JPH08128556A - Solenoid valve and absorption refrigerating machine using it - Google Patents

Abstract

PURPOSE: To prevent an accident in which operation of a solenoid valve opening/closing a flow passage for fluid deteriorates because of foreign matter contained in the fluid and required operation of an absorption refrigerating machine and the like using the solenoid cannot be carried out. CONSTITUTION: A valve element 61 opens/closes a flow passage 71, which is arranged in the inside of a valve chamber 64, for fluid 70. The valve element 61 is driven by means of a plunger 55 moving inside a guiding cylinder 56 by means of magnetic force of a solenoid coil 52. A diaphragm 80, which is deformed according to the shift of the valve element 61, is arranged between the valve chamber 64 and the guiding cylinder 56, and an airtight chamber 81 consisting of the guiding cylinder 56 and the diaphragm 80 is formed. An equalizing pipe line 83 for introducing gas 75, whose pressure is balanced with that of the fluid 70, to the airtight chamber 81 is arranged. As a foreign matter in the fluid 70 is prevented from penetrating into a clearance 58 or the like by means of the diaphragm 80, defective opening/closing action can be prevented. For pressures in the airtight chamber 81 and the valve chamber 64 are equalized, the diaphragm 80 can be thinned, while magnetic force of the solenoid coil 52 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic valve that opens and closes a liquid flow path and an absorption refrigerator that opens and closes an absorbent liquid flow path using the electromagnetic valve.

[0002]

2. Description of the Related Art An electromagnetic valve of this type is a solenoid valve in which a valve body provided inside a valve chamber for opening and closing a flow path of a liquid is driven by a plunger moving inside a guide cylinder by the magnetic force of an electromagnetic coil, That is, an electromagnetic plunger type electromagnetic valve is well known, and there is, for example, a structure such as the electromagnetic valve 200 of FIG. 6 (hereinafter, referred to as a first conventional technique).

In FIG. 6, a drive mechanism portion 50 is for opening and closing a valve body 61 provided in a valve chamber 64 of a valve mechanism portion 60 by a plunger that moves by an electromagnetic force, and a magnetic path forming yoke. An electromagnetic coil 52 is provided inside a cover 51 that also serves as a coil. When a current is applied to the electromagnetic coil 52 from a conductive wire 53 to excite the electromagnetic coil 52, the magnetic force generated in the central portion of the electromagnetic coil 52 causes the plunger 55 to move to the spring 54. It is designed to suck against.

Since the plunger 55 is integrated with the valve body 61 of the valve mechanism portion 60, when the plunger 55 is attracted by excitation, the valve body 61 separates from the valve seat 62,
When the valve is opened and the excitation is cut off, the valve body 61 is pushed back together with the plunger 55 by the spring 54, the valve body 61 is pressed against the valve seat 62, and the valve is closed.

When the valve body 61 is in the open state, a flow passage 71 is formed in which the liquid 70 entering from the inflow port 63 passes between the valve body 61 and the valve seat 62 and flows out to the outflow port 65. However, when the valve body 61 is in the closed state, the flow passage 71 is closed, so that the liquid 70 is sealed in the valve chamber 64 and cannot flow out to the outflow port 65 side.

[0006] The guide cylinder 56 is formed in a watertight cylindrical chamber so as to guide the plunger 55 in and out and prevent the liquid 70 entering from the valve chamber 64 side from leaking to the outside.

Therefore, in order to reduce the resistance against the movement of the plunger 55 in and out, the liquid 70 passes through the gap 58 between the inner wall portion of the guide cylinder 56 for guiding the movement of the plunger 55 and the plunger 55, and is located on the spring 54 side. The back pressure with respect to the movement of the plunger 55 is removed so that the chamber 55 can be moved in and out.

It should be noted that, between the respective constituent members, required joints are appropriately assembled by forming a watertight structure (not shown) and screwing (not shown).

In addition, as an absorption type refrigerator such as an absorption type chiller / heater using the solenoid valve 200, for example, an absorption liquid such as an aqueous lithium bromide solution in which an absorbent is lithium bromide and a refrigerant is water is used. Absorption refrigerators are well known, and there is, for example, a structure such as the absorption refrigerator 100 shown in FIG. 7 (hereinafter, referred to as a second related art).

In FIG. 7, a thick solid line portion is a liquid pipeline for a refrigerant liquid / absorption fluid / cooling water, and a double line portion is a vapor pipeline for a refrigerant vapor, that is, a gas pipeline. The circulation system will be described starting from the low-concentration absorption liquid accumulated at the bottom of the absorber 1, that is, the diluted liquid 2a.

The rare liquid 2a enters the heating tank 5A of the high temperature regenerator 5 via the heat exchangers 3 and 4 by the pump P1. The high temperature regenerator 5 is composed of a heating tank 5A and a separation tank 5C, and heats the dilute liquid 2a in the heating tank 5A and sends it to the separation tank 5C.

The dilute liquid 2a having a high temperature is absorbed in the separation tank 5 by the evaporation of the refrigerant contained in the dilute liquid 2a so that the dilute liquid 2a has a high temperature, that is, the intermediate liquid 2b. , Refrigerant vapor 7a.

The high temperature intermediate liquid 2b passes through the heat exchanger 4,
It enters the low-temperature regenerator 11 and becomes the intermediate liquid 2c. Intermediate liquid 2c
Is the refrigerant vapor 7 from the high temperature regenerator 5 in the low temperature regenerator 11.
The liquid is separated into a high-concentration absorbent, that is, a high-concentration liquid 2d and a refrigerant vapor 7b, which have been heated by the pipe through which a has become high temperature.

The hot concentrated liquid 2d enters the sprayer 1A in the absorber 1 through the heat exchanger 3 and is sprayed from a large number of holes of the sprayer 1A. The sprayed concentrated liquid 2d is absorbed in the absorber 1a. It is cooled by the cooling water 31a flowing through the internal cooling pipe 1B.

Further, when the concentrated liquid 2d flows down the outside of the cooling pipe 1B, the concentrated liquid 2d absorbs the refrigerant vapor 7c coming from the adjacent evaporator 20 to be diluted, and returns to the low temperature diluted liquid 2a. The circulation of the absorbing liquid is repeated to complete one cycle.

Next, the circulation system of the refrigerant will be described with the refrigerant vapor 7C having entered the absorber 1 as the starting point. The refrigerant vapor 7c is
As described in the absorbent circulation system, the concentrated liquid 2d is absorbed from the sprayer 1A in the absorber 1. The diluted liquid 2a that has absorbed the refrigerant is heated by the high-temperature regenerator 5 and the refrigerant vapor 7a is separated.

The refrigerant vapor 7a enters the radiating pipe 11A of the low temperature regenerator 11, gives heat to the intermediate liquid 2c to radiate the heat, condenses into the refrigerant liquid 8a, and then enters the bottom of the condenser 15.
The condenser 15 cools the refrigerant vapor 7b entering from the adjacent low-temperature regenerator 11 with the cooling water 31a passing through the cooling pipe 15A in the condenser 15, condenses the refrigerant vapor 7b, and cools the low-temperature refrigerant liquid. 8a.

The refrigerant liquid 8a is distributed to the sprayer 20 in the evaporator 20.
A, and is sprayed into the evaporator 20 through a number of holes of the sprayer 20A, and accumulates in the lower part of the evaporator 20 to become the refrigerant liquid 8b. The refrigerant liquid 8b is sent to the sprayer 20A again by the pump P2, and is repeatedly sprayed from the sprayer 20A.

The sprayed refrigerant liquid 8b cools the heated operating fluid passing through the heat exchange tube 20B in the evaporator 20, that is, the cold / hot return water 32a. During this cooling, the refrigerant liquid 8b
The refrigerant absorbs heat from the cold / warm water 32a and evaporates, and the refrigerant vapor 7
At c, the refrigerant returns to the adjacent absorber 1 and repeats the circulation of the refrigerant in which the circulation of the refrigerant is completed.

The high temperature regenerator 5 is also well known in which the heating tank 5A and the separation tank 5C are integrally structured.
Further, the intermediate liquid 2b and the refrigerant vapor 7a in the high temperature regenerator 5 are in a pressure equilibrium state, and the refrigerant liquid 8b and the refrigerant vapor 7c in the evaporator 20 are in a pressure equilibrium state. It is what is done.

As described above, the double regeneration operation of the high-temperature regenerator 5 and the low-temperature regenerator 11 causes the heat exchange pipe 20B in the evaporator 20 to circulate the absorbing liquid and the refrigerant, that is, the heat-operated fluid. The operation of cooling the cold / hot return water 32a, that is, the heated operating fluid and giving the cold water 32b to a device to be cooled (not shown) such as an indoor air conditioner as the cooled operating fluid for cooling, has a double effect. It is called cooling operation, and is also called cooling operation because it is mainly used for cooling.

On the other hand, the high temperature intermediate liquid 2b and the refrigerant vapor 7a in the high temperature regenerator 5 are directly returned to the absorber 1 by opening the open / close valve V1 and the evaporator 2
The refrigerant liquid 8b inside the cylinder 0 is returned to the absorber 1 by opening the on-off valve V2, so that the operation of only the high-temperature regenerator 5 without using the low-temperature regenerator 11 causes the circulation of the absorbent and the circulation of the refrigerant. And the heat exchange tube 20B in the evaporator 20.
The operation of heating the cold / warm water 32a, that is, the heated operating fluid and applying the hot water 32b to a device to be heated (not shown) such as an indoor air conditioner as a heated operating fluid for heating, It is called heating operation (boiler operation) and is also called heating operation because it is mainly used for heating.

Further, during the heating operation, that is, during the heating operation, cooling of the absorber 1 and the condenser 15 is unnecessary,
The water supply of the cooling water 31a to the cooling pipe 1B and the cooling pipe 15A is stopped.

The solenoid valve 200 is used as the opening / closing valves V1, V2, V3, and V4 for switching between the cooling operation and the heating operation.

[0025]

The solenoid valve 200 according to the first prior art as described above includes a mixing agent such as an absorbent like the heat-operated fluid in the absorption refrigerator 100 according to the second prior art. When used in a liquid flow path,
The crystallized admixture may enter between the plunger 55 and the inner wall portion of the guide cylinder 56, and corrosion products, iron powder, welding sludge, etc. may enter.
There is an inconvenience that the entrance / exit operation is blocked and the opening / closing operation of the valve body 61 is disabled, resulting in an unexpected failure of the absorption chiller 100, for example, failure of switching between cooling and heating.

In order to eliminate this inconvenience, a diaphragm, that is, a diaphragm is provided between the guide cylinder 56 and the valve chamber 64 to block the liquid 70, and the guide cylinder 56 is configured as an open chamber so as to communicate with the outside air. However, in this configuration, since the pressure difference between the liquid 70 and the outside air becomes large, the pressing force of the spring 54 is made very large and the diaphragm is strong enough to withstand the pressure difference. There is a need to.

Therefore, the strength of the magnetic force for attracting the plunger 55 must be very large so as to oppose the strength of the spring and the strength of the diaphragm.

Therefore, there is a problem that it is desired to provide an electromagnetic valve and an absorption type refrigerator using the electromagnetic valve that do not have such inconvenience.

[0029]

According to the present invention, a valve body for opening and closing a liquid flow path provided inside a valve chamber as described above is driven by a plunger that moves inside a guide cylinder by the magnetic force of an electromagnetic coil. In the solenoid valve that

An airtight chamber forming means for forming an airtight chamber by the guide cylinder and the diaphragm by providing a diaphragm that deforms with the movement, between the valve chamber and the guide cylinder.

A pressure equalizing means for equalizing the pressure in the airtight chamber and the valve chamber by providing a flow path for guiding the gas whose pressure is in equilibrium with the liquid to the airtight chamber is provided. 1 configuration,

A valve body, which is connected to a device containing a liquid in which a liquid surface that moves up and down freely is contained, by piping to open and close the flow path of the liquid provided inside the valve chamber, and a magnetic force of an electromagnetic coil. In a solenoid valve equipped with a plunger for moving the inside of the guide cylinder to drive the above valve body,

A diaphragm, which is provided between the valve chamber and the guide cylinder and is deformed by the movement, an airtight chamber formed by the guide cylinder and the diaphragm, and an upper part of the liquid surface. A second structure in which a pressure equalizing pipe connected between the gas portion and the airtight chamber is provided;

The above is provided inside the valve chamber, which is connected to equipment such as a regenerator, a condenser, an evaporator and an absorber of an absorption refrigerating machine that stores a liquid in which a liquid surface that moves freely up and down is formed. In a solenoid valve having a valve body for opening and closing the liquid flow path, and a plunger for moving the inside of the guide cylinder by the magnetic force of the electromagnetic coil to drive the valve body,

A third structure provided with a diaphragm, an airtight chamber and a pressure equalizing tube having the same structure as that of the second structure,

A valve body provided inside the valve chamber for opening and closing the flow path of the liquid is at least located inside the high temperature regenerator by an electromagnetic valve driven by a plunger moving inside the guide cylinder by the magnetic force of the electromagnetic coil. By opening and closing the flow path for flowing the intermediate concentration absorption liquid into the absorber, and by opening and closing the flow path for flowing the refrigerant liquid inside the evaporator into the absorber by the separate solenoid valve. In an absorption refrigerator that switches between heating operation and cooling operation,
Each solenoid valve above

Airtight chamber forming means for forming an airtight chamber by the guide cylinder and the diaphragm by providing a diaphragm that deforms with the movement between the valve chamber and the guide cylinder.

By providing a flow path for introducing the refrigerant vapor whose pressure is in equilibrium with the absorbing liquid or the refrigerant liquid to the airtight chamber, the airtight chamber and the valve chamber are pressure-equalized. A fourth configuration for providing a pressure equalizing means for

An electromagnetic valve is provided in the valve chamber, which opens and closes a fluid passage, and is driven by a plunger moving inside the guide cylinder by the magnetic force of the electromagnetic coil.
At least, in the absorption refrigerator that opens and closes the flow path for flowing the refrigerant liquid inside the evaporator into the absorber, the solenoid valve described above,

An airtight chamber forming means for forming an airtight chamber by the guide cylinder and the diaphragm by providing a diaphragm that deforms with the movement, between the valve chamber and the guide cylinder.

A pressure equalizing means for equalizing the pressures of the airtight chamber and the valve chamber by providing a flow path for introducing the refrigerant vapor in equilibrium with the refrigerant liquid to the airtight chamber is provided. With the fifth configuration, the above problems can be solved.

[0042]

[Function] Since the liquid containing the absorbent in the valve chamber is blocked by the diaphragm and does not flow into the guide cylinder, contaminants such as absorbent crystals, corrosion products, iron powder and welding sludge enter the guide cylinder. It is possible to prevent these contaminants from interfering with the movement of the plunger and causing a failure, and to prevent the liquid in the valve chamber and the gas whose pressure is in equilibrium from being formed by the guide cylinder and the diaphragm. Since the valve chamber and the airtight chamber are pressure-equalized by introducing them into the airtight chamber, the magnetic force for moving the plunger and the spring and the diaphragm can be made relatively weak, so that the solenoid valve can be made compact. It acts to be configurable.

Further, in the absorption refrigerator using such an electromagnetic valve, it is possible to prevent an accident in which the absorption liquid circulation is abnormal due to the failure of the electromagnetic valve and the entire apparatus of the absorption refrigerator is damaged. This works so that the solenoid valve portion can be made compact.

[0044]

EXAMPLES Examples will be described below with reference to FIGS.
In these figures, the portions denoted by the same reference numerals as those in FIGS. 6 and 7 are portions having the same functions as the portions denoted by the same reference numerals described in FIGS. 6 and 7.

[First Embodiment] First, as a first embodiment,
An embodiment of the solenoid valve 200 will be described with reference to FIG. In FIG. 1, the diaphragm 80 is formed by forming a resin material into a bellows shape so that the diaphragm 80 can be deformed along with the movement of the plunger 55. For example, the fixed side 80A is fixed to the pressing plate 80B.
And an appropriate screw (not shown) for airtightly fixing to the inner wall of the valve chamber 64, and the movable side 80C to the pressing plate 80D.
It is arranged so as to partition between the valve chamber 64 and the guide cylinder 56 by, for example, fixing it to the back side of the valve body 61 in an airtight manner by an appropriate screw (not shown).
The airtight chamber 81 is constituted by the guide cylinder 56 and the guide cylinder 56.

The pressure equalizing conduit 83 is hermetically connected to the open end side of the guide cylinder 56 by welding or the like,
A flow path for guiding the gas 75 whose pressure is in equilibrium with the liquid 70 in the valve chamber 64 to the airtight chamber 81 is formed.
By supplying this gas to the airtight chamber 81, the valve chamber 64
The pressure inside and the pressure inside the airtight chamber 81 are equalized.

Therefore, the pressure applied to the diaphragm 80 is hardly applied when the valve body 61 is in the valve closed state, and only a very small pressure is applied when the valve body 61 is in the valve opened state, so that the diaphragm 80 is relatively weak. Since it can be formed of a film material, the resistance force against the movement of the plunger 55 is reduced, and the electromagnetic coil 5 for moving the plunger 55 is reduced.
Even if the magnetic force of 2 and the spring 54 are relatively weak, the opening / closing operation of the valve body 61 can be sufficiently performed.

Further, since the liquid 80 does not enter the airtight chamber 81 due to the diaphragm 80, impurities contained in the liquid 70, for example, impurities crystals, corrosion products, iron powder, welding sludge, etc. It becomes possible to prevent a trouble that enters the guide cylinder 56 and hinders the movement of the plunger 55.

To summarize the configuration of the first embodiment, a valve body 61 for opening and closing the flow passage 71 of the liquid 70 provided inside the valve chamber 64, that is, the flow passage 71 communicating from the inflow port 63 to the outflow port 65 is provided. , The guide cylinder 56 by the magnetic force of the electromagnetic coil 52
In the solenoid valve 200 that is driven by the plunger 55 that moves inside the

An airtight chamber which forms an airtight chamber 81 by the guide cylinder 56 and the diaphragm 80 is provided between the valve chamber 64 and the guide cylinder 56 by providing the diaphragm 80 which deforms with the movement. Forming means,

By providing a flow path for introducing the gas 75 whose pressure is in equilibrium with the liquid 70 to the airtight chamber 81, for example, a pressure equalizing conduit 83, the airtight chamber 81 and the valve chamber are provided. And a pressure equalizing means for equalizing 64
This is what constitutes the configuration of.

[Second Embodiment] Next, as a second embodiment,
An embodiment of the absorption refrigerator 100 using the solenoid valve 200 according to the first embodiment will be described with reference to FIG. In FIG. 2, the portions denoted by the same reference numerals as those in FIG. 1 have the same functions as the portions denoted by the same reference numerals in FIG. 1, and the solenoid valve 200 of the first embodiment is provided with the on-off valve V1 and the on-off valve. It is used at the location of V2.

The solenoid valve 200 used as the opening / closing valve V1 is the intermediate liquid 2 in the separation tank 5C of the high temperature regenerator 5.
b, that is, the flow path 71 is used as a flow path for flowing the intermediate concentration of the absorption liquid and the refrigerant vapor 7a into the absorber 1, and this flow path 71 is opened and closed by the valve body 61, and the pressure of the intermediate liquid 2b is reduced. The refrigerant vapor 7a in the equilibrium state is connected to the pressure equalizing pipe line 8
3 is assembled so as to be guided into the airtight chamber 81.

In the electromagnetic valve 200 used as the opening / closing valve V2, a passage 71 for flowing the refrigerant liquid 8b inside the evaporator 20 into the absorber 1 is used as the passage 71.
1 is opened and closed by the valve body 61, and the refrigerant vapor 7c whose pressure is in equilibrium with the refrigerant liquid 8b is supplied to the pressure equalizing conduit 83.
It is assembled so as to be guided into the airtight chamber 81.

Further, the solenoid valve 200 used as the opening / closing valve V3 bypasses the flow path for flowing into the absorber 1 from the heat exchanger 3 through the spray pipe 1A, and directly causes the concentrated liquid to flow. Two
The flow path 71 in which d flows into the absorber 1 is used as the flow path 71, and this flow path 71 is opened and closed by the valve body 61, and the refrigerant vapor 7c whose pressure is in equilibrium with the concentrated liquid 2d is equalized with the pressure equalization line 8.
3 is assembled so as to be guided into the airtight chamber 81.

The electromagnetic valve 200 used as the opening / closing valve V4 is a bypass for a part of the flow passage 15B for flowing the refrigerant liquid 8a inside the condenser 15 into the evaporator 20 on the condenser 15 side. The flow passage 71 is used as a flow passage 71, and the flow passage 71 is opened and closed by the valve body 61, and the refrigerant vapor 7b whose pressure is in equilibrium with the refrigerant liquid 8a is guided into the airtight chamber 81 by the pressure equalizing pipe 83. It is assembled into.

The flow passage 15B is connected to a location about the middle of the liquid level of the refrigerant liquid 8a stored inside the condenser 15, and the flow passage of the on-off valve V4 is connected to the refrigerant liquid 8a. It is connected to the bottom side of the reservoir.

At the time of the cooling operation, at least the refrigerant liquid 8a below the flow path 15B is always stored,
In order to prevent the absorbent contained in the dilute liquid 2a inside the absorber 1 from crystallizing due to residual heat and causing a failure during heating operation or shutdown, the on-off valve V4 is opened and left. The refrigerant liquid 8a present, that is, almost the entire amount of water is caused to flow into the evaporator 20, and is mixed and diluted with the rare liquid 2a of the absorber 1 via the on-off valve V2.

Therefore, in the portion of the solenoid valve 200 used as the opening / closing valve V1, the intermediate liquid 2b which enters the valve chamber 64.
And the refrigerant vapor 7a given to the airtight chamber 81 from the pressure equalizing pipe 83
The pressures of and are in an equilibrium state, and in the portion of the solenoid valve 200 used as the on-off valve V2, the refrigerant liquid 8b entering the valve chamber 64 and the refrigerant vapor given to the airtight chamber 81 from the pressure equalizing pipe 83. 7c is in a state of equilibrium with the pressure, and in the portion of the solenoid valve 200 used as the opening / closing valve V3, the concentrated liquid 2d entering the valve chamber 64 and the refrigerant given to the airtight chamber 81 from the pressure equalizing conduit 83. The pressure of the steam 7c is in an equilibrium state, and at the portion of the solenoid valve 200 used as the opening / closing valve V4, the refrigerant liquid 8a entering the valve chamber 64 and the pressure equalizing pipe 83 are applied to the airtight chamber 81. This means that the pressure with the refrigerant vapor 7b is in equilibrium.

That is, in any of the solenoid valves 200 used as the opening / closing valves V1, V2, V3, and V4, the diaphragm 80 is formed of a relatively weak film material, as in the case of the first embodiment. Therefore, the resistance force to the movement of the plunger 55 becomes small, and the magnetic force by the electromagnetic coil 52 and the spring 54 for moving the plunger 55 are reduced.
Even if and are relatively weak, the opening / closing operation of the valve body 61 can be sufficiently performed.

In any case, since the diaphragm 80 prevents the intermediate liquid 2b from entering the airtight chamber 81,
Depending on the impurities contained in the intermediate liquid 2b, the plunger 55
It becomes possible to prevent a failure that hinders the movement of the. To summarize the configuration of the second embodiment,

Liquid 7 that forms a liquid surface that moves up and down freely
0, for example, an intermediate liquid 2b, a refrigerant liquid 8a, a refrigerant liquid 8b, etc., which are housed inside, for example, the high temperature regenerator 5, the condenser 15, the evaporator 20, etc. are connected by piping and provided inside the valve chamber 64. A valve body 61 for opening and closing the flow path 71 of the liquid 70
And the plunger 55 that moves inside the guide cylinder 56 by the magnetic force of the electromagnetic coil 52 to drive the valve body 61.
In the solenoid valve 200 including

A diaphragm 80, which is provided between the valve chamber 64 and the guide cylinder 56 and is deformed by the movement,
An airtight chamber 81 formed by the guide cylinder 56 and the diaphragm 80, and a gas portion above the liquid surface, for example, the intermediate liquid 2b, the refrigerant liquid 8a, the refrigerant liquid 8b, that is, the refrigerant vapor. A second configuration in which a pressure equalizing pipe 83 connected between the portions 7a, 7b, 7c and the airtight chamber 81 is provided;

Liquid 7 that forms a liquid surface that moves up and down freely
0, for example, the regenerator of the absorption refrigerator 100 containing the intermediate liquid 2b, the refrigerant liquid 8a, the refrigerant liquid 8b, the dilute liquid 2a, that is, the high temperature regenerator 5, the condenser 15, the evaporator 15, the absorber 1 A valve body 61 which is connected to a device such as a pipe and which opens and closes the flow path of the liquid 70 provided inside the valve chamber 64, and the valve body which moves inside the guide cylinder 56 by the magnetic force of the electromagnetic coil 52. In the solenoid valve 200 including the plunger 55 that drives 61,

A third structure in which a diaphragm 80, an airtight chamber 81 and a pressure equalizing tube 83 having the same structure as those of the second structure are provided.

The flow path 7 for the liquid 70 provided inside the valve chamber 64
The electromagnetic valve 200 that drives the valve body 61 that opens and closes 1 by the plunger 55 that moves in the guide cylinder 56 by the magnetic force of the electromagnetic coil 52 causes at least the intermediate concentration of the absorbing liquid 2b in the high temperature regenerator 5. Refrigerant vapor 7
a and a flow path for flowing into the absorber 1 are opened / closed, and a separate electromagnetic valve 200 opens / closes a flow path for flowing the refrigerant liquid 8a inside the evaporator 15 into the absorber 1. As a result, in the absorption chiller 100 that switches between heating operation and cooling operation, each of the solenoid valves 200
But,

By providing the diaphragm 80 which deforms with the above movement between the valve chamber 64 and the guide cylinder 56, an airtight chamber 81 is formed by the guide cylinder 56 and the diaphragm 80. Airtight chamber forming means,

The above absorbing liquid 2b or the above refrigerant liquid 8a
A flow path for guiding the refrigerant vapors 7a and 7c whose pressures are in equilibrium to the airtight chamber 81, for example, a pressure equalizing conduit 8
A fourth configuration in which pressure equalizing means for equalizing the pressure in the airtight chamber 81 and the valve chamber 64 by providing 3 is provided,

The flow path 7 for the fluid 70 provided inside the valve chamber 64.
Using the solenoid valve 200 in which the valve body 61 that opens and closes 1 is driven by the plunger 55 that moves inside the guide cylinder 56 by the magnetic force of the electromagnetic coil 52, at least the refrigerant liquid 8b inside the evaporator 20 is absorbed. In the absorption refrigerator 200 that opens and closes the flow path for flowing into 1, the solenoid valve 200 is

An airtight chamber is formed between the valve chamber 64 and the guide cylinder 56 to form an airtight chamber 81 formed by the guide cylinder 56 and the diaphragm 80 by providing a diaphragm 80 that deforms with the movement. Forming means,

A passage for guiding the refrigerant vapor 7c in equilibrium with the refrigerant liquid 8b to the airtight chamber 81, for example, a pressure equalizing conduit 83, is provided to provide the airtight chamber 8 described above.
1 and the pressure equalizing means for equalizing the pressure in the valve chamber 64.

[Modified Implementation] The present invention includes the following modified implementation.

(1) As shown in FIG. 3, the mounting structure of the diaphragm 80 is such that the fixed side 80A is attached to the open end portion 56 of the guide cylinder 56.
It is fixed to A by a tightening band 80E or the like, and the movable side 80C is fixed to the connecting rod 55A of the plunger 55 and the valve body 61 by a tightening band 80F or the like.

(2) Without making the shape of the diaphragm 80 into a bellows shape,
An appropriate curved surface is formed.

(3) The diaphragm 80 is formed of an expandable and contractible tubular body formed of a thin metal, such as a bellows, and is attached to a required place by brazing or the like.

(4) Airtight chamber 81 by means of pressure equalizing conduit 83
As shown in FIG. 4, the location where the gas 75 is introduced is modified so that it is introduced to the inside of the diaphragm 80.

(5) The airtight chamber 81 is formed by the pressure equalizing conduit 83.
As shown in FIG. 5, the location where the gas 75 is introduced is modified so that it is introduced into the chamber portion on the spring 54 side of the guide cylinder 56.

(6) The above-mentioned second structure is applied to the absorption refrigerator having the high temperature regenerator 5 in which the heating tank 5A and the separation tank 5C are integrated.

[0079]

According to the present invention, as described above, the first
According to the solenoid valve having the above configuration, the second configuration, and the third configuration,
Since the diaphragm prevents liquid from entering the guide cylinder,
It is possible to prevent a failure that impedes the movement of the plunger due to impurities contained in the liquid, and also to guide the gas whose pressure is in equilibrium with the liquid in the valve chamber into the airtight chamber on the guide cylinder side to prevent the valve chamber from moving. Since the airtight chamber is pressure-equalized, the magnetic force for moving the plunger, the spring and the diaphragm can be made relatively weak, so that the solenoid valve can be provided in a small size and at low cost. is there.

Further, according to the absorption type refrigerator having the fourth structure and the fifth structure, due to the features of the solenoid valve described above, the circulation of the absorbing liquid or the refrigerant liquid is made abnormal due to the failure of the electromagnetic valve, and the absorption type refrigerator is used. It is possible to prevent accidents that would damage the entire refrigerator device, and to provide an inexpensive absorption refrigerator with a small solenoid valve.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, FIGS. 1 to 5 show an embodiment of the present invention, and FIG.
-Fig. 7 shows a conventional technique, and the contents of each diagram are as follows.

FIG. 1 is a longitudinal sectional view of a main part configuration.

[FIG. 2] Overall block configuration diagram

FIG. 3 is a vertical cross-sectional view of the main configuration

FIG. 4 is a longitudinal sectional view of a main part configuration.

FIG. 5 is a longitudinal sectional view of a main part configuration.

FIG. 6 is a vertical cross-sectional view of the main configuration

FIG. 7 is an overall block configuration diagram.

[Explanation of symbols]

 1 Absorber 1A Spraying pipe 1B Cooling pipe 2a Dilute 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 Radiating pipe 15 Condenser 15A Cooling pipe 20 Evaporator 20A Dispersing pipe 20B Heat exchange pipe 31a Cooling water 32a Cold / warm water 32b Cold / hot water 50 Drive mechanism part 51 Cover 52 Electromagnetic coil 53 conductor wire 54 spring 55 plunger 55A connecting rod 56 guide cylinder 58 gap 60 valve mechanism part 61 valve body 62 valve seat 63 inflow inlet 64 valve chamber 65 outflow outlet 70 liquid 71 flow passage 75 gas 80 diaphragm 80A fixed side 80B push plate 80C movable Side 80D Push plate 80E Tightening band 80F Tightening band 81 Airtight chamber 83 Equal pressure Conduit 100 the absorption chiller 200 solenoid valves P1 Pump P2 Pump V1-off valve V2 off valve V3 off valve V4 off valve

Claims (5)

[Claims] 1. A solenoid valve in which a valve body provided inside a valve chamber for opening and closing a flow path of a liquid is driven by a plunger moving inside a guide cylinder by a magnetic force of an electromagnetic coil. By providing a diaphragm that deforms with the movement between the guide cylinder and the guide cylinder, an airtight chamber forming means that forms an airtight chamber by the guide cylinder and the diaphragm, and the liquid and the pressure are in equilibrium. An electromagnetic valve, comprising: a pressure equalizing means for equalizing the pressure of the airtight chamber and the valve chamber by providing a flow path for guiding gas to the airtight chamber. 2. A valve body, which is pipe-connected to a device having a liquid in which a liquid surface that moves freely up and down is formed, and which opens and closes a flow path of the liquid provided inside a valve chamber, and an electromagnetic coil. A solenoid valve provided with a plunger that moves inside a guide cylinder by magnetic force to drive the valve body, the diaphragm being provided between the valve chamber and the guide cylinder, the diaphragm deforming with the movement. An electromagnetic valve comprising: an airtight chamber formed by the guide cylinder and the diaphragm; and a pressure equalizing pipe connected between the gas portion above the liquid surface and the airtight chamber. 3. A pipe connected to a device such as a regenerator, a condenser, an evaporator, and an absorber of an absorption refrigerator storing a liquid in which a liquid surface that moves freely up and down is provided and provided inside a valve chamber. An electromagnetic valve comprising: a valve body that opens and closes the flow path of the liquid; and a plunger that moves inside the guide cylinder by the magnetic force of an electromagnetic coil to drive the valve body, the valve chamber and the guide cylinder. And a gas-tight chamber formed by the guide cylinder and the diaphragm, a gas-phase portion of the liquid above the liquid level and the gas-tight chamber. A solenoid valve having a pressure equalizing pipe connected in between. 4. A solenoid valve in which a valve body provided inside the valve chamber for opening and closing a liquid flow path is driven by a plunger moving inside the guide cylinder by the magnetic force of an electromagnetic coil,
At least, for opening and closing the flow path for flowing the intermediate concentration absorption liquid inside the high temperature regenerator into the absorber, and for flowing the refrigerant liquid inside the evaporator into the absorber by the separate solenoid valve. An absorption refrigerator that switches between heating operation and cooling operation by opening and closing a flow path, wherein each of the solenoid valves is deformed along with the movement between the valve chamber and the guide cylinder. By providing the diaphragm, an airtight chamber forming means for forming an airtight chamber by the guide cylinder and the diaphragm, and a refrigerant vapor whose pressure is in equilibrium with the absorbing liquid or the refrigerant liquid is guided to the airtight chamber. An absorption refrigerator having a pressure equalizing means for equalizing the pressure in the airtight chamber and the valve chamber by providing a flow path for the above. 5. A solenoid valve in which a valve body provided inside a valve chamber for opening and closing a flow path of a liquid is driven by a plunger that moves inside a guide cylinder by the magnetic force of an electromagnetic coil is used at least in an evaporator. An absorption refrigerator that opens and closes a flow path for flowing a refrigerant liquid inside into an absorber,
An airtight chamber forming means for forming an airtight chamber by the guide cylinder and the diaphragm by providing a diaphragm that deforms with the movement between the valve chamber and the guide cylinder by the solenoid valve, A pressure equalizing means for equalizing the pressure of the airtight chamber and the valve chamber by providing a flow path for guiding the refrigerant vapor in equilibrium with the refrigerant liquid to the airtight chamber. Absorption refrigerator.