JP3748953B2 - Motorized valve and absorption refrigerator using motorized valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric valve that opens and closes a liquid flow path and an absorption refrigerator that uses an electric valve to open and close an absorption liquid flow path. In the present invention, the electric valve is a general term including all on-off valves that open and close the valve body by an electric driving force by a rotational operation or a linear operation.
[0002]
[Prior art]
As this type of electric valve, as shown in FIG. 4, a valve mechanism portion 60 provided with a valve body 61 that opens and closes a flow path 71 of a liquid 70 provided inside a valve chamber 64, and a drive rod for the valve body 61. 62, a solenoid valve 200 provided with a drive mechanism portion 50 that is driven by a plunger 55 that moves inside the guide cylinder 56 by the magnetic force of the electromagnetic coil 52, or, for example, as shown in FIG. The drive rod 62 of the valve body 61 that opens and closes the flow path 71 is configured by a motor mechanism 86 that is driven by a motor 86 that rotates through a gear mechanism 85, for example, a gear mechanism by a rack 85A and a pinion 85B. Is well known.
[0003]
Further, in such an electric valve, the liquid 70 flowing through the flow path 70 contains a mixed agent such as an absorbent, such as a solution containing a mixed agent such as a refrigerant, for example, a thermal operation fluid in an absorption refrigerator. In the case where the drive rod 62 is driven, crystals of the admixture precipitate on the side of the drive mechanism portion 50 that drives the drive rod 62, or corrosion products, iron powder, welding sludge, etc. enter the drive rod 62, thereby inhibiting the movement of the drive rod 62. For this reason, there arises an inconvenience that the absorption refrigeration machine 100 causes an unexpected failure, for example, failure of switching between the cooling / heating operation and the heating operation.
[0004]
In order to eliminate this inconvenience, as shown in FIG. 4, a bellows-like diaphragm 80 is provided between the valve chamber 64 and the drive rod, and a pressure equalizing pipe 83 is provided to remove back pressure due to expansion and contraction of the diaphragm 80. A structure (hereinafter referred to as the first prior art) that is provided on the drive mechanism portion 50 side and connects the pressure equalizing pipe 83 to a gas having a pressure comparable to the pressure of the fluid 70, for example, a refrigerant vapor portion, is described in the present application. This is disclosed in Japanese Patent Application Laid-Open No. 8-128556 related to the applicant's application.
[0005]
Moreover, the structure which provided the motorized valve like FIG. 4, ie, the electromagnetic valve 200, in the required flow path of the absorption liquid in the absorption refrigeration machine 100 as shown in FIG. 6 (hereinafter referred to as the second prior art). Is disclosed in JP-A-8-128556.
[0006]
In FIG. 6, an absorption refrigerator 100 is an absorption refrigerator such as an absorption chiller / heater. For example, an absorption liquid such as a lithium bromide aqueous solution in which an absorbent is mixed with lithium bromide and a refrigerant is used as water is used. This is a well-known absorption refrigeration, where the thick solid line part is a liquid line for refrigerant liquid, absorption liquid, cooling water, etc., and the double line part is a vapor line for refrigerant vapor, that is, a gas line First, the circulation system of the absorbing liquid will be described with the low concentration absorbing liquid accumulated at the bottom of the absorber 1, that is, the dilute liquid 2a as a starting point.
[0007]
The dilute liquid 2a enters the heating tank 5A of the high-temperature regenerator 5 through the heat exchangers 3 and 4 by the pump P1. The high-temperature regenerator 5 includes a heating tank 5A and a separation tank 5C, and the dilute liquid 2a is heated by the heating tank 5A and sent to the separation tank 5C.
[0008]
The dilute liquid 2a having a high temperature is evaporated in the separation tank 5 so that the refrigerant contained in the dilute liquid 2a evaporates to a medium concentration absorbing liquid that has become a high temperature, that is, the intermediate liquid 2b and the refrigerant vapor. 7a.
[0009]
The high temperature intermediate liquid 2b passes through the heat exchanger 4 and enters the low temperature regenerator 11 to become the intermediate liquid 2c. The intermediate liquid 2c is heated in a pipe through which the refrigerant vapor 7a from the high-temperature regenerator 5 passes in the low-temperature regenerator 11, and becomes a high-concentration absorbing liquid, that is, concentrated liquid 2d, refrigerant vapor 7b, and To separate.
[0010]
The hot concentrated liquid 2d passes through the heat exchanger 3 and enters the spreader 1A in the absorber 1 and is sprayed from a number of holes in the spreader 1A. The sprayed concentrated liquid 2d is cooled in the absorber 1. Cooled by cooling water 31a flowing through the pipe 1B.
[0011]
Further, when the concentrated liquid 2d flows down the cooling pipe 1B, the concentrated liquid 2d absorbs the refrigerant vapor 7c entering from the adjacent evaporator 20 and dilutes to return to the low-temperature diluted liquid 2a. The absorption liquid circulation is repeated.
[0012]
Next, the refrigerant circulation system will be described starting from the refrigerant vapor 7 </ b> C that has entered the absorber 1. The refrigerant vapor 7c is absorbed by the concentrated liquid 2d dispersed from the spreader 1A in the absorber 1 as described in the above-described absorption liquid circulation system. The diluted liquid 2a that has absorbed the refrigerant is heated by the high-temperature regenerator 5, and the refrigerant vapor 7a is separated.
[0013]
The refrigerant vapor 7a enters the heat radiating pipe 11A of the low temperature regenerator 11, dissipates heat by applying heat to the intermediate liquid 2c, condenses into the refrigerant liquid 8a, and then enters the bottom of the condenser 15. Further, the condenser 15 cools the refrigerant vapor 7b entering from the adjacent low-temperature regenerator 11 with cooling water 31a passing through the cooling pipe 15A in the condenser 15, and condenses the refrigerant vapor 7b to cool the refrigerant vapor at a low temperature. 8a.
[0014]
The refrigerant liquid 8a enters the spreader 20A in the evaporator 20 and is spread into the evaporator 20 from a number of holes of the spreader 20A, and accumulates in the lower part of the evaporator 20 to become the refrigerant liquid 8b. This refrigerant liquid 8b is sent again to the spreader 20A by the pump P2, and repeatedly spread from the spreader 20A.
[0015]
The sprayed refrigerant liquid 8b cools the heat-treated fluid that passes through the heat exchange pipe 20B in the evaporator 20, that is, the cold / warm water 32a. At the time of this cooling, the refrigerant liquid 8b absorbs heat from the cold / warm water 32a and evaporates to become refrigerant vapor 7c, returns to the adjacent absorber 1 and completes the circulation of the refrigerant. Repeat.
[0016]
In addition, the high temperature regenerator 5 is also known in which the heating tank 5A and the separation tank 5C are integrated, and the intermediate liquid 2b and the refrigerant vapor 7a inside the high temperature regenerator 5 are under pressure. In addition, the refrigerant liquid 8b and the refrigerant vapor 7c inside the evaporator 20 are in an equilibrium state.
[0017]
As described above, by the double regeneration operation of the high-temperature regenerator 5 and the low-temperature regenerator 11, the heat exchange pipe 20B in the evaporator 20 is cooled / refrigerated by circulating the absorption liquid and the refrigerant, that is, the heat operation fluid. The operation of cooling the warm return water 32a, that is, the heated operation fluid, and supplying the cold water 32b to the cooling target device (not shown) such as the indoor air conditioner as the cooling heated operation fluid is a double-effect cooling operation. In other words, because it is mainly used for cooling, it is also called cooling operation.
[0018]
On the other hand, the high-temperature intermediate liquid 2b and the refrigerant vapor 7a inside the high-temperature regenerator 5 are directly returned to the absorber 1 by opening the on-off valve V1 and the refrigerant inside the evaporator 20 By opening the on-off valve V2 and returning the liquid 8b to the absorber 1, the evaporator is operated while only the high-temperature regenerator 5 is operated and only the high-temperature regenerator 5 is operated without using the low-temperature regenerator 11. The heat exchange pipe 20B in 20 heats the cold / warm water 32a, that is, the heated operation fluid, and heats the hot water 32b to a heating target device (not shown) such as an indoor air conditioner. The operation given as the operation fluid is referred to as a heating operation (boiler operation), and is also referred to as a heating operation because it is mainly used for heating.
[0019]
Further, during the heating operation, that is, during the heating operation, cooling of the absorber 1 and the condenser 15 is unnecessary, and therefore, the water supply of the cooling water 31a to the cooling pipe 1B and the cooling pipe 15A is stopped.
[0020]
In addition, the opening and closing valve V4 for returning the refrigerant liquid 8a directly to the evaporator 20 and the concentrated liquid 2d for returning the concentrated liquid 2d to the absorber 1 without passing through the spray pipe 1A during the heating operation, if necessary. An on-off valve V3 is provided.
[0021]
As the on-off valves V1, V2, V3, and V4 for switching between the cooling operation and the heating operation, an electric valve having a configuration as shown in FIG. The outlet 65 and the pressure equalizing pipe 83 are connected to a required location.
[0022]
[Problems to be solved by the invention]
In the structure of the electric valve according to the first prior art as described above, that is, the electromagnetic valve 200, the bellows-like diaphragm 80 is provided in the valve chamber 64, so that the substantial volume of the valve chamber and the valve body 61 are provided. Therefore, it is not suitable for the absorption refrigerator 100 having a large circulating capacity of the absorbing liquid, and is provided on the wall 64A of the valve chamber 64 as in the motor-operated valve 300 of FIG. A drive rod 62 that is passed through an airtight penetrating portion 66, that is, an airtight member 66A, for example, an airtight penetrating portion with O-ring packing, is driven by a drive mechanism portion 50 provided outside the valve chamber 64. It is necessary to use the thing of the structure to do.
[0023]
However, when the electric valve having such a configuration is used, the outside of the penetrating portion 66 is outside air, and therefore the liquid 70 adhering to the airtight member 66A, for example, packing or the like by the movement of the drive rod 62 is increased. In the same way, corrosion products, iron powder, welding sludge, etc. in the liquid 70 adhering to the liquid 70 are solidified to inhibit the movement of the drive rod 62 or destroy the airtight structure. For this reason, the absorption refrigerator 100 has an inconvenience that it causes an unexpected failure, for example, a failure such as switching between the cooling / heating operation and the heating operation becomes impossible.
[0024]
For this reason, there exists a subject that provision of the absorption refrigeration machine using an electric valve and an electric valve without such an inconvenience is desired.
[0025]
[Means for Solving the Problems]
The present invention, Ri by the moving the valve element by a drive rod which passes through the setting digit penetrating portion in the wall of the valve chamber as described above, as well as opening and closing a flow path of containing mixed agent liquids, the In the electric valve that drives the drive rod of the motor by electric power,
[0026]
An airtight member is provided in the penetrating portion, and an airtight chamber is provided between the wall portion outside the penetrating portion and the driving rod, and a diaphragm that is deformed with the movement is provided. An airtight chamber forming means;
By providing a flow path for connecting the airtight chamber with the liquid vapor portion disposed on the downstream side of the liquid, a crystal of the admixture is formed on the airtight member portion. A first structure for providing a crystal precipitation preventing means for preventing the precipitation of
[0027]
The absorption liquid, the portion carrying the refrigerant vapor, in order to please the flow, more to move the valve element by a drive rod which passes through the through portion digits set in the wall of the valve chamber, the flow of the absorption liquid In the absorption refrigeration machine provided with an electric valve that opens and closes the path and drives the drive rod by electric power,
[0028]
An airtight member is provided in the penetrating portion, and an airtight chamber is provided between the wall portion outside the penetrating portion and the driving rod, and a diaphragm that is deformed with the movement is provided. An airtight chamber forming means;
By providing a flow path for connecting the airtight chamber and the refrigerant vapor portion disposed on the downstream side of the liquid, the admixture of the absorbing liquid is provided in the airtight member portion. The above-mentioned problem is solved by a second configuration provided with a crystal precipitation preventing means for preventing the precipitation of crystals .
[0029]
DETAILED DESCRIPTION OF THE INVENTION
As an embodiment of the present invention, an example in which the present invention is applied to the configuration of a motor-operated valve similar to the motor-operated valve 300 of FIG. 5 and the configuration of the absorption refrigerator 100 of FIG. 6 will be described.
[0030]
【Example】
Examples will be described below with reference to FIGS. In these drawings, the parts denoted by the same reference numerals as those in FIGS. 4 to 6 are the parts having the same functions as the parts having the same reference numerals described in FIGS. 4 to 7, and in FIGS. The parts indicated by the same reference numerals are parts having the same functions as the parts indicated by the same reference numerals described in any of FIGS.
[0031]
[First embodiment]
First, as a first embodiment, an embodiment of a motor-operated valve 300 will be described with reference to FIG. In FIG. 1, a portion different from the motor-operated valve 300 in FIG. 5 is that a portion where the gear mechanism 85 is a gear mechanism using a small bevel gear 85C and a large bevel gear 85D and a moving mechanism of the drive rod 62 are held by a bearing 85E. The screw shaft 62B is rotated by the large bevel gear 85D so that the screw shaft 62B is inserted into and moved from the screw hole 62A provided in the drive rod 62, and the outer wall portion 64A of the penetrating portion 33. The position of the airtight chamber 81A provided with the diaphragm 80A that is deformed with the movement of the valve body 61, that is, the movement of the drive rod 62, and the airtight chamber 81 are formed between the valve body 61 and the drive rod 62. And a portion where a pressure equalizing pipe 83A is provided as a flow path for connecting a gas portion (not shown) disposed on the downstream side of the liquid 70.
[0032]
Specifically, the diaphragm 80A is a bellows in which a thin metal material, for example, a thin stainless steel material, is formed in a bellows shape, and one end side thereof is an overhang portion 62C of the drive rod 62 and the other end side. Are formed on the open end 87A of the cylinder 87 that is airtightly fixed to the wall portion 64A, respectively, by airtightly fixing by brazing or welding.
[0033]
Each component has a packing (see Fig. 4) where airtight and thin cross-hatched portions are cross-sectioned and left-trimmed thin-line hatched portions are separately integrated. (Not shown) is provided and fixed.
[0034]
A required speed reduction mechanism is incorporated in the electric motor 86 fixed to the mounting frame 84. When the small bevel gear 85C fixed to the rotating shaft 86A of the electric motor 86 rotates, the screw shaft fixed to the large bevel gear 85D. Since 62B rotates and the screw shaft 62B is inserted into and removed from the screw hole 62A, the portion with the thin line hatching inclined downward to the right moves, so that the valve body 61 opens and closes with respect to the valve seat 61A. It will be.
[0035]
Therefore, the outside of the airtight member 66A is not directly exposed to the outside air, and the gas disposed on the downstream side of the liquid 70 between the outside of the airtight member 66A and the outside air , that is, the vapor of the liquid 70 Since the airtight chamber 81A filled with is interposed, crystals of the admixture in the liquid 70 are deposited on the portion of the airtight member 66A, and corrosion products, iron powder, welding sludge, etc. in the liquid 70 are present. The solidification prevents the movement of the drive rod 62 or destroys the airtight structure, and even if the liquid 70 leaks outside the airtight member 66A, the downstream gas That is, since it is absorbed by the vapor of the liquid 70, it is possible to prevent an unexpected failure in the absorption refrigerator 100, for example, a failure such as switching between the cooling / heating operation and the heating operation becoming impossible.
[0036]
[Second Embodiment]
Next, as a second embodiment, an embodiment of a motor-operated valve 300 different from FIG. 1 will be described with reference to FIG. 2 differs from the motor-driven valve 300 of FIG. 5 in that the valve body 61 is moved between the wall portion 64A outside the penetrating portion 33 and the drive rod 62, that is, the drive rod 62 is moved. The portion of the airtight chamber 81A provided with the separating membrane 80A is formed, and in the airtight chamber 81, a gas portion (not shown) arranged on the downstream side of the airtight chamber 81A and the liquid 70 having an equilibrium state with the pressure of the liquid 70. The pressure equalizing pipe 83A is provided as a flow path for connecting the
[0037]
Specifically, the diaphragm 80A is the same as the diaphragm 80A in FIG. 1, and one end side is airtight to the overhanging portion 62C of the drive rod 62 and the other end side is airtight to the wall portion 64A. An airtight chamber 80A is formed on the open end side 87A of the cylindrical body 87 fixed in a shape by fixing it in an airtight manner by brazing or welding.
[0038]
Each component has a packing (see Fig. 4) where airtight and thin cross-hatched portions are cross-sectioned and left-trimmed thin-line hatched portions are separately integrated. (Not shown) is provided and fixed.
[0039]
A required speed reduction mechanism is incorporated in the electric motor 86, and when the pinion 85B fixed to the rotating shaft 86A of the electric motor 86 rotates, the rack 85A supported by the penetrating portion 33 and the bearing 85F moves. Since the portion hatched with the fine line hatching to the right is moved, the valve body 61 is opened and closed with respect to the valve seat 61A.
[0040]
Therefore, as in the case of the first embodiment, the outside of the airtight member 66A is not directly exposed to the outside air, and is arranged on the downstream side of the liquid 70 between the outside of the airtight member 66A and the outside air. Since the airtight chamber 81A filled with the gas, that is, the vapor of the liquid 70 is interposed, the same effect as that of the first embodiment can be obtained, and the number of constituent members is smaller than that of the first embodiment. It can be configured simply and inexpensively.
[0041]
[Summary of the configuration of the first and second embodiments]
To summarize the configuration of the first and second embodiments,
Ri by the moving the valve body 61 by a drive rod 62 which passes through the through portion 66 digits set in the wall portion 64A of the valve chamber 64, thereby opening and closing a flow path 71 of the liquid body 70 containing a mixing agent, in the the drive rod 62, for example, an electric valve to thus drive the electric force that by the electric motor 86, for example, in an electric valve 300,
[0042]
An airtight member 66A is provided in the penetrating portion 66, and a diaphragm that deforms with the movement between the wall portion 64A outside the penetrating portion 66 and the driving rod 62, for example, An airtight chamber forming means for forming an airtight chamber 81A provided with a bellows diaphragm 80A;
An airtight chamber 81A of the flow path for connecting a portion of the vapor 75 of the liquid 70 disposed on the downstream side of the liquid 70, for example, by providing a pressure equalizing pipe line 83A, the above airtight This constitutes a first configuration in which a crystal precipitation preventing means for preventing the crystals of the admixture from precipitating on the member 66A is provided.
[0043]
[Third embodiment]
Next, as a third embodiment, an embodiment of the absorption refrigeration machine 100 using the motor operated valve according to the first embodiment and the second embodiment, that is, the motor operated valve 300 will be described with reference to FIG.
[0044]
3 differs from the configuration of FIG. 7 in that the motor-operated valve 300 according to the configuration of the first embodiment or the second embodiment is used as the on-off valves V1, V2, V3, and V4. The pressure line 83A is in an equilibrium state with respect to the absorbing liquid corresponding to the liquid 70 flowing into the inflow port 63, and is connected to a gas disposed downstream of the absorbing liquid, that is, a refrigerant vapor portion. This is the place that was constructed.
[0045]
Specifically, in the on-off valve V1, the inlet 63 is connected to the intermediate liquid 2b portion, and the pressure equalizing pipe 83A is connected to the refrigerant vapor 7c portion on the bottom side of the absorber 1, for example. . In the on-off valve V2, the inflow port 63 is connected to the portion of the refrigerant liquid 8b, and the pressure equalizing pipe 83A is connected to the portion of the refrigerant vapor 7c on the bottom side of the evaporator 20, for example.
[0046]
In the on-off valve V3, the inlet 63 is connected to the portion of the concentrated liquid 2d in the pipe downstream of the heat exchanger 3, and the pressure equalizing pipe 83A is connected to, for example, the refrigerant vapor 7c on the bottom side of the absorber 1. Is connected to the part. In the on-off valve V4, the inlet 63 is connected to the refrigerant liquid 8a, and the pressure equalizing pipe 83A is connected to, for example, the refrigerant vapor 7c of the absorber 1.
[0047]
Therefore, as in the case of the first embodiment, the outside of the airtight member 66A is not directly exposed to the outside air, and is in equilibrium with the liquid 70 between the outside of the airtight member 66A and the outside air. Since the airtight chamber 81A filled with gas, that is, the vapor of the liquid 70 is interposed, the same effect as the first embodiment can be obtained.
[0048]
[Summary of Configuration of Third Embodiment]
To summarize the configuration of the third embodiment,
Absorbing liquid, for example, a concentrated solution 2a · intermediate liquid 2b · coolant liquid 8a · refrigerant liquid 8b, the portion carrying the refrigerant vapor 7c, in order to please the flow, transmembrane portion digits set in the wall portion 64A of the valve chamber 64 more to the drive rod 62 passing through the 66 to move the valve body 61, thereby opening and closing a flow path 71 of the absorption liquid, the electric power of the above drive rod 62, for example, is driven by an electric force by the electric motor 86 In the absorption refrigerator 100 provided with the electric valve 300,
[0049]
An airtight member 66A is provided in the penetrating portion 66, and a diaphragm that deforms with the movement between the wall portion 64A outside the penetrating portion 66 and the driving rod 62, for example, An airtight chamber forming means for forming an airtight chamber 81A provided with a bellows diaphragm 80A;
By providing a flow path for connecting the airtight chamber 81A and the portion of the refrigerant vapor 7c disposed on the downstream side of the liquid 70, for example, a pressure equalizing pipe 83A, the airtight member This constitutes a second configuration in which the crystal precipitation preventing means for preventing the admixture crystal of the absorption liquid from being precipitated is provided at the portion 66A .
[0050]
[Modification]
The present invention includes the following modifications.
(1) The diaphragm 80A is made of a synthetic resin material, and the diaphragm 80A is fixed to a required place by the same mounting structure as that of the first prior art, for example.
[0051]
(2) The shape of the diaphragm 80A is not an accordion shape but an appropriate curved shape.
(3) The part where the pressure equalizing pipe 83A is provided is changed to another part of the airtight chamber 81A.
[0052]
(4) The drive mechanism portion 50 constituted by the electric motor 86 and the gear mechanism 85 is changed to a drive mechanism using an electromagnetic coil and a plunger similar to the first prior art.
[0053]
(5) The drive mechanism portion 50 including the electric motor 86 and the gear mechanism 85 is changed to a linearly operated electric motor, that is, a drive mechanism using a linear motor.
[0054]
(6) A required on-off valve of the on-off valves V1, V2, V3, and V4, for example, only the on-off valve V1, is configured by applying the electric valve according to the first configuration.
[0055]
【The invention's effect】
According to the present invention, as described above, the first configuration and the second configuration, the outside of the airtight member, comprises a gas which is disposed downstream of the liquid containing the mixed agent, i.e., a mixed agent Because there is an airtight chamber filled with liquid vapor, the drive rod moves due to the precipitation of contaminant crystals and the solidification of corrosion products, iron powder, welding sludge, etc. Inhibition and destruction of the airtight structure can be prevented, and even if the liquid leaks to the outside of the airtight member, it can be absorbed into the gas on the downstream side , that is, the liquid vapor containing the contaminant. .
[0056]
Furthermore, in the third configuration, although the flow path of the absorbing liquid is opened and closed, the switching between the cooling / heating operation and the heating operation cannot be performed because the first configuration and the second configuration are used. There is an advantage that an absorption refrigerator that can prevent breakdowns can be provided.
[Brief description of the drawings]
In the drawings, FIGS. 1 to 3 show an embodiment of the present invention, and FIGS. 4 to 6 show the prior art. The contents of each figure are as follows.
[Fig. 1] Main configuration vertical section [Fig. 2] Main configuration vertical cross section [Fig. 3] Overall block configuration [Fig. 4] Main configuration vertical cross section [Fig. 5] Main configuration vertical cross section [Fig. 6] Overall block diagram [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Absorber 1A Spreading pipe 1B Cooling pipe 2a Diluted liquid 2b Intermediate liquid 2c Intermediate liquid 2d Concentrated liquid 3 Heat exchange pipe 4 Heat exchange pipe 5 High temperature regenerator 5A Heating tank 5C Separation tank 7a Refrigerant vapor 7b Refrigerant vapor 7c Refrigerant vapor 8a Refrigerant Liquid 8b Refrigerant liquid 11 Low temperature regenerator 11A Radiator pipe 15 Condenser 15A Cooling pipe 20 Evaporator 20A Spreading pipe 20B Heat exchange pipe 31a Cooling water 32a Cold / warm water 32b Cold / hot water 50 Drive mechanism portion 52 Electromagnetic coil 55 Plunger 56 Guide cylinder 60 Valve mechanism portion 61 Valve body 61A Valve seat 62 Drive rod 62A Screw hole 62B Screw shaft 62C Overhang portion 63 Inlet 64 Valve chamber 64A Wall portion 65 Outlet 66 Through portion 66A Airtight member 70 Liquid 71 Channel 75 Gas 80 Diaphragm 80A Diaphragm 81 Airtight chamber 81A Airtight chamber 83 Pressure equalizing tube 83A Pressure equalizing tube 84 Mounting frame 85 Gear mechanism 85A 85B Pinion 85C Small bevel gear 85D Large bevel gear 85E Bearing 85F Bearing 86 Electric motor 86A Rotating shaft 87 Cylindrical body 87A Open end 100 Absorption refrigeration machine 200 Electromagnetic valve 300 Electric valve P1 Pump P2 Pump V1 On-off valve V2 On-off valve V3 On-off valve V4 open / close valve

Claims (2)

Ri by the moving the valve element by a drive rod which passes through the through portion digits set in the wall of the valve chamber, thereby opening and closing a flow path of containing mixed agent liquids, driving the drive rod by an electric force An electric valve,
An airtight chamber forming means for forming an airtight chamber in which an airtight member is provided in the penetrating portion, and a diaphragm that is deformed with the movement is provided between the wall portion outside the penetrating portion and the drive rod; ,
By providing a flow path for connecting the hermetic chamber and a portion of the liquid vapor disposed on the downstream side of the liquid , crystals of the admixture are deposited on the portion of the hermetic member. An electrically operated valve comprising: crystal precipitation preventing means for preventing . The absorption liquid, the portion carrying the refrigerant vapor, in order to please the flow, more to move the valve element by a drive rod which passes through the through portion digits set in the wall of the valve chamber, the flow passage of the absorbing liquid And an absorption refrigeration machine provided with an electric valve that drives the drive rod with electric force,
An airtight chamber forming means for forming an airtight chamber in which an airtight member is provided in the penetrating portion, and a diaphragm that is deformed with the movement is provided between the wall portion outside the penetrating portion and the drive rod; ,
By providing a flow path for connecting the airtight chamber and the portion of the refrigerant vapor disposed on the downstream side of the liquid , crystals of the admixture of the absorbing liquid are deposited on the portion of the airtight member. An absorption refrigerator comprising: crystal precipitation preventing means for preventing this .

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