. 3 is an operation explanatory view showing the state of the dehumidifying squeezing device 7b during the cooling and dehumidifying operation.

  First, the operation of the dehumidifying expansion device 7b during the heating and dehumidifying operation will be described with reference to FIGS.

  As shown in FIG. 1, the four-way valve 2 is switched to the heating cycle side, the on-off valve 7a is closed, and the compressor 1 is operated to start the heating and dehumidifying operation.

  When the heating and dehumidifying operation is started, the refrigerant flows from the first indoor heat exchanger 5a side to the second indoor heat exchanger 5b side as shown in FIG. 2 or FIG. The idle valve body 75 moves to the indoor unit 5 b side and sits on the valve seat 74.

  That is, as shown in FIG. 3, the refrigerant flowing in from the indoor heat exchanger 5a passes through the valve hole of the valve seat 73, and is then throttled by the orifice hole 72 and flows out to the indoor heat exchanger 5b side. .

  Next, the operation of the dehumidifying expansion device 7b during the cooling and dehumidifying operation will be described with reference to FIGS.

  The four-way valve 2 is switched to the cooling cycle side, the on-off valve 7a is closed, and the compressor 1 is operated to start the cooling and dehumidifying operation.

  When the cooling and dehumidifying operation is started, the refrigerant flows from the second indoor heat exchanger 5b side to the first indoor heat exchanger 5a side as shown in FIG. 2 or FIG. The plug 75 moves and sits on the valve seat 73.

  The refrigerant flowing in from the second indoor heat exchanger 5b side passes through the valve hole of the valve seat 74, is throttled by the orifice hole 71, and flows out to the first indoor heat exchanger 5a side.

  As described above, the right orifice hole 72 is throttled during the heating and dehumidifying operation, and the left orifice hole 71 is throttled during the cooling and dehumidifying operation. Therefore, the diameter and length of the orifice hole 72 and the orifice hole 71 are optimal. By designing it to be efficient, it is possible to perform efficient dehumidifying operation by varying the amount of throttling during both heating and dehumidifying operation.

It is a figure which shows the 2nd Example of the air conditioner by this invention, and is principal part side sectional drawing of the diaphragm | throttle device for dehumidification. 1 is a schematic system diagram of a refrigeration cycle showing an embodiment of an air conditioner according to the present invention. It is operation | movement explanatory drawing of the throttle apparatus for dehumidification of the air conditioner by this invention. It is operation | movement explanatory drawing of the throttle apparatus for dehumidification of the air conditioner by this invention. It is a schematic system diagram of the refrigerating cycle which shows the conventional air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Air-conditioning expansion / contraction apparatus 5a 1st indoor heat exchanger 5b 2nd indoor heat exchanger 6 Accumulator 7a On-off valve 7b Dehumidification expansion apparatus 71, 72 Orifice hole 73, 74 Valve seat 73a , 74a valve hole 75 floating valve body 7b1 sleeve (cylindrical pipe)
7b2 Body 7b2 ', 7b2 "Fixing part 7b2"' Groove fixing part 7b3 Plug 7b4 Stopper 7b5, 7b6 Strainer

Claims (3)

  Piping and a pair of valve seats formed in the piping, each with a valve hole drilled so that the orifice holes with different flow resistances face each other, and freely arranged between the same pair of valve seats A throttling device comprising: a floating valve body having valve portions for closing the valve hole formed at both ends.   The pipe is formed of a cylindrical sleeve having a reduced diameter on both sides, and the valve seat is formed in a bottomed cylindrical shape that is fixed to a central portion in the sleeve and is open on one side, and has a valve hole and an orifice at the bottom. 2. A throttle according to claim 1, comprising a body having a hole, and a stopper having a valve hole and an orifice hole mounted on one open side of the body. apparatus. In an air conditioner comprising a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, a first indoor heat exchanger, and a second indoor heat exchanger, the first indoor heat exchanger; The air conditioner, wherein the expansion device and the on-off valve are connected in parallel between the second indoor heat exchanger.


,

Images