JP2003172498A - Liquefied gas supplying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquefied gas supplying device which prevents the reliquefaction of the liquefied gas in vapor phase in a gas conduit by keeping the gas conduit warm, while preventing the rise of temperature and pressure in a vessel when the pressure in the vessel reaches a predetermined pressure or more, and simplifies constitution. <P>SOLUTION: This liquefied gas supplying device comprises the vessel 3, a liquefied gas heating means 11 for heating the vessel 3, a heat medium heating means 15 for heating a heat medium flowing in a conduit formed on the liquefied gas heating means 11, a heat medium conduit 17a for guiding the heat medium from the heat medium heating means 16 into the heat medium conduit 17a, a cylindrical body 95 covering a part where the gas conduit 7a communicated to a vapor phase part 5 in the vessel 3 and the heat medium conduit 17a are close to each other, and closed at its both ends, and a pressure detecting means 9 for detecting the pressure of the liquefied gas in vapor phase flowing in the vessel 3 or the gas conduit 7. A control part 19 stops the heating of the heat medium by the heat medium heating means 15 when the pressure detected by the pressure detecting means 9 becomes more than a set pressure, and only the circulation of the heat medium by a pump is performed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas supply device, and more particularly to a liquefied gas supply device for supplying a liquefied gas in a vapor phase.

[0002]

2. Description of the Related Art Conventionally, as equipment for supplying liquefied gas,
A facility utilizing natural vaporization is used, which is provided with a container for containing a liquefied gas and a gas pipeline communicating with a gas phase portion in the container. The liquid phase liquefied gas contained in a container installed outdoors or indoors is vaporized by heat from the outside air around the container. The vapor-phase liquefied gas in the container is supplied to a device or devices that use the vapor-phase liquefied gas via a gas pipeline communicating with the vapor-phase portion. In a facility that supplies such a liquefied gas, the liquefied gas in the liquid phase is vaporized by the heat from the outside air around the container to supply the liquefied gas in the gas phase. Because the pressure fluctuates,
It is difficult to supply a gas phase liquefied gas while maintaining a pressure equal to or higher than a predetermined pressure.

Therefore, the inventors of the present application provided a liquefied gas heating means for heating the liquefied gas in the container in which the liquefied gas is stored, and the gas phase liquefied gas flowing into the container or the gas pipeline. A liquefied gas supply device that controls heating of the liquefied gas in the container by the liquefied gas heating means according to the pressure of the container, the temperature of the container, or the heating temperature of the liquefied gas heating means is considered. In this liquefied gas supply device, the liquefied gas heating means has a flow path through which the heating medium flows, and the liquefied gas heating means is heated by the heating medium heating means via the heating medium pipe in the flow path. The heated heat medium is introduced. Further, in order to control the heating of the liquefied gas in the container by adjusting the amount of the heating medium introduced to the liquefied gas heating means, the amount of the heating medium flowing from the heating medium heating means to the liquefied gas heating means is adjusted. Adjustment means are provided.

In such a liquefied gas supply apparatus considered by the inventors of the present application, when the pressure in the container is low and the gas phase liquefied gas cannot be supplied at a predetermined pressure, the liquefied gas in the container is heated. As a result, the temperature inside the container can be increased, the vaporization amount of the liquefied gas in the liquid phase can be increased, and the pressure inside the container can be increased. Therefore, the liquefied gas in the gas phase can be supplied while maintaining a pressure equal to or higher than a predetermined pressure without being affected by conditions such as the outside air temperature. Further, it is also possible to stably supply the vapor phase liquefied gas at a relatively high pressure that cannot be stably supplied by the conventional equipment utilizing natural vaporization.

By the way, in the gas pipeline for supplying the vapor phase liquefied gas to the equipment and devices that utilize the vapor phase liquefied gas, depending on conditions such as the outside air temperature and the pressure in the gas pipeline,
The gas phase liquefied gas may be reliquefied. In particular,
The higher the supply pressure of the liquefied gas in the vapor phase, the easier it is to reliquefy. Therefore, in a liquefied gas supply device capable of increasing the supply pressure of the liquefied gas, it is necessary to consider prevention of reliquefaction. Therefore, in order to prevent the reliquefaction of the gas phase liquefied gas in the gas pipeline, the inventors of the present application bring at least a part of the heat medium pipeline and at least a part of the gas pipeline close to each other. It is considered to keep the gas pipeline warm by the heat of the heat medium flowing in the heat medium pipeline by piping and covering the portion arranged in close proximity with the cylindrical body whose both ends are closed.

At this time, when the pressure in the container reaches the required pressure, if the flow of the heat medium is stopped or the heating of the heat medium is stopped, it becomes impossible to keep the temperature of the gas pipeline.
Reliquefaction may occur in the gas pipeline. Therefore, when the pressure in the container reaches a predetermined pressure or higher, the inventors of the present application reduce the amount of heat medium introduced to the liquefied gas heating means by the heat medium amount adjusting means to reduce the heat amount for heating the container. It is considered to prevent the reliquefaction of the gas phase liquefied gas in the gas pipeline by keeping the gas pipeline warm while reducing the temperature and pressure in the container to suppress the rise in temperature and pressure.

[0007]

However, in the liquefied gas supply device as described above, since the heat medium amount adjusting means is provided, the device serving as the heat medium amount adjusting means and the device controlling the device are controlled. Since a circuit for doing so is required, the configuration of the liquefied gas supply device becomes complicated.

An object of the present invention is to keep the gas pipeline warm while suppressing an increase in the temperature and pressure in the container when the pressure in the container reaches a predetermined pressure or more, and to maintain the gas phase in the gas pipeline. Another object is to simplify the configuration of the liquefied gas supply device that prevents the reliquefaction of the liquefied gas described above.

[0009]

A liquefied gas supply apparatus of the present invention is provided with a container for containing liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and the liquefied gas heating means. The heating medium heating means for heating the heating medium flowing through the flow path, the heating medium conduit for guiding the heating medium from the heating medium heating means to the liquefied gas heating means, and the heating medium for the heating medium inside the heating medium conduit A pump for flowing the gas, a tubular body having both ends closed to cover both the gas pipeline communicating with the gas phase portion in the container and the portion of the heat medium pipeline that are arranged close to each other, and in the container or the gas pipe The control unit includes a pressure detection unit that detects the pressure of the gas phase liquefied gas that has flowed into the passage, and a control unit that controls the heating of the heat medium by the heat medium heating unit based on the pressure detected by the pressure detection unit. When the pressure detected by the pressure detection means exceeds the set pressure, the The heating of the medium is stopped, to solve the above problems by a configuration in which only the flow of the heat medium by the pump.

With this structure, the heating of the heat medium by the heat medium heating means is stopped when the pressure of the gaseous liquefied gas flowing into the container or the gas pipeline becomes equal to or higher than the set pressure. The heat medium is not heated by the heat medium heating means, and the heat input from the liquefied gas heating means to the container is only the amount of heat held by the heat medium when the heating by the heat medium heating means is stopped.
For this reason, it is possible to suppress an increase in temperature and pressure inside the container even if the heat medium amount adjusting means is not provided unlike the conventional liquefied gas supply device. On the other hand, even if the heating of the heating medium by the heating medium heating means is stopped, the heating medium continues to flow through the pump, so the heat held by the heating medium causes the liquefied gas in the gas phase in the gas pipeline. Is kept warm and can prevent reliquefaction of the gas phase liquefied gas in the gas pipeline. Therefore, when the pressure in the container reaches a predetermined pressure or higher, the gas pipeline is kept warm and the liquefied gas in the gas phase is reliquefied while keeping the temperature and pressure in the vessel from rising. The configuration of the liquefied gas supply device for preventing can be simplified.

Further, when the pressure detected by the pressure detecting means by the control section becomes equal to or higher than the first set pressure, the heating capacity of the heating medium heating means is switched to lower the temperature of the heating medium heated by the heating medium heating means. When the pressure detected by the pressure detection means becomes equal to or higher than the second set pressure which is higher than the first set pressure, the heating of the heat medium by the heat medium heating means is stopped and only the flow of the heat medium by the pump is passed. The configuration is performed.

According to this structure, the heat medium heated by the heat medium heating means is heated when the pressure of the gas phase liquefied gas flowing into the container or the gas pipeline exceeds the first set pressure. By lowering the temperature of 1, the amount of heat for heating the container by the liquefied gas heating means is reduced. When the temperature and pressure inside the container are still increased by lowering the temperature of the heating medium, the heating medium becomes higher than the second setting pressure higher than the first setting pressure when the temperature and pressure inside the container still increase. By stopping the heating of the heating medium by the heating means and only passing the heating medium through the pump,
The amount of heat for heating the container by the liquefied gas heating means is further reduced. Therefore, the frequency of stopping the heating of the heating medium by the heating medium heating unit is reduced, and when the pressure in the container reaches a predetermined pressure or higher, the temperature and pressure inside the container are suppressed and the gas pipeline is kept warm. In addition to simplifying the configuration of the liquefied gas supply device that prevents the reliquefaction of the vapor phase liquefied gas in the gas pipeline, the frequency of ignition and extinguishing of the burner can be reduced.

Further, pressure detecting means for detecting the pressure of the vaporized liquefied gas flowing into the container or the gas pipeline, temperature detecting means for detecting the temperature of the container or the heating temperature of the container by the heating means, and pressure detection A controller for controlling the operation of the heating medium heating means based on the pressure detected by the means and the temperature detected by the temperature detecting means, and the controller controls the heating medium when the pressure detected by the pressure detecting means becomes equal to or higher than a set pressure. The heating capacity of the heating means is switched to lower the temperature of the heating medium heated by the heating medium heating means, and when the temperature detected by the temperature detecting means reaches or exceeds the set temperature, the heating medium is heated by the heating medium heating means. Is stopped and only the heat medium is made to flow by the pump.

With such a structure, the temperature of the heat medium heated by the heat medium heating means when the pressure of the gas phase liquefied gas flowing into the container or the gas pipeline exceeds the set pressure. By lowering the temperature, the amount of heat for heating the container by the liquefied gas heating means can be reduced. However, by lowering the temperature of the heating medium, if the temperature or pressure inside the container still rises, the temperature of the container or the heating temperature of the container by the heating means will exceed the set temperature. In such a case, the heating of the heating medium by the heating medium heating means is stopped, and only the flow of the heating medium by the pump is carried out, whereby the amount of heat of heating of the container by the liquefied gas heating means can be further reduced. Therefore, when the pressure in the container reaches a predetermined pressure or higher, while keeping the temperature and pressure in the container from rising, the gas pipeline is kept warm to reliquefy the liquefied gas in the gas phase. In addition to simplifying the configuration of the liquefied gas supply device for preventing, the heating control for lowering the temperature of the heating medium heated by the heating medium heating means can reduce the frequency of ignition and extinguishing of the burner.

Further, in the liquefied gas supply apparatus of the present invention, when the pressure detected by the pressure detecting means becomes equal to or higher than the set pressure, the control part switches the heating capacity of the heating medium heating means and is heated by the heating medium heating means. The above problem is solved by lowering the temperature of the heating medium and setting the temperature of the lowered heating medium to 20 ° C. or higher and 35 ° C. or lower.

According to this structure, when the pressure of the vaporized liquid gas flowing into the container or the gas pipeline exceeds the set pressure, the temperature of the heat medium heated by the heat medium heating means becomes low. It becomes 20 ° C or more and 35 ° C or less. 20 heat medium
When the temperature is from 35 ° C to 35 ° C, the liquefied gas heating means can hardly raise the temperature of the container by the heat quantity of the heating medium, but the liquefied gas in the gas phase in the gas pipeline can be kept warm. . For this reason, unlike the conventional liquefied gas supply device, it does not have a heat medium amount adjusting means, but it is possible to suppress an increase in temperature and pressure in the container, and at the same time, to heat the gas held by the heat medium in the gas pipeline. Since the vaporized liquefied gas inside is kept warm, reliquefaction of the vaporized liquefied gas in the gas pipeline can be prevented. Therefore, when the pressure in the container reaches a predetermined pressure or higher, the gas pipeline is kept warm and the liquefied gas in the gas phase is reliquefied while keeping the temperature and pressure in the vessel from rising. The configuration of the liquefied gas supply device for preventing can be simplified.

Further, the liquefied gas supply device of the present invention detects the pressure of the liquefied gas in the gas phase flowing into the container or the gas pipeline, and the temperature of the liquefied gas in the gas pipeline. A gas temperature detecting means and a control part for controlling the operation of the heating medium heating means based on the pressure detected by the pressure detecting means and the temperature detected by the gas temperature detecting means are provided, and the control part detects by the pressure detecting means. When the pressure becomes equal to or higher than the set pressure, and the temperature detected by the gas temperature detecting means is equal to or lower than the first set temperature, the heat medium is heated by the heat medium heating means and the pump is driven, so that the gas temperature detecting means. The above problem is solved by adopting a configuration in which at least the driving of the pump is stopped when the temperature detected in step 2 becomes equal to or higher than the second set temperature which is higher than the first set temperature.

With such a structure, when the pressure of the vapor phase liquefied gas flowing into the container or the gas pipeline exceeds the set pressure, the vapor phase liquefied gas in the gas pipeline does not reliquefy. When the temperature is lower than the temperature, the heating medium heater and the pump are driven to allow the heated heating medium to flow therethrough to keep the gas pipeline warm. On the other hand, when the liquefied gas in the gas phase in the gas pipeline is at a temperature above the temperature at which it is not reliquefied, heating of the container by the liquefied gas heating means is stopped in order to stop the drive of the pump and stop the flow of the heat medium. Not done Here, when the pressure of the gas-phase liquefied gas flowing into the container or the gas pipeline becomes equal to or higher than the set pressure, the temperature of the gas-phase liquefied gas flowing from the container into the gas pipeline is at a level not reliquefied. The temperature is high enough. Therefore, normally, the driving of the pump is stopped and the heating of the container by the liquefied gas heating means is stopped. Then, the pump is driven to heat the container by the liquefied gas heating means only when the temperature of the gas phase liquefied gas in the gas pipeline becomes close to the temperature for reliquefaction due to the influence of the outside air temperature. Therefore, even with such a configuration, unlike the conventional liquefied gas supply device, the heat medium amount adjusting means is not provided, but it is possible to suppress an increase in the temperature and pressure in the container and the heat medium holds the heat medium. The heat of the vaporized liquefied gas in the gas pipeline is kept by the heat, so that reliquefaction of the vaporized liquefied gas in the gas pipeline can be prevented. Therefore, when the pressure in the container reaches a predetermined pressure or higher, the gas pipeline is kept warm and the liquefied gas in the gas phase is reliquefied while keeping the temperature and pressure in the vessel from rising. The configuration of the liquefied gas supply device for preventing can be simplified.

Further, when the pressure detected by the pressure detecting means becomes equal to or higher than the set pressure, the control section determines that the temperature detected by the gas temperature detecting means is equal to or lower than the first set temperature, the heating capacity of the heating medium heating means. Is switched to lower the temperature of the heat medium heated by the heat medium heating means, and when the temperature detected by the gas temperature detecting means becomes equal to or higher than the second set temperature higher than the first set temperature, at least the driving of the pump is stopped. The configuration is
With such a configuration, when the pressure in the container reaches a predetermined pressure or higher, the temperature of the container is suppressed from rising and the pressure in the container is kept warm to keep the gas pipeline warm. In addition to simplifying the structure of the liquefied gas supply device that prevents reliquefaction of the liquefied gas, when the pressure of the liquefied gas in the gas phase that has flowed into the container or gas line exceeds the set pressure, the gas line This is preferable because it is possible to further suppress the rise in the temperature and pressure of the container when it is necessary to keep the liquefied gas in the gas phase inside.

Further, in any one of the above, a temperature detecting means for detecting the temperature of the container or the heating temperature of the container by the heating means is provided, and the control section heats the heating medium when the temperature detected by the temperature detecting means exceeds a set temperature. The heating of the heat medium and the driving of the pump by the means are stopped. With such a configuration, when the temperature of the container becomes equal to or higher than a predetermined upper limit temperature set not to exceed the temperature stipulated by law, the flow of the heating medium to the liquefied gas heating means is stopped. It is preferable because the heating of the container by the liquefied gas heating means can be stopped and the temperature rise in the container can be suppressed.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of a liquefied gas supply apparatus to which the present invention is applied will be described below with reference to FIGS. 1 to 5. FIG. 1 is a diagram showing a schematic configuration and operation of a liquefied gas supply device to which the present invention is applied. FIG. 2 is a diagram showing a schematic configuration and operation of the heat source device. FIG. 3 is a block diagram showing a connection state and operation between the control unit and each device. FIG. 4 is a diagram for explaining the on / off operation of the pressure switch and the temperature switch. Figure 5
It is a flowchart which shows operation | movement of the liquefied gas supply apparatus which applies this invention. In addition, in the present embodiment, a configuration in the case of supplying a liquefied gas in a gas phase as a fuel for driving a turbine of a micro gas turbine will be described as an example. The micro gas turbine is smaller in size than the conventional reciprocating engine type generator and the like, compared to the power generation scale. Such a micro gas turbine has a high pressure, for example, 0.3-
It is necessary to maintain the pressure of 1.0 MPa and supply the liquefied gas.

The liquefied gas supply apparatus 1 of this embodiment is shown in FIG.
Liquefied gas, such as liquefied petroleum gas (LP
G), liquefied natural gas (LNG), and the like, a container 3 for storing the same, a gas pipeline 7 communicating with the gas phase part 5 in the vessel 3, and a pressure detecting means for detecting the pressure in the gas pipeline 7. Pressure switch 9, a heater 11 installed at the bottom of the container 3 to serve as a liquefied gas heating means, a temperature switch 13 serving as a temperature detection means for detecting the heating temperature of the heater 11, and a heat source device serving as a heating medium heating means. 15, a heat medium conduit 17a for circulating a heat medium, for example, water between the heater 11 and the heat source device 15, 1
7b, and a control unit 19 for controlling the operation of the liquefied gas supply device 1 and the like.

The container 3 is supported on the leg portion 21 in a state in which a substantially cylindrical container is laid sideways. Such a container 3
Is installed outdoors, and the liquefied gas in the liquid phase that is contained inside the container 3 and becomes the liquid phase portion 23 is vaporized by the heat received by the container 3 from the outside air. Therefore, the vapor phase liquefied gas is accumulated in the vapor phase portion 5 above the container 3. In addition, in FIG. 1, the container 3 is shown in cross section.
The gas pipeline 7 is installed in the gas phase portion 5 of the container 3 and is branched into two gas pipelines 7a and 7b in the middle. Of the branched gas pipelines 7 a and 7 b, the gas pipeline 7 a is connected to a combustor (not shown) of the micro gas turbine 25, and the gas pipeline 7 b is connected to a burner of the heat source device 15.

In the portion of the gas pipeline 7 before branching into the gas pipelines 7a, 7b, from the upstream side of the flow of the liquefied gas in the gas pipeline 7, the pressure switch 9 and the liquefied gas in the gas phase are introduced. The 1st pressure regulator 27 which adjusts the supply pressure to the micro gas turbine 25 is provided one by one. A shutoff valve 29, which is an electromagnetic valve for shutting off the flow of the vaporized liquefied gas to the gas pipeline 7a, is provided in the vicinity of the branched portion of the gas pipeline 7a. A close valve 31 for manually stopping the supply of the liquefied gas in the gas phase to the micro gas turbine 25 is provided near the micro gas turbine 25 in the gas pipeline 7 a.

The pressure switch 9 switches between transmitting and stopping a signal at two preset pressures, and the pressure switch 9 and the shutoff valve 29 are electrically connected to the control unit 19 via the wiring 33. ing. On the other hand, a second pressure adjuster 35 that adjusts the supply pressure of the vapor phase liquefied gas to the heat source device 15 is provided near the branched portion of the gas pipeline 7b. The pressure switch 9, the first pressure regulator 27, the shutoff valve 29, the second pressure regulator 35, and the like are placed in a case 37 installed on the container 3 together with a part of the gas pipelines 7, 7a, and 7b. It is housed. However, case 3
It is also possible to adopt a configuration in which 7 is not provided.

The heater 11 has, for example, a heat exchange pipe 39 formed of a material having high heat conductivity such as copper bent in a bellows shape in a metal case. The space between the case and the case is filled with a heat transfer medium such as water or a heat transferable material such as silicon. Such a heater 11 is attached in close contact with the bottom surface of the container 3.
The temperature switch 13 is installed so as to detect the temperature of the filling material of the heater 11, that is, the temperature of the heat transferred to the container 3. The temperature switch 13 switches between signal transmission and signal stop at two preset temperatures, and is electrically connected to the control unit 19 via the wiring 33.

As shown in FIG. 2, the heat source device 15 includes a combustion chamber 41 for heating the heat medium, a heat exchange pipe 43 installed in the combustion chamber 41 for allowing the heat medium to flow therethrough, and a heat medium for the heat exchange pipe 43. The heat medium pipe 45a for guiding the heat source, the heat medium pipe 45b for causing the heat medium to flow out from the heat exchange pipe 43, and the heat medium pipe 45a for the heat source provided sequentially from the upstream side of the flow of the heat medium. Tank 4
7, pump 49, and heat source machine control means 5 for controlling the operation of the pump 49 and the burner 51 provided in the combustion chamber 41
3 and so on. In addition to the burner 51, the combustion chamber 41 of the heat source device 15 is provided below the burner 51, and a combustion fan 55 for supplying combustion air into the combustion chamber 41,
Combustion detector 57 and spark plug 59 provided above burner 51, frame rod 57 and spark plug 59
And an exhaust passage 61 provided above the heat exchange pipe 43 electrically connected to an igniter 59 provided above.

The burner 51 is equipped with a capacity switching solenoid valve 63 for switching the gas amount in order to switch the combustion capacity of the burner 51. The burner 51 is connected to a heat source in-machine gas pipeline 65 connected to the gas pipeline 7b. In the heat source internal gas pipeline 65, two gas solenoid valves 67, 69 for blocking the flow of gas in the heat source internal gas pipeline 65 are sequentially provided from the upstream side of the gas flow in the heat source internal gas pipeline 65. Has been. Between the gas solenoid valve 67 and the gas solenoid valve 69, a gas proportional valve 7 for adjusting the gas amount according to the combustion air amount.
1 is provided. The combustion fan 55 is provided with a rotation sensor 73 that detects the rotation speed of the fan. An igniter 74 is electrically connected to the spark plug 59. An overheat prevention device 75 for preventing overheating of the combustion chamber 41 is attached to the outer surface of the combustion chamber 41.

The heat medium conduit 45a in the heat source is connected to the heat medium conduit 17a.
The heat medium pipe 45b in the heat source unit is connected to the heat medium pipe 17b. The heat medium tank 47 provided in the heat source internal heat medium pipe 45a is provided with a heat medium replenishing pipe 77 for replenishing the heat medium having a heat medium replenishing solenoid valve 76 for controlling the flow of the heat medium. It is connected. The heating medium supply pipe 77 is provided with a heater 79 for preventing the heating medium supply pipe 77 from freezing. Further, the heat medium supply pipe 77 is provided with a heat medium removing plug portion 81 for discharging the heat medium in the heat medium supply pipe 77. The heat medium tank 47 is provided with an overflow port 83 for overflowing the heat medium in the heat medium tank 47, a liquid level sensor 85 for detecting the liquid level of the heat medium in the heat medium tank 47, and the like. There is. A low temperature thermistor 87 for detecting the temperature of the heat medium returned from the heater 11 via the heat medium conduit 17b is provided in the upstream side of the heat medium tank 47 of the heat source internal heat medium conduit 45a. Is attached.

At the outlet portion of the heat medium from the heat exchange pipe 43 of the heat medium pipe 45b inside the heat source, an air heating safety device 89 for preventing the heat exchange pipe 43 from being heated, and the heat medium pipe 17a.
A high temperature thermistor 91 for detecting the temperature of the heat medium directed to the heater 11 via the heater is sequentially mounted from the upstream side of the flow of the heat medium. In addition, the heat source internal heat medium conduit 45b is connected to the heat medium internal conduit 45a at the connection portion with the heat medium internal conduit 17a.
Heat medium removal plug portion 93 for discharging the heat medium in a and 45b
Is provided.

The heat source machine control means 53 includes a pump 49, a combustion fan 55, a capacity switching solenoid valve 63 and two gas solenoid valves 6.
7, 69, rotation sensor 73, igniter 74, overheat prevention device 75, heat medium replenishing solenoid valve 76, heater 79, liquid level sensor 85, low temperature thermistor 87, dry heating safety device 89,
Then, it is electrically connected to the high temperature thermistor 91 and the like by wiring not shown. Further, as shown in FIG. 3, the heat source device control means 53 includes a combustion control unit controller 93,
A combustion detection unit 95, a combustion temperature detection unit 97, and a combustion circuit 9 electrically connected to the combustion control unit controller 93
9, a pump drive circuit 101 and the like are included. The combustion detection unit 95 includes a flame temperature detection unit 9 on the flame rod 57.
7 is a temperature sensor (not shown) provided in the burner 51, the combustion circuit 99 is the combustion fan 55, the capacity switching electromagnetic valve 63, the two gas electromagnetic valves 67 and 69, and the pump drive circuit 101 is the pump 49. Are electrically connected to each.

Further, the heat source device 15 having the configuration of this embodiment
As shown in FIG. 1, for example, a household power source 1 of 100V
And a remote controller 105 electrically connected to the heat source machine control means 53. The heat source device 15 of the present embodiment is one in which the above-described constituent members and devices are integrally housed,
A commercial home water heater or hot water heater software is modified so that the operations of the burner 51 and the pump 49 can be controlled separately. However, the heat medium heating means is not limited to the heat source device 15 obtained by modifying the commercially available one as in the present embodiment, and any device having the components and devices included in the heat source device 15 may be appropriately formed. Further, it is not necessary that the constituent members and devices are integrally housed in a housing, and for example, a pump 49 for circulating a heat medium and a burner 51 related to combustion are separately provided. The configuration provided may be adopted.

As shown in FIG. 1, one end of the heat medium pipe 17a is connected to the heat medium heat pipe 45a of the heat source device 15, and the other end is connected to the heat exchange pipe 39 of the heater 11. The heat medium heated by the heat source device 15 flows through the heat medium conduit 17a. The heat medium conduit 17b has one end connected to the heat exchange conduit 39 of the heater 11 and the other end connected to the heat source internal heat carrier conduit 45b of the heat source device 15, and the heat medium conduit 17b includes a heater. The heat medium that has released heat at 11 is passed through.

A portion of the gas pipe 7a, which is located upstream of the shutoff valve 31 and outside the case 37, that is, the shutoff valve 2
A part of the portion on the downstream side of 9 is arranged so as to be close to the heat medium conduit 17a and to be along the heat medium conduit 17a,
The portions of the gas pipeline 7a and the heat medium pipeline 17a, which are arranged in close proximity to each other, are both surrounded by a cylindrical body 95 whose both ends are closed. The gas pipe 7a and the heat medium pipe 17a in the cylindrical body 95 are arranged at intervals so as not to come into contact with each other. In other words, the gas pipeline 7a and the heat medium pipeline 17a in the tubular body 95 are in a state of being inserted in parallel in the tubular body 95 containing air at a predetermined interval. The cylindrical body 95 is
It is made of a heat insulating material. In addition, the heat medium conduit 17a
In order to keep the temperature constant and prevent reliquefaction of the liquefied gas in the gas phase, it is preferable that the portions of the gas pipe 7a and the heat medium pipe 17a covered by the cylinder 95 are as large as possible.

As shown in FIGS. 1 and 3, the controller 19 controls the pressure switch 9 and the temperature switch 1 via the wiring 33.
3. In addition to being electrically connected to the combustion control unit controller 93 of the heat source unit control means 53 of the heat source unit 15, it is also electrically connected to the control unit (not shown) of the micro gas turbine 25 via the wiring 33. ing. Such a control unit 19 is a circuit (not shown) that issues a control command for the combustion state of the burner 51 of the heat source device 15 according to the pressure detected by the pressure switch 9, and the heat source device according to the temperature detected by the temperature switch 13. A circuit (not shown) for performing the start / stop of the pump 49 of 15 and a control command for the combustion state of the burner 51, a circuit (not shown) for opening and closing the shutoff valve 31 in accordance with the operation and stop of the micro gas turbine 27, etc. Contains.

The operation of the liquefied gas supply device having such a configuration and the characteristic part of the present invention will be described. In the figure, the solid arrow indicates the flow of the liquefied gas, and the broken arrow indicates the flow of the heat medium. In addition, the heat source device 15 of the present embodiment
Is a commercially available heat source machine, and the combustion state of the burner 51 is operated at high temperature by switching the supply amount of gas phase liquefied gas as fuel to the burner 51 by switching the capacity switching solenoid valve 63 or the like. And the low-temperature operation are switched to two stages, and the temperature of the heated heat medium is set to, for example, 60 during high-temperature operation.
The temperature can be controlled in two steps, such as ℃ and 50 ℃ during low temperature operation. However, in the present embodiment, the heat source device 15 is controlled to perform only the high temperature operation of heating the temperature of the heat medium to the higher temperature, for example, 60 ° C.

Further, in this embodiment, the pressure switch 9
As shown in FIG. 4, of the set two-stage pressures, the set pressure P1 that is lower and lower, for example, 0.1.
When the pressure reaches 55 MPa, the switch is turned on and an electric signal is transmitted, the pressure rises and the higher set pressure P2, for example, 0.
The switch is turned off at 7 MPa to stop the transmission of electric signals. The temperature switch 13 is
Of the two set temperatures, the temperature drops and the lower set temperature T1, for example, when the temperature reaches 35 ° C., the switch is turned on to send an electric signal, and the temperature rises and the higher set temperature T2, For example, when the temperature reaches 40 ° C., the switch is turned off to stop the transmission of electric signals.

When the operation switch (not shown) electrically connected to the control unit 19 is turned on, the control unit 19 controls the temperature of the filling material (not shown) in the heater 11 as shown in FIG. That is, depending on the heating temperature of the container 3 by the heater 11, it is determined whether or not to stop the heat source device 15 (step 2
01). At the start of the operation, in step 201, if the heating temperature of the container 3 by the heater 11 is higher than the lower set temperature T1, the temperature switch 13 is in the off state and does not emit an electric signal. Therefore, the control unit 19 does not issue a drive command to the heat source device 15, and the heat source device 15 remains in the state where the combustion of the burner 51 and the pump 49 are stopped, and the flow and heating of the heat medium are stopped. (Step 202).

On the other hand, in step 201, the heater 1
When the temperature of the filling material (not shown) in 1 falls below the lower set temperature T1, the temperature switch 13 is turned on and an electric signal is transmitted. At this time, the control unit 19 determines the driving state of the heat source device 15 according to the pressure inside the container 3, that is, the pressure at the outlet of the gas pipeline 7 from the container 3 (step 203). In step 203, if the pressure at the outlet of the gas pipeline 7 from the container 3 is less than or equal to the lower set pressure P1, the pressure sensor 9 turns on and sends an electric signal. The burner 51, the pump 49, etc. of 15 are driven to heat the heating medium by high temperature operation and to flow the heating medium (step 204).

As described above, the heat medium heated to a higher temperature, for example, 60 ° C. by the high temperature operation of the heat source device 15,
As shown in FIG. 1, the heat medium pipe 17a flows through the heat source unit 1
Liquid is sent from 5 to the heater 11. Then, the container 3 and the liquefied gas in the container 3 are heated by the heat of the heat medium heated by the heat source device 15 through the filling in the heater 11, and the liquefied gas in the liquid phase is vaporized. And the saturated vapor pressure of the liquefied gas increases, the pressure in the container 3 increases.

As the pressure inside the container 3 rises due to the heating of the container 3 by the heater 11, etc., as shown in FIG.
When the pressure at the outlet of the gas pipe 7 from the container 3 becomes equal to or higher than the higher set pressure P2, the pressure sensor 9 is turned off in step 203 and the transmission of the electric signal is stopped. At this time, the control unit 19 instructs the heat source device 15 to stop the combustion of the burner 51, and the heat source device 15 stops the combustion of the burner 51 and operates only the pump 49 (step 205).

As a result, only the flow of the heat medium is performed, and the heat of the heat medium keeps the gas pipe 7a in the cylinder 95 warm and prevents reliquefaction. further,
Since the heating of the container 3 by the heater 11 is performed only by the heat amount of the heat medium when the heating of the heat medium in the heat source device 15 is stopped, the heat amount for heating the liquefied gas in the container 3 is reduced. As a result, the rise in temperature and pressure inside the container 3 is suppressed.

Since the heating of the heat medium by the heat source unit 15 is stopped, the pressure in the container 3 is lowered, and the step 2
In 03, when the pressure becomes lower than the lower set pressure P1 again, the pressure switch 9 sends an electric signal to cause the control unit 19 to instruct the heat source device 15 to burn the burner 51, and the high temperature operation of the heat source device 15 is performed. The heating of the heating medium is performed.
As a result, in step 204, the burner 51, the pump 49, and the like of the heat source device 15 are driven to heat the heat medium by high-temperature operation and flow the heat medium.

Therefore, as shown in FIG. 1, the heated heat medium flows through the heat medium pipes 17a and 17b again and circulates between the heat source device 15 and the heater 11. This increases the amount of heat that the liquefied gas in the container 3 receives,
The vaporization of the liquefied gas in the liquid phase and the increase of the saturated vapor pressure of the liquefied gas increase the pressure in the container 3. That is, container 3
The gas phase liquefied gas kept at a predetermined pressure or higher by being heated by the heater 11 according to the pressure in the container 3 is depressurized by the first pressure regulator 29 to the pressure required by the micro gas turbine 27. And is supplied to the micro gas turbine 27 via the gas pipeline 7a.

As described above, when the detected pressure becomes equal to or higher than the higher set pressure P2 in accordance with the pressure in the gas pipeline 7 detected by the pressure switch 9, the control unit 19 causes the burner 51 of the heat source unit 15 to operate. Combustion is stopped and only the pump 49 is operated to suppress the heat of heating of the liquefied gas in the container 3 by the heater 11, and when the lower set pressure P1 is reached, the combustion of the burner 51 of the heat source device 15 and the pump 49 By increasing the amount of heat for heating the liquefied gas in the container 3 by the heater 11 by performing the above operation, the pressure of the liquefied gas in the container 3 is maintained at a predetermined pressure or higher, and the inside of the container 3 or the gas pipeline 7 is Heater 1 when the internal pressure becomes higher than the higher set pressure P2
1 reduces the amount of heat supplied from the heating medium.

Here, in step 205, the pump 4
Even if the heating amount of the liquefied gas in the container 3 by the heater 11 is suppressed as the operation of 9 only, the container 3 may be heated by a slight amount of heat depending on the conditions such as the outside air temperature.
The temperature inside may keep rising. In this case, container 3
The temperature of the liquefied gas or liquefied gas may exceed the upper limit temperature specified by law, for example. Therefore, as shown in FIG. 5, the temperature switch 13 sets the temperature T2 of the higher temperature of the filling material of the heater 11 in step 201.
When it is above, it is turned off and the transmission of electric signals is stopped. Accordingly, the control unit 19 commands the combustion of the burner 51 of the heat source device 15 and the stop of the drive of the pump 49, and the heat source device 15
Stops the combustion of the burner 51 and the driving of the pump 49 to stop the flow and heating of the heat medium. Therefore, the heating of the container 3 by the heater 11 is stopped and the temperature rise of the container 3 is stopped, so that the temperature of the container 3 can be prevented from exceeding the predetermined upper limit temperature.

On the other hand, in step 201, when the heating of the container 3 is stopped and the temperature of the container 3 drops and the temperature of the container 3 becomes lower than the lower set temperature T1, the temperature switch 13 is turned on again and the electric signal is turned on. Is transmitted, and the container 3 is heated by the heater 11 according to the pressure inside the container 3.

As described above, the control unit 19 stops the heat source device 15 when the heating temperature becomes equal to or higher than the set temperature T2, which is the higher temperature, according to the heating temperature of the heater 11 with respect to the container 3 detected by the temperature switch 13. The heating of the container 3 by the heater 11 is stopped, and when the lower set temperature T1 is reached, the heat source device 15 is operated according to the pressure in the container 3 to heat the container 3 by the heater 11, The temperature inside 3 is kept below the temperature set as the upper limit, and the temperature inside the container 3 is kept below the temperature set as the lower limit.

As described above, in the liquefied gas supply apparatus 1 of the present embodiment, the pressure switch 9 raises the pressure of the vaporized liquefied gas flowing into the container 3 or the gas pipeline 7 to be higher than the set pressure P2. When it is detected that the
Because the combustion of the burner 51 of the heat source device 15 is stopped and only the pump 49 is operating, the heat medium is not heated by the heat source device 15, and the heat input from the heater 11 to the container is the heat source. Only the amount of heat held by the heat medium when the heating by the machine 15 is stopped. For this reason, the amount of heat released by the heater 11 can be reduced and rise in the temperature and pressure inside the container 3 can be suppressed even without the provision of a heat medium amount adjusting means unlike the conventional liquefied gas supply device. On the other hand, even if the heating of the heating medium in the heat source device 15 is stopped, the heating medium is still flowed by the pump 49, so that the portion of the gas pipeline 7a covered by the cylinder 95 is held by the heating medium. Gas pipe line 7
Reliquefaction of the vapor phase liquefied gas in a can be prevented. Therefore, when the pressure in the container reaches a predetermined pressure or higher, the gas pipeline is kept warm and the liquefied gas in the gas phase is reliquefied while keeping the temperature and pressure in the vessel from rising. The configuration of the liquefied gas supply device for preventing can be simplified.

Further, the liquefied gas supply device 1 of this embodiment
Then, the temperature switch 13 for detecting the heating temperature of the container 3 by the heater 11 is provided, and the control unit 19 controls the temperature switch 1
When the temperature detected in 3 becomes equal to or higher than the higher set temperature T2, the combustion of the burner 51 of the heat source device 15 and the driving of the pump 49 are stopped. Therefore, for example, when the heating temperature of the container 3 becomes equal to or higher than a predetermined upper limit temperature set so as not to exceed the temperature stipulated by law, the heating of the container 3 by the heater 11 is stopped, so that the temperature in the container 3 becomes higher than necessary. The temperature rise can be suppressed.

Further, in the liquefied gas supply apparatus 1 of this embodiment, when the pressure in the container reaches a predetermined pressure or higher, the combustion of the burner 51 of the heat source device 15 is stopped and the heating medium is heated by the heat source device 15. Since the heating is stopped, the rise of the heating temperature of the container 3 by the heater 11 is suppressed, the heating temperature of the container 3 by the heater 11 is less likely to be higher than the set temperature T2, and the flow of the heat medium is stopped. Therefore, the frequency with which the pump 49 of the heat source device 15 is stopped can be reduced. In addition, since the frequency of stopping and driving the pump 49 of the heat source device 15 can be reduced,
The service life of the pump can be improved and the frequency of pump replacement and maintenance inspection can be reduced.

By the way, depending on the conditions such as the outside air temperature, the amount of heat is not sufficiently reduced, and even if the pressure inside the container 3 reaches a predetermined pressure or more, the heat input from the heater 11 to the container 3 continues. Due to the consumption of gas phase liquefied gas,
Alternatively, when the pressure is relatively small, the pressure in the container 3 may increase more than necessary. Container 3 like this
When the pressure in the container rises more than necessary, for example, when the container 3 is filled with liquefied gas from a lorry or the like, the pressure in the container 3 becomes higher than the pressure of the lorry, and the pressure in the container 3 and the pressure of the lorry are equalized. Filling can be performed only after pressure is applied, and the liquefied gas in the container 3 flows into the lorry side,
In some cases, there may be inconveniences such as a long filling time and an inability to know the filling amount of the liquefied gas in the container 3. Thus, it is not desirable that the pressure in the container 3 rises more than necessary due to the heat input to the container 3.

On the other hand, in the liquefied gas supply apparatus 1 of the present embodiment, when the pressure in the container reaches a predetermined pressure or higher, the combustion of the burner 51 of the heat source device 15 is stopped and the heat in the heat source device 15 is reduced. Since the heating of the medium is stopped, an increase in the heating temperature of the container 3 by the heater 11 is suppressed, and when the pressure inside the container 3 reaches or exceeds a predetermined pressure, the pressure inside the container 3 rises more than necessary. Can be suppressed. In addition, it occurs when filling the container with liquefied gas from a lorry,
It is possible to suppress the occurrence of inconveniences such as a longer filling time and an unknown amount of liquefied gas filled in the container.

Further, in this embodiment, the heater 11 is installed on the outer surface of the container 3 which has been conventionally used, and it is not necessary to prepare a dedicated container or the like. Further, the present embodiment is not limited to a large-capacity container such as a container 3 in which a substantially cylindrical container is installed sideways, but various containers, for example, a small cylinder-type container with less restrictions on the installation area and the like. Can also be applied to.

Further, in this embodiment, the pressure switch 9 and the temperature switch 13 are used together, but the temperature switch 13
It is also possible to adopt a configuration not equipped with. However, it is preferable to use the temperature switch 13 in combination because the safety can be improved.

(Second Embodiment) A second embodiment of the insulation detecting device to which the present invention is applied will be described below with reference to FIGS. 1, 2 and 6. FIG. 6 is a flow chart showing the operation of the liquefied gas supply device to which the present invention is applied. In the present embodiment, the same components and operations as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The configuration and the characteristic portion different from those in the first embodiment will be described.

The liquefied gas supply apparatus of this embodiment has the same structure as the liquefied gas supply apparatus of the first embodiment as shown in FIGS. 1 and 2, but is different from the liquefied gas supply apparatus of the first embodiment.
The combustion state of the burner of the heat source machine is switched to two stages, and the temperature of the heating medium heated according to the pressure in the container 3 or the gas pipe 7 is controlled in two stages. That is, in the present embodiment, the heat source device 15 reduces the temperature of the heat medium according to the pressure in the gas pipeline 7 to the lower temperature TH1, for example, 50.
It is controlled to perform a low temperature operation of heating to ° C and a high temperature operation of heating to a higher temperature TH2, for example, 60 ° C.

In this embodiment, the pressure switch 9
Of the two preset temperatures is lower than the lower set pressure P3, for example, less than 0.5 MPa, the switch is turned on and the electric signal S1 is transmitted, and the higher set pressure P4 or higher, for example, 1. When it becomes 0 MPa or more, the switch is turned off to stop the transmission of the electric signal, and when it is lower than the lower set pressure P3 and lower than the higher set pressure P4, the switch is turned on and a distinction from the electric signal S1 is made. Of the electric signal S2 is transmitted. The temperature switch 13 is set to perform the same operation as that of the first embodiment.

In the liquefied gas supply apparatus 1 of the present embodiment as described above, when the operation switch (not shown) electrically connected to the control unit 19 is turned on, the control unit 19 operates as shown in FIG. , The temperature of the filling material (not shown) in the heater 11, that is, the heating temperature of the container 3 by the heater 11,
Determine whether to stop the heat source unit 15 (step 30)
1). At the start of operation, in step 301, the heater 1
If the heating temperature of the container 3 by 1 is higher than the lower set temperature T1, the temperature switch 13 is in the off state and does not emit an electric signal. Therefore, the control unit 19 does not issue a drive command to the heat source device 15, and the heat source device 15 keeps the combustion of the burner 51 and the pump 49 stopped, and stops the flow and heating of the heat medium. (Step 302).

On the other hand, in step 301, the heater 1
When the temperature of the filling material (not shown) in 1 falls below the lower set temperature T1, the temperature switch 13 is turned on and an electric signal is transmitted. At this time, the control unit 19 determines the driving state of the heat source device 15 according to the pressure inside the container 3, that is, the pressure at the exit of the gas pipeline 7 from the container 3 (step 303). In step 303, if the pressure at the outlet of the gas pipeline 7 from the container 3 is less than the lower set pressure P3, the pressure sensor 9 is turned on and the electrical signal S
In order to transmit 1, the control unit 19 drives the burner 51 of the heat source device 15 at high temperature operation and operates the pump 49 to heat the heat medium to the higher temperature TH2 by high temperature operation and The heat medium heated to the temperature TH2 is caused to flow (step 304).

As shown in FIG. 1, the heat medium heated to a temperature TH2, for example, 60.degree. Liquid is sent from 15 to the heater 11. Then, the container 3 and the liquefied gas in the container 3 are heated by the heat of the heat medium heated by the heat source device 15 through the filling in the heater 11, and the liquefied gas in the liquid phase is vaporized. And the saturated vapor pressure of the liquefied gas increases, the pressure in the container 3 increases.

As the pressure inside the container 3 rises due to the heating of the container 3 by the heater 11, etc., as shown in FIG.
When the pressure at the outlet of the gas pipeline 7 from the container 3 becomes equal to or higher than the lower set pressure P3 and lower than the higher set pressure P4,
In step 303, the pressure sensor 9 emits an electric signal S2. Therefore, the control unit 19 controls the heat source device 15
The burner 51 is switched to the low temperature operation, and the heating medium whose heating is controlled to the lower temperature TH1 is made to flow by the low temperature operation (step 305). As a result, the heater 11 heats the container 3 by the heat of the heat medium whose heating is controlled to the lower temperature TH1, so the amount of heat for heating the liquefied gas in the container 3 is reduced, and The rise in temperature and pressure is suppressed, and the portion of the gas pipe 7a in the cylindrical body 95 is kept warm by the heat of the heat medium.

Further, the pressure in the container 3 rises, and the pressure at the outlet of the gas pipeline 7 from the container 3 is higher.
When it becomes 4 or more, in step 303, the pressure sensor 9 is turned off to stop the transmission of the electric signal. For this reason,
The control unit 19 instructs the heat source device 15 to stop the combustion of the burner 51, and the heat source device 15 stops the combustion of the burner 51 and operates only the pump 49 (step 306). As a result, only the flow of the heat medium is performed, and the heating of the container 3 by the heater 11 is performed only by the amount of heat that the heat medium had when the heat source device 15 stopped heating the heat medium. Therefore, the amount of heat for heating the liquefied gas in the container 3 is further reduced, and the rise in temperature and pressure in the container 3 is further suppressed. In addition, since the heat medium flows through the heat medium pipe 17a, the heat of the heat medium keeps the gas pipe line 7a in the cylinder 95 warm and prevents reliquefaction.

The temperature in the container 3 is lowered by the temperature TH1 of the heat medium heated by the heat source device 15 being set to the lower temperature TH1 or the heating of the heat medium by the heat source device 15 being stopped. In step 303, when the pressure becomes lower than the lower set pressure P1 again, the pressure switch 9 is turned on and the electric signal S1 is transmitted, whereby the control unit 19
A combustion command is issued to the heat source device 15 by the high temperature operation of the burner 51, and the higher temperature TH2 due to the high temperature operation of the heat source device 15 is issued.
The heating medium is heated. As a result, step 30 is performed again.
4, the burner 51, the pump 49, etc. of the heat source device 15 are driven to heat the heat medium by high-temperature operation and flow the heat medium.

As described above, the control unit 19 determines the detected pressure according to the pressure in the gas pipe 7 detected by the pressure switch 9 to be the lower set pressure P3 or higher and the higher set pressure P4.
When it is less than, the combustion of the burner 51 of the heat source device 15 is switched to low-temperature operation to suppress the heating heat amount of the liquefied gas in the container 3 by the heater 11, and when it is higher than the set pressure P4,
The combustion of the burner 51 of the heat source device 15 is stopped and the pump 49
By operating only this, the heating amount of the liquefied gas in the container 3 by the heater 11 is further suppressed. Further, when the detected pressure is less than the lower set pressure P3, the heating amount of the liquefied gas in the container 3 by the heater 11 is increased by performing combustion by the high temperature operation of the burner 51 of the heat source device 15 and driving the pump 49. It is increasing. Therefore, the pressure of the liquefied gas in the container 3 is maintained above a predetermined pressure, and the heater 11 is supplied from the heat medium when the pressure in the container 3 or the gas pipeline 7 becomes equal to or higher than the predetermined pressure P3. The amount of heat generated is reduced.

Here, in step 306, the pump 4
Even if the heating amount of the liquefied gas in the container 3 by the heater 11 is suppressed as the operation of 9 only, the container 3 may be heated by a slight amount of heat depending on the conditions such as the outside air temperature.
The temperature inside may keep rising. In this case, container 3
The temperature of the liquefied gas or liquefied gas may exceed the upper limit temperature specified by law, for example. Therefore, as shown in FIG. 6, in step 301, the temperature switch 13 sets the temperature T2 at which the temperature of the filling material of the heater 11 is higher.
When it is above, it is turned off and the transmission of electric signals is stopped. Accordingly, the control unit 19 commands the combustion of the burner 51 of the heat source device 15 and the stop of the drive of the pump 49, and the heat source device 15
Is stopped, and the heat medium flow and heating are stopped.
Therefore, the heating of the container 3 by the heater 11 is stopped,
Since the temperature rise of the container 3 is stopped, the temperature of the container 3 can be prevented from exceeding the predetermined upper limit temperature.

On the other hand, in step 301, when the heating of the container 3 is stopped and the temperature of the container 3 drops and the temperature of the container 3 becomes lower than the set temperature T1 which is the lower one, the temperature switch 13 is turned on again to turn on the electric signal. Is transmitted, and the container 3 is heated by the heater 11 according to the pressure inside the container 3.

As described above, the control unit 19 stops the heat source device 15 when the heating temperature becomes higher than the set temperature T2, which is the higher temperature, according to the heating temperature of the heater 11 for the container 3 detected by the temperature switch 13. The heating of the container 3 by the heater 11 is stopped, and when the lower set temperature T1 is reached, the heat source device 15 is operated according to the pressure in the container 3 to heat the container 3 by the heater 11, The temperature inside 3 is kept below the temperature set as the upper limit, and the temperature inside the container 3 is kept below the temperature set as the lower limit.

By the way, in the liquefied gas supply apparatus of the first embodiment, the heating heat amount of the liquefied gas in the container 3 by the heater 11 is reduced only by stopping the combustion of the burner 51 of the heat source unit 15. . However, only by stopping the combustion of the burner 51 of the heat source device 15 in this way,
When reducing the heating amount of the liquefied gas in the container 3 by the heater 11, the burner 5 may be used depending on the conditions such as the outside temperature.
Since the frequency of ignition and extinguishment of No. 1 increases, not only the burner 51 but also equipment that operates or operates and stops in conjunction with ignition and extinction of the burner 51, for example, is provided in the heat source in-machine gas pipeline 65. Two gas solenoid valves 67,
69, combustion fan 55, spark plug 59, igniter 7
The frequency of activation or deactivation of 4 etc. will also increase. Increasing the frequency of operation and stoppage of the burner 51 and the equipment operating in conjunction with the operation of the burner 51 shortens the life of these equipment and increases the frequency of replacement and maintenance inspection of those equipment. This is not desirable.

On the other hand, in the liquefied gas supply apparatus 1 of this embodiment, when the pressure of the vaporized liquefied gas flowing into the container 3 or the gas pipeline 7 becomes equal to or higher than the lower set pressure P3, By lowering the temperature of the heating medium heated by the heat source device 15, the heating amount of the container 3 heated by the heater 11 is reduced. However, by lowering the temperature of the heated heating medium, under the condition that the pressure in the container 3 rises, the heat in the heat source device 15 becomes higher than the higher set pressure P4. By stopping the heating of the medium and only allowing the heat medium to flow through the pump 49, the amount of heat for heating the container by the liquefied gas heating means is further reduced.

In this way, by performing heating control for lowering the temperature of the heat medium heated by the heat source device 15, the heater 1
1 to reduce the heating amount of the container 3 by heating the heating medium in the heat source unit 15 to stop the heating amount of the container 3 by the heater 11 when the pressure in the container 3 still rises. Therefore, the frequency of ignition and extinction of the burner 51 can be reduced. That is, while suppressing the rise in temperature and pressure in the container when the pressure in the container reaches a predetermined pressure or higher,
In addition to simplifying the configuration of the liquefied gas supply device that keeps the gas pipeline warm and prevents reliquefaction of the liquefied gas in the gas phase in the gas pipeline, the frequency of ignition and extinguishing of the burner can be reduced.

Furthermore, since the frequency of ignition and extinguishing of the burner can be reduced, devices that operate or operate and stop in conjunction with the ignition and extinguishing of the burner 51, for example, two heat source internal gas pipes 65 are provided. Gas solenoid valve 6
It is possible to reduce the frequency of operation or operation and stop of the 7, 69, the combustion fan 55, the spark plug 59, the igniter 74, and the like. Therefore, it is possible to improve the service life of these devices and reduce the frequency of replacement and maintenance inspection of those devices.

(Third Embodiment) A third embodiment of the insulation detecting device to which the present invention is applied will be described below with reference to FIGS. 1, 2 and 7. FIG. 7 is a flowchart showing the operation of the liquefied gas supply device to which the present invention is applied. In the present embodiment, the same components and operations as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted. Etc. will be explained.

The liquefied gas supply apparatus of this embodiment has the same structure as the liquefied gas supply apparatus of the first embodiment as shown in FIGS. 1 and 2, but the difference from the first embodiment is that
As in the second embodiment, the combustion state of the burner of the heat source machine is switched to two stages, and the temperature of the heating medium heated according to the pressure in the container 3 or the gas pipeline 7 is controlled in two stages. is there. However, the second embodiment is different from the second embodiment in that combustion of the burner of the heat source device is stopped according to the temperature inside the container or the heating temperature of the container by the heater, and only the flow of the heat medium is performed by the pump. In the present embodiment, the pressure switch 9 and the temperature switch 13 are set so as to perform the same operations as in the first embodiment.

In the liquefied gas supply apparatus 1 of the present embodiment as described above, when the operation switch (not shown) electrically connected to the control unit 19 is turned on, the control unit 19 operates as shown in FIG. The heat source device 1 is driven by the pump 49 in the heat source device 15 and the temperature of the filling material (not shown) in the heater 11, that is, the heating temperature of the container 3 by the heater 11.
It is determined whether to burn the burner 51 of No. 5 (step 401). At the start of operation, in step 401, the set temperature T of the lower heating temperature of the container 3 by the heater 11 is set.
If it is higher than 1, the temperature switch 13 is off and does not emit an electrical signal. Therefore, the control unit 19 controls the heat source device 1
5, the heat source device 15 remains in the combustion state of the burner 51, and only the flow of the heat medium is performed (step 402).

On the other hand, in step 401, the heater 1
When the temperature of the filling material (not shown) in 1 falls below the lower set temperature T1, the temperature switch 13 is turned on and an electric signal is transmitted. At this time, the control unit 19 determines the driving state of the heat source device 15 according to the pressure inside the container 3, that is, the pressure at the outlet of the gas pipeline 7 from the container 3 (step 403). In step 403, if the pressure at the outlet of the gas pipeline 7 from the container 3 is less than or equal to the lower set pressure P1, the pressure sensor 9 turns on and sends an electric signal. The burner 51 of No. 15 is driven by high temperature operation, and the higher temperature TH2 by high temperature operation
The heating medium is heated (step 404).

As described above, the heat medium heated to the temperature TH2, for example, 60 ° C., which is higher by the high temperature operation of the heat source device 15, flows through the heat medium conduit 17a as shown in FIG. Liquid is sent from 15 to the heater 11. Then, the container 3 and the liquefied gas in the container 3 are heated by the heat of the heat medium heated by the heat source device 15 through the filling in the heater 11, and the liquefied gas in the liquid phase is vaporized. And the saturated vapor pressure of the liquefied gas increases, the pressure in the container 3 increases.

As the pressure inside the container 3 increases due to the heating of the container 3 by the heater 11, etc., as shown in FIG.
When the pressure at the outlet of the gas pipe 7 from the container 3 becomes equal to or higher than the higher set pressure P2, in step 403, the pressure sensor 9 stops the transmission of the electric signal. As a result, the control unit 19 switches the burner 51 of the heat source device 15 to the low temperature operation, and causes the heating-controlled heating medium to flow to the lower temperature TH1 by the low temperature operation (step 40).
5). As described above, since the heater 11 heats the container 3 by the heat of the heat medium whose heating is controlled to the lower temperature TH1, the amount of heat for heating the liquefied gas in the container 3 is reduced, and the inside of the container 3 is reduced. The increase in temperature and pressure is suppressed, and the gas pipe 7a in the cylindrical body 95 is kept warm by the heat of the heat medium.

Further, when the temperature inside the container 3 rises and the heating temperature of the container 3 by the heater 11 exceeds the set temperature T2 in step 401, the temperature switch 13 is turned off and no electric signal is transmitted. Therefore, step 4
02, the control unit 19 controls the burner 51 to the heat source unit 15.
The heat source unit 15 stops the combustion of the burner 51 and operates only the pump 49. As a result, only the flow of the heat medium is performed, and the heating of the container 3 by the heater 11 is performed only by the amount of heat that the heat medium had when the heat source device 15 stopped heating the heat medium. Therefore, the amount of heat for heating the liquefied gas in the container 3 is further reduced, and the rise in temperature and pressure in the container 3 is further suppressed. In addition, since the heat medium flows through the heat medium pipe 17a, the heat of the heat medium keeps the gas pipe line 7a in the cylinder 95 warm and prevents reliquefaction.

The pressure in the container 3 is lowered by the temperature TH1 of the heat medium heated by the heat source device 15 being set to the lower temperature TH1 or the heating of the heat medium by the heat source device 15 being stopped. In step 401, when the heating temperature of the container 3 by the heater 11 becomes lower than the lower set temperature T1 again, the temperature switch 13 is turned on and an electric signal is transmitted, so that the control unit 19 causes the gas pipeline 7 to operate. In accordance with the pressure of the outlet portion from the container 3, the burner 51 is instructed to burn by the high temperature operation or the low temperature operation of the burner 51, and the heat medium is heated by the high temperature operation or the low temperature operation of the heat source device 15.

As described above, when the pressure in the gas pipe 7 rises and the pressure detected by the pressure switch 9 becomes higher than the higher pressure P2, the control unit 19 operates the burner 51 of the heat source device 15 at a low temperature. The heating amount of the liquefied gas in the container 3 by the heater 11 is suppressed and the heating amount of the liquefied gas in the container 3 by the heater 11 is suppressed. Further, even if the combustion of the burner 51 of the heat source device 15 is switched to the low temperature operation depending on the conditions such as the outside air temperature, the container 3 by the heater 11 is changed.
When the heating temperature of the heat source rises and the temperature detected by the temperature switch 13 becomes higher than the higher temperature T2, the combustion of the burner 51 of the heat source device 15 is stopped and only the pump 49 is operated, whereby the container by the heater 11 is heated. The heating amount of the liquefied gas in 3 is further suppressed.

Therefore, also in the liquefied gas supply apparatus 1 of the present embodiment, the heating control for lowering the temperature of the heat medium heated by the heat source device 15 is performed, so that the container 3 by the heater 11 is controlled.
In the case of the condition that the heating heat amount of No. 2 is reduced and the temperature and pressure inside the container 3 still rise, the heating of the heating medium in the heat source device 15 is stopped to further increase the heating heat amount of the container 3 by the heater 11. It is decreasing. Therefore, as in the second embodiment, the frequency of ignition and extinction of the burner 51 can be reduced. That is, when the pressure in the container reaches a predetermined pressure or higher, while keeping the temperature and pressure in the container from rising, the gas pipeline is kept warm to reliquefy the liquefied gas in the gas phase. In addition to simplifying the configuration of the liquefied gas supply device for preventing, the frequency of ignition and extinguishing of the burner can be reduced.

(Fourth Embodiment) The fourth embodiment of the insulation detecting device to which the present invention is applied will be described below with reference to FIGS. 1, 2 and 8. FIG. 8 is a flow chart showing the operation of the liquefied gas supply device to which the present invention is applied. In addition, in the present embodiment, the same components and operations as those in the first to third embodiments are designated by the same reference numerals, and the description thereof will be omitted. Configurations and characteristic portions different from those in the first to third embodiments Etc. will be explained.

The liquefied gas supply apparatus of this embodiment has the same structure as the liquefied gas supply apparatus of the first embodiment as shown in FIGS. 1 and 2, and has the same heat source as the second and third embodiments. Change the combustion state of the burner of the machine to two stages,
The temperature of the heating medium heated according to the pressure inside or inside the gas pipe 7 is controlled in two stages. However, the difference from the first, second, and third embodiments is that the control unit does not perform the operation of stopping the combustion of the burner of the heat source device and performing only the flow of the heat medium by the pump, but the heat source. The burner of the machine is configured to perform only the operation of switching the combustion state in two stages, and the heating medium is heated and controlled so that the temperature of the heated heat medium in the low-temperature operation of the heat source machine is 35 ° C. or less.

That is, the heat source unit 15 of the present embodiment uses a remodeled software of a commercially available domestic water heater or hot water heater, and the burner 51 and the pump 4 are used.
9 operation can be controlled separately, and in the low temperature operation, the heating medium is heated and controlled to a lower temperature TH3 set to 20 ° C. or higher and 35 ° C. or lower, for example, 30 ° C., and in the high temperature operation, the inside of the container 3 is controlled. Is controlled so that the heating medium is heated to a higher temperature TH4, for example, 50 ° C., which is set so that it can be heated sufficiently to maintain the required pressure. In this embodiment, the pressure switch 9 and the temperature switch 13 are set so as to perform the same operations as in the first embodiment.

In the liquefied gas supply apparatus 1 according to the present embodiment as described above, when the operation switch (not shown) electrically connected to the control unit 19 is turned on, the control unit 19 is operated as shown in FIG. , The temperature of the filling material (not shown) in the heater 11, that is, the heating temperature of the container 3 by the heater 11,
It is determined whether to stop the heat source unit 15 (step 50).
1). At the start of operation, in step 501, the heater 1
If the heating temperature of the container 3 by 1 is higher than the lower set temperature T1, the temperature switch 13 is in the off state and does not emit an electric signal. Therefore, the control unit 19 does not issue a drive command to the heat source device 15, and the heat source device 15 is in a state where the combustion of the burner 51 and the pump 49 are stopped (step 502).

On the other hand, in step 501, the heater 1
When the temperature of the filling material (not shown) in 1 falls below the lower set temperature T1, the temperature switch 13 is turned on and an electric signal is transmitted. At this time, the control unit 19 determines the driving state of the heat source device 15 according to the pressure inside the container 3, that is, the pressure at the outlet of the gas pipeline 7 from the container 3 (step 503). In step 503, if the pressure at the outlet of the gas pipeline 7 from the container 3 is lower than the lower set pressure P1, the pressure sensor 9 is turned on and an electric signal is transmitted. The burner 51 of No. 15 is driven by high temperature operation, and the higher temperature TH4 by high temperature operation
The heating medium is heated (step 504).

In this way, the heat medium heated to a temperature TH4, for example, 50 ° C., which is higher by the high temperature operation of the heat source device 15, flows through the heat medium conduit 17a as shown in FIG. Liquid is sent from 15 to the heater 11. Then, the container 3 and the liquefied gas in the container 3 are heated by the heat of the heat medium heated by the heat source device 15 through the filling in the heater 11, and the liquefied gas in the liquid phase is vaporized. And the saturated vapor pressure of the liquefied gas increases, the pressure in the container 3 increases.

As the pressure inside the container 3 rises due to the heating of the container 3 by the heater 11, etc., as shown in FIG.
When the pressure at the outlet of the gas conduit 7 from the container 3 becomes equal to or higher than the higher set pressure P2, the pressure sensor 9 stops transmitting an electric signal in step 503. This allows
The control unit 19 switches the burner 51 of the heat source device 15 to the low temperature operation, and causes the heat medium whose heating is controlled to reach the lower temperature TH3, for example, 30 ° C., to flow through the low temperature operation (step 505). ). The lower temperature TH3 is
The temperature is set to 35 ° C. or lower at which the container 3 is hardly heated. Therefore, even if the heating medium whose heating is controlled to the lower temperature TH3 flows into the heater 11, the temperature inside the container 3 hardly rises due to the heating by the heater 11, so that the temperature inside the container 3 and The rise in pressure is suppressed. However, the lower temperature TH3 is 20 ° C. at which the gas pipe 7a in the cylinder 95 can be heated to a temperature at which it is not reliquefied.
Since the temperature is set to the above temperature, the portion of the gas pipeline 7a in the tubular body 95 is kept warm by the heat of the heat medium whose heating is controlled to the substantially lower temperature TH3 flowing through the heat medium pipeline 17a. .

As described above, when the detected pressure becomes equal to or higher than the higher set pressure P2 in accordance with the pressure in the gas pipeline 7 detected by the pressure switch 9, the control unit 19 causes the burner 51 of the heat source unit 15 to operate. Switch the combustion to low temperature operation and heat source unit 15
The heat medium heated by the combustion of the burner 51 of
By controlling the heating to the lower temperature TH3 which is the following,
Due to the heating by the heater 11, the temperature in the container 3 hardly rises, and the gas pipe 7a in the cylindrical body 95 is formed.
The part is kept warm by the heat of the heat medium whose heating is controlled to the lower temperature TH3. Further, when the detected pressure is equal to or lower than the lower set pressure P1, combustion is performed by the high temperature operation of the burner 51 of the heat source device 15 so that the liquefied gas in the container 3 can be heated by the heater 11. Therefore, the pressure of the liquefied gas in the container 3 is maintained at a predetermined pressure or higher, and the pressure in the container 3 or the gas pipeline 7 is supplied from the heat medium to the heater 11 when the pressure becomes equal to or higher than the predetermined pressure P2. The amount of heat generated is reduced.

Here, depending on the conditions such as the outside temperature,
Reliquefaction may not occur even if the gas pipe 7a portion in the cylinder 95 is not kept warm by the heat of the heat medium. For this reason,
The temperature switch 13, as shown in FIG.
In No. 1, when the temperature of the filling material of the heater 11 becomes equal to or higher than the higher set temperature T2, it is turned off and the transmission of the electric signal is stopped. Therefore, the control unit 19 controls the burner 5 of the heat source unit 15.
The combustion source 1 and the driving of the pump 49 are stopped, the heat source device 15 is stopped, and the flow and heating of the heat medium are stopped. As a result, the tubular body 9
If reliquefaction does not occur even if the gas pipe 7a portion in 5 is not kept warm by the heat of the heat medium, unnecessary energy consumption by the heat source device 15 can be eliminated. In addition, unnecessary increases in temperature and pressure of the container 3 can be suppressed.

As described above, in the liquefied gas supply apparatus 1 of the present embodiment, when the pressure of the vaporized liquefied gas flowing into the gas pipeline 7 becomes equal to or higher than the higher set pressure P2, the heat source unit 15
Becomes a low temperature operation, and the temperature of the heat medium heated by the heat source device 15 becomes 35 ° C. or lower. When the temperature of the heat medium is 35 ° C. or less, the container 11 can hardly be heated and heated by the heat amount of the heat medium, but the gas phase in the gas pipe 7a portion of the cylindrical body 95 is Reliquefaction can be prevented by keeping the liquefied gas warm. Therefore, unlike the conventional liquefied gas supply device, which does not include a heat medium amount adjusting means, it is possible to suppress an increase in temperature and pressure in the container 3, and
The heat held by the heat medium keeps the vapor-phase liquefied gas in the gas pipeline 7a warm and prevents re-liquefaction of the vapor-phase liquefied gas in the gas pipeline 7a. Therefore, when the pressure in the container reaches a predetermined pressure or higher, the gas pipeline is kept warm and the liquefied gas in the gas phase is reliquefied while keeping the temperature and pressure in the vessel from rising. The configuration of the liquefied gas supply device for preventing can be simplified.

(Fifth Embodiment) A fifth embodiment of the insulation detecting apparatus to which the present invention is applied will be described below with reference to FIGS. 2 and 9 to 13. FIG. 9 is a diagram showing a schematic configuration and operation of a liquefied gas supply device to which the present invention is applied. FIG. 10 is a block diagram showing a connection state and operation between the control unit and each device. FIG. 11 is a diagram showing a schematic configuration of a circuit included in the control unit. FIG. 12 is a diagram for explaining on / off operations of the pressure switch, the temperature switch, and the gas temperature switch. FIG. 13 is a flowchart showing the operation of the liquefied gas supply device to which the present invention is applied.
In the present embodiment, the same components and operations as those in the first to fourth embodiments are designated by the same reference numerals, and the description thereof will be omitted. Etc. will be explained.

The liquefied gas supply device of this embodiment is different from the first to fourth embodiments in that it is equipped with a gas temperature detecting means for detecting the temperature of the gas phase liquefied gas in the gas pipeline, and has a control unit. The purpose is to control the operation of the heat source device according to the temperature detected by the gas temperature detection means when the pressure inside the container 3 becomes equal to or higher than a predetermined pressure. That is, as shown in FIGS. 9 and 10, the liquefied gas supply device 107 according to the present embodiment includes the gas pipeline 7 connected to the micro gas turbine 25.
A is equipped with a gas temperature switch 109 for detecting the temperature in the gas pipeline 7a, that is, the temperature of the gas phase liquefied gas flowing in the gas pipeline 7a. Gas temperature switch 10
9 is installed in a portion of the gas pipeline 7a downstream of the shutoff valve 29 with respect to the gas flow and upstream of the cylinder 95, and is electrically connected to the control unit 19 via the wiring 33. Has been done.

As shown in FIG. 11, the control unit 19 of this embodiment operates with respect to the power source 111 which controls the operation of the heat source device 15 by turning on / off the pressure switch 9, the temperature switch 13 and the gas temperature switch 109. Switch 113,
A relay coil 115 that constitutes the relay R, an intrinsically safe circuit 117, and the like are connected in series. Further, gas temperature switches 119 connected in series to the power source 111 and in parallel to the intrinsically safe circuit 117 and in parallel with each other.
The pressure switch 9 and the temperature switch 13 are sequentially connected. On the other hand, at the operation command terminal (not shown) of the heat source device control means 53 provided in the heat source device 15, the relay contact 1 forming the relay R together with the relay coil 115.
21 is connected. The gas temperature switch 11
The contact points of the pressure switch 9, the pressure switch 9, and the temperature switch 13 are closed when they are turned on and open when they are turned off. The relay contact 121 energizes the relay coil 115. And the relay coil 115 is opened when the power supply to the relay coil 115 is cut off.

In this embodiment, the gas temperature switch 109 is used.
Is for switching between signal transmission and stop at two preset temperatures, and as shown in FIG. 12, the set temperature T3 of the lower of the two set temperatures, which is the lower gas temperature. , For example, the switch turns on at 15 ℃,
The gas temperature rises and the higher set temperature T4, for example, 20
The switch is set to turn off at ℃.
The operation settings of the pressure switch 9 and the temperature switch 13 are the same as those in the first embodiment. Further, the heat source device 15 of the present embodiment has the same configuration as that of the first embodiment as shown in FIG. 2, and similarly to the first embodiment, a two-stage burner of high temperature operation and low temperature operation. Among the combustion states of 51, it is controlled only to perform the high temperature operation of heating the heating medium to the higher temperature TH2, for example, 60 ° C.

When the operation switch 113 provided in the circuit of the control unit 19 is turned on, the control unit 19 operates as shown in FIG.
As shown in, the temperature of the filling material (not shown) in the heater 11, that is, the heating temperature of the container 3 by the heater 11 determines whether or not to stop the heat source device 15 (step 6).
01). At the start of the operation, in step 601, if the heating temperature of the container 3 by the heater 11 is higher than the lower set temperature T1, as shown in FIG.
Is off and the contacts remain open. Therefore, the relay coil 115 of the relay R is not energized, and the relay contact 121 of the relay R remains open, so the heat source device 15 is not driven, and the heat source device 15 stops the combustion of the burner 51 and the pump 49. As shown in FIG. 13, the flow of the heating medium and the heating are stopped (step 6).
02).

On the other hand, in step 601, the heater 1
When the temperature of the filling material (not shown) in 1 falls below the lower set temperature T1, the temperature switch 13 is turned on and closed as shown in FIG. At this time, the control unit 19
13, as shown in FIG. 13, according to the pressure in the container 3, that is, the pressure at the exit portion of the gas pipeline 7 from the container 3,
5 is determined (step 603). Step 603
11, if the pressure at the outlet of the gas pipe 7 from the container 3 is lower than the set pressure P1, the pressure sensor 9 is turned on and closed as shown in FIG. The relay contact 121 of the relay R is closed. Therefore, as shown in FIG. 13, the burner 51, the pump 49, and the like of the heat source device 15 are driven to heat the heating medium and flow the heating medium at high temperature (step 604).

As described above, the heat medium heated to a higher temperature, for example, 60 ° C. by the high temperature operation of the heat source device 15 is
As shown in FIG. 9, the heat medium pipe 17a flows through the heat source unit 1
Liquid is sent from 5 to the heater 11. Then, the container 3 and the liquefied gas in the container 3 are heated by the heat of the heat medium heated by the heat source device 15 through the filling in the heater 11, and the liquefied gas in the liquid phase is vaporized. And the saturated vapor pressure of the liquefied gas increases, the pressure in the container 3 increases.

As the pressure inside the container 3 rises due to the heating of the container 3 by the heater 11, etc., as shown in FIG. 13, the pressure at the outlet of the gas pipeline 7 from the container 3 is higher than the set pressure. When P2 or more, as shown in FIG. 11, the pressure sensor 9 is turned off and opened in step 603. At this time, the driving state of the heat source device 15 is such that the gas pipeline 7a
It is determined by the temperature of the liquefied gas in the gas phase inside (step 6
05). In step 605, when the temperature of the vapor phase liquefied gas in the gas pipeline 7a is higher than the lower set temperature T3, the gas temperature switch 109 is open in the OFF state, and therefore the relay of the relay R is relayed. The power supply to the coil 115 is cut off, the relay contact 121 of the relay R is opened, the combustion of the burner 51 of the heat source device 15 and the drive of the pump 49 are stopped, and the heating and flow of the heat medium are stopped, so the heater 11 The heating of the liquefied gas in the container 3 due to is stopped (step 6
06).

Since the lower set temperature T3 is set as a temperature at which reliquefaction may occur when the temperature of the gas phase liquefied gas becomes lower than the lower set temperature T3, the gas phase liquefaction If the gas temperature is higher than the lower set temperature T3, reliquefaction does not occur. Therefore, re-liquefaction does not occur even when the flow of the heat medium is stopped, and the heater 11
By stopping the heating of the liquefied gas in the container 3 due to the above, the rise in temperature and pressure in the container 3 is suppressed.

On the other hand, due to the influence of the outside temperature, the gas pipeline 7
When the temperature of the vapor-phase liquefied gas in a falls to the lower set temperature T3 or lower, in step 605, as shown in FIG.
As shown in, the gas temperature switch 109 is turned on and closed, so that the relay coil 115 of the relay R is energized and the relay contact 121 of the relay R is closed. Therefore, FIG.
As shown in FIG. 3, the burner 51 of the heat source device 15 and the pump 4
9 and the like are driven, and heating of the heating medium and flow of the heating medium by high-temperature operation are performed (step 604). As a result, the heat of the heat medium heated by the high-temperature operation of the burner 51 of the heat source device 15 keeps the temperature of the gas pipeline 7a in the tubular body 95, and the temperature of the gas phase liquefied gas in the gas pipeline 7a. Rise and prevent reliquefaction.

When the temperature of the vapor phase liquefied gas in the gas pipeline 7a rises to reach the higher set temperature T4 or higher, the gas temperature switch 109 is turned off and opened as shown in FIG. The power supply to the relay coil 115 is cut off, and the relay contact 121 of the relay R is opened. This allows
As shown in FIG. 13, again, in step 606, the combustion of the burner 51 of the heat source device 15 and the driving of the pump 49 are stopped, and the heating of the heat medium and the flow of the heat are stopped. The heating of the liquefied gas in 3 is stopped, and the rise in temperature and pressure in the container 3 is suppressed.

Further, when the heating of the heat medium by the heat source device 15 is stopped and the like, the pressure inside the container 3 is lowered, and in step 603, when the pressure becomes lower than the lower set pressure P1 again, as shown in FIG. Then, when the pressure switch 9 is turned on and closed, the relay coil 115 of the relay R is energized and the relay contact 121 of the relay R is closed. As a result, as shown in FIG. 13, in step 604, the burner 51, the pump 49, etc. of the heat source device 15 are driven to heat the heating medium by high-temperature operation and flow the heating medium.

Here, when the container 3 is heated by the heater 11 in step 604, the temperature inside the container 3 rises, and the temperature of the container 3 and the liquefied gas rises to the upper limit temperature stipulated by law, for example. May exceed. Therefore, in step 601, the temperature switch 13
When the temperature of the filling material of the heater 11 becomes equal to or higher than the higher set temperature T2, it is turned off and opened. As a result, the power supply to the relay coil 115 of the relay R is cut off, the relay contact 121 of the relay R is opened, the combustion of the burner 51 of the heat source device 15 and the driving of the pump 49 are stopped, and the flow and heating of the heat medium are stopped. To stop. Therefore, the heating of the container 3 by the heater 11 is stopped and the temperature rise of the container 3 is stopped, so that the temperature of the container 3 can be prevented from exceeding the predetermined upper limit temperature. On the other hand, step 6
In 01, when the heating of the container 3 is stopped and the temperature of the container 3 decreases, and the temperature of the container 3 becomes lower than the lower set temperature T1, the temperature switch 13 is turned on and closed again,
The container 3 is heated by the heater 11 according to the internal pressure and the temperature of the gas phase liquefied gas in the gas pipeline 7a.

Here, when the pressure of the vapor phase liquefied gas flowing into the container 3 or the gas pipeline 7 becomes equal to or higher than the set pressure P2, the vapor phase liquefied gas flowing from the vessel 3 into the gas pipeline 7 is reached. The temperature is high enough not to reliquefy. Therefore, the liquefied gas supply device 1 of the present embodiment
In 07, when the pressure of the gas phase liquefied gas becomes equal to or higher than the set pressure P2, the driving of the pump 49 of the heat source device 15 is normally stopped, and the heating of the container 3 by the heater 11 is stopped. When the pressure of the gas phase liquefied gas flowing into the container 3 or the gas pipeline 7 becomes equal to or higher than the set pressure P2,
Only when the temperature of the vapor phase liquefied gas in the gas pipeline 7a decreases due to the influence of the outside air temperature and becomes close to the temperature for reliquefaction, the temperature of the vapor phase liquefied gas in the gas pipeline 7a Heat source unit 1 only until the temperature exceeds the set temperature T4.
The pump 49 of No. 5 is driven to flow the heated heating medium.

Therefore, in the liquefied gas supply device 107 of the present embodiment, when the pressure of the liquefied gas in the gas phase flowing into the gas pipe 7 becomes equal to or higher than the set pressure P2, the liquefaction in the gas phase in the gas pipe 7a is liquefied. When the gas is at a temperature that does not reliquefy,
The pump 49 of the heat source device 15 is stopped to stop the flow of the heat medium to stop the heating of the container 3 by the heater 11. on the other hand,
When the temperature of the gas-phase liquefied gas in the gas pipeline 7a is reduced to a temperature at which the gas-phase liquefied gas is likely to be reliquefied, the heat source device 15 is operated only until the gas-phase liquefied gas in the gas pipeline 7a reaches a temperature at which it is not reliquefied. The burner 51 is burned at a high temperature and the pump 49 is driven to flow the heated heat medium to keep the gas pipe 7a warm.
Therefore, unlike the conventional liquefied gas supply device, it does not include a heat medium amount adjusting means, but when the pressure in the container 3 reaches or exceeds a predetermined pressure, it is possible to suppress an increase in temperature or pressure in the container 3. At the same time, it is possible to prevent reliquefaction of the gas phase liquefied gas in the gas pipeline 7a. That is, when the pressure in the container reaches a predetermined pressure or higher, while keeping the temperature and pressure in the container from rising, the gas pipeline is kept warm to reliquefy the liquefied gas in the gas phase. The configuration of the liquefied gas supply device for preventing can be simplified.

(Sixth Embodiment) A sixth embodiment of the insulation detecting device to which the present invention is applied will be described below with reference to FIGS. 2, 9 and 14. FIG. 14 is a flow chart showing the operation of the liquefied gas supply device to which the present invention is applied. In the present embodiment, the same components and operations as those in the first to fifth embodiments are designated by the same reference numerals, and the description thereof will be omitted. Etc. will be explained.

Like the fifth embodiment, the liquefied gas supply apparatus of the present embodiment is equipped with a gas temperature detecting means for detecting the temperature of the liquefied gas in the gas phase in the gas pipeline, and the control unit has a gas temperature of The operation of the heat source device is controlled according to the temperature detected by the detection means. However, the liquefied gas supply device of the present embodiment, depending on the temperature detected by the gas temperature detection means, the operation of the heat source device, a state in which the burner is operated at a low temperature, and a state in which combustion of the burner and driving of the pump are stopped. It differs from the fifth embodiment in that it is switched between the two. That is, the heat source device 15 of the present embodiment has the configuration shown in FIG. 2 similarly to the first embodiment, and further, in the same manner as the second embodiment, according to the command signal of the control unit 19 and the like. The combustion state of the burner 51 is switched between a low temperature operation in which it is heated to a lower temperature TH1, for example 50 ° C., and a high temperature operation in which it is heated to a higher temperature TH2, for example 60 ° C. In this embodiment, the operation settings of the pressure switch 9, the temperature switch 13, and the gas temperature switch 109 are the same as those in the fifth embodiment.

In the liquefied gas supply apparatus 107 of the present embodiment as described above, when the operation switch electrically connected to the control unit 19 is turned on, the control unit 19 heats the heater 11 as shown in FIG. Depending on the temperature of the filling material (not shown) inside, that is, the heating temperature of the container 3 by the heater 11, the heat source unit 1
It is determined whether to stop 5 (step 701). At the start of the operation, in step 301, if the heating temperature of the container 3 by the heater 11 is higher than the lower set temperature T1, the temperature switch 13 is in the off state and no electric signal is transmitted. For this reason, the control unit 19 does not issue a drive command to the heat source device 15, and the heat source device 15 burns the burner 51 and pumps the pump 4.
9 is still stopped, and the flow of heat medium and the heating are stopped (step 702).

On the other hand, in step 701, the heater 1
When the temperature of the filling material (not shown) in 1 falls below the lower set temperature T1, the temperature switch 13 is turned on and an electric signal is transmitted. At this time, the control unit 19 determines the driving state of the heat source device 15 according to the pressure inside the container 3, that is, the pressure at the outlet of the gas pipeline 7 from the container 3 (step 703). In step 703, if the pressure at the outlet of the gas pipeline 7 from the container 3 is not higher than the lower set pressure P1, the pressure sensor 9 is turned on and an electric signal is transmitted. 15 burners 5
1 is driven in a high temperature operation and the pump 49 is operated to heat the heating medium to the higher temperature TH2 and to flow the heating medium heated to the higher temperature TH2 in the high temperature operation (step 704). ).

As described above, the heat medium heated to a temperature TH2, for example, 60 ° C., which is higher by the high temperature operation of the heat source device 15, flows through the heat medium conduit 17a as shown in FIG. Liquid is sent from 15 to the heater 11. Then, the container 3 and the liquefied gas in the container 3 are heated by the heat of the heat medium heated by the heat source device 15 through the filling in the heater 11, and the liquefied gas in the liquid phase is vaporized. And the saturated vapor pressure of the liquefied gas increases, the pressure in the container 3 increases.

As the pressure inside the container 3 rises due to the heating of the container 3 by the heater 11, etc., as shown in FIG. 14, the pressure at the outlet of the gas pipeline 7 from the container 3 is lower than the set pressure. When P2 or more, in step 703, the pressure sensor 9 is turned off and the transmission of the electric signal is stopped. At this time, the control unit 19 determines the driving state of the heat source device 15 according to the temperature of the gas phase liquefied gas in the gas pipeline 7a (step 705). In step 705, when the temperature of the gas phase liquefied gas in the gas pipeline 7a is equal to or lower than the lower set temperature T3, the gas temperature sensor 109 turns on and transmits an electric signal. As a result, the control unit 19
The burner 51 of the heat source device 15 is driven at low temperature operation, and the pump 49 is operated to heat the heat medium to the lower temperature TH1 by the low temperature operation, and to pass the heat medium heated to the lower temperature TH1. Flow (step 706).

As described above, when the pressure in the container 3 becomes equal to or higher than the predetermined pressure and the temperature of the liquefied gas in the gas phase in the gas pipeline 7a is close to the temperature at which there is a possibility of reliquefaction, the lower one The heater 11 heats the container 3 by the heat of the heat medium whose heating is controlled to the temperature TH1. Therefore, the amount of heat for heating the liquefied gas in the container 3 is reduced, the rise in temperature and pressure in the container 3 is suppressed, and the gas pipeline 7a portion in the cylindrical body 95 is kept warm by the heat of the heat medium. .

On the other hand, the temperature of the vapor phase liquefied gas in the gas pipeline 7a rises, and in step 705, the gas pipeline 7a
When the temperature of the liquefied gas in the inside becomes higher than the set temperature T4, which is the higher temperature, the gas temperature sensor 109 is turned off and the transmission of the electric signal is stopped. Therefore, the control unit 19 stops the drive command to the heat source device 15, and the heat source device 15 causes the burner 5 to operate.
Since the combustion of No. 1 and the pump 49 are stopped, the flow and heating of the heat medium are stopped (step 707).

In this way, when the temperature of the gas phase liquefied gas in the gas pipeline 7a reaches a temperature at which reliquefaction does not occur when the pressure in the container 3 is equal to or higher than a predetermined pressure, the heat source device 15 is stopped, Heating the liquefied gas in the container 3 by the heater 11 and the cylinder 95
Insulation of the inner gas pipe 7a is stopped.

Further, when the temperature of the vapor phase liquefied gas in the gas pipeline 7a decreases again and the temperature of the vapor phase liquefied gas in the gas pipeline 7a becomes equal to or lower than the lower set temperature T3, in step 705. The gas temperature sensor 109 is turned on and transmits an electric signal. Therefore, in Step 706, the control unit 19 drives the burner 51 of the heat source device 15 in the low temperature operation and operates the pump 49 to heat the heat medium to the lower temperature TH1 by the low temperature operation, and this low temperature is set. The heat medium heated to the other temperature TH1 is caused to flow.

In step 701, the temperature switch 13
When the heat source device 15 is turned on or the heat source device 15 is operated at a low temperature, or the heat source device 15 is stopped, the pressure in the container 3 decreases.
In step 703, when the pressure of the outlet portion from the container 3 of the gas pipeline 7 becomes lower than the lower pressure P1, the pressure switch 9 is turned on and an electric signal is transmitted,
The control unit 19 issues a combustion command to the heat source device 15 by the high temperature operation of the burner 51, and heats the heat medium to the higher temperature TH2 by the high temperature operation of the heat source device 15. As a result, in step 704, the burner 51 of the heat source device 15 and the pump 4
9 is driven to heat the heat medium by high-temperature operation and flow the heat medium.

Here, in order to prevent the temperature of the container 3 and the liquefied gas from exceeding the upper limit temperature specified by law, for example, due to environmental conditions such as the outside air temperature, the temperature switch 13 is shown in FIG. As described above, in step 701, the set temperature T of the higher temperature of the filling material of the heater 11 is set.
When it becomes 2 or more, it turns off and stops transmitting electric signals. Accordingly, the control unit 19 commands the combustion of the burner 51 of the heat source device 15 and the stop of the drive of the pump 49, and the heat source device 15
Is stopped, and the heat medium flow and heating are stopped.
Therefore, the heating of the container 3 by the heater 11 is stopped,
Since the temperature rise of the container 3 is stopped, the temperature of the container 3 can be prevented from exceeding the predetermined upper limit temperature. On the other hand, in step 701, when the heating of the container 3 is stopped and the temperature of the container 3 decreases, and the temperature of the container 3 becomes lower than the lower set temperature T1, the temperature switch 13 is turned on again and an electric signal is transmitted. The container 3 is heated by the heater 11 according to the pressure inside the container 3.

By the way, in the liquefied gas supply apparatus of the fifth embodiment, the heat source unit 15 is driven and stopped in accordance with the temperature of the liquefied gas in the gas phase in the gas pipeline 7a. It is intended to prevent reliquefaction of the vaporized liquefied gas and reduce the amount of heat of heating the liquefied gas in the container 3 by the heater 11 when the pressure in the container 3 becomes equal to or higher than a predetermined pressure.
However, when the heating heat amount of the liquefied gas in the container 3 by the heater 11 is reduced only by driving and stopping the heat source device 15 in this way, depending on the conditions such as the outside air temperature, the gas in the gas pipeline 7a may be Since the temperature of the liquefied gas in the phase is likely to drop and the heat source device 15 is frequently driven, it may not be possible to sufficiently suppress the increase in the temperature and pressure of the container 3. On the other hand, in the liquefied gas supply apparatus of the present embodiment, if the pressure in the container 3 is equal to or higher than a predetermined pressure and the temperature of the vaporized liquefied gas in the gas pipeline 7a is a temperature at which reliquefaction does not occur, the heat source The machine 15 is stopped and the liquefied gas in the container 3 is heated by the heater 11,
Insulation of the gas pipe 7a in the cylinder 95 is stopped. On the other hand, if the pressure in the container 3 becomes equal to or higher than a predetermined pressure and the temperature of the gas phase liquefied gas in the gas pipeline 7a is close to the temperature at which reliquefaction may occur, the heating control is performed to the lower temperature TH1. The heater 11 heats the container 3 by the heat of the heat medium. Therefore, when the pressure inside the container 3 is equal to or higher than a predetermined pressure but it is necessary to keep the temperature of the gas pipeline 7a, the container 3
The amount of heat for heating the liquefied gas inside is reduced compared to when the pressure inside the container 3 is lower than a predetermined pressure, and the rise in temperature and pressure inside the container 3 is suppressed. Therefore, as compared with the fifth embodiment, it is possible to further suppress an increase in temperature and pressure inside the container 3 when the pressure inside the container 3 becomes equal to or higher than a predetermined pressure.

Furthermore, in the liquefied gas supply apparatus of the fifth embodiment, the heat source device is adjusted in accordance with the pressure of the gas pipe 7 at the outlet from the container 3 and the temperature of the gas phase liquefied gas in the gas pipe 7a. 15 is driven and stopped to prevent reliquefaction of the gas phase liquefied gas in the gas pipeline 7a and liquefaction of the container 3 by the heater 11 when the pressure in the container 3 exceeds a predetermined pressure. We are trying to reduce the heating heat of gas. However, as described above, by driving and stopping the heat source device 15 according to the pressure of the outlet portion from the container 3 of the gas pipeline 7 and the temperature of the liquefied gas in the gas phase in the gas pipeline 7a, the heater 11 When reducing the amount of heat of heating the liquefied gas in the container 3 due to the above, the frequency of ignition and extinguishing of the burner 51 and the frequency of starting and stopping the pump 49 increase depending on conditions such as the outside air temperature. In addition, devices that operate or operate and stop in conjunction with ignition and extinguishing of the burner 51, for example, two gas solenoid valves 67 and 69, a combustion fan 55, and an ignition plug provided in the heat source gas line 65 in the machine. 5
9. The frequency of activation or deactivation of the igniter 74 or the like also increases. Burner 51 and burner 51
Increasing the frequency of activating and deactivating equipment that operates in tandem with the operation of the equipment shortens the life of these equipment and increases the frequency of replacement and maintenance of these equipment. Is not desirable.

On the other hand, in the liquefied gas supply apparatus of this embodiment, the operating state of the burner 51 of the heat source device 15 is changed between the high temperature operation and the low temperature operation according to the pressure of the outlet of the gas pipe 7 from the container 3. The heat source device 15 is controlled to be driven and stopped according to the temperature of the gas phase liquefied gas in the gas pipeline 7a. Therefore, as compared with the fifth embodiment, the frequency of starting and stopping the pump 49 and the frequency of ignition and extinguishing of the burner 51 can be reduced.

Furthermore, since the frequency of ignition and extinguishing of the burner 51 can be reduced, the devices that operate or operate and stop in conjunction with the ignition and extinguishing of the burner 51, such as the heat source internal gas pipeline 65 It is possible to reduce the frequency of activation or deactivation of one of the gas solenoid valves 67 and 69, the combustion fan 55, the ignition plug 59, the igniter 74, and the like. Therefore, the pump 49 and the burner 5
1, the life of these devices can be improved, and the replacement frequency and maintenance inspection frequency of these devices can be reduced.

Further, in the first to sixth embodiments, the pressure switch 9, the temperature switch 13, the gas temperature switch 1 are used as the pressure detecting means, the temperature detecting means, and the gas temperature detecting means.
09, the pressure detecting means, the temperature detecting means, and the gas temperature detecting means are various pressure detecting means such as a pressure sensor and a temperature sensor as long as they can detect pressure or temperature, temperature detecting means, gas temperature. Sensing means can be used. Further, the temperature detecting means does not detect the temperature of the filling material in the heater 11, that is, the heating temperature of the container 3 by the heater 11 as in the first to sixth embodiments, but the temperature of the container 3 is detected. It is also possible to use temperature detecting means for directly detecting. In addition, since the pressure detection means is for detecting the pressure of the vapor phase liquefied gas flowing out of the container 3, the gas pipeline 7 is used as in the first to sixth embodiments.
Instead of detecting the internal pressure, a pressure detecting means for detecting the pressure of the gas phase liquefied gas in the container 3 may be provided.

In the first to sixth embodiments, water is used as an example of the heat medium. However, the heat medium is not limited to water and various fluids can be used. Furthermore, the present invention can be applied to liquefied gas supply devices of various configurations, not limited to the configurations of the first to sixth embodiments, and is not limited to the micro gas turbine, and can be used for gas of a predetermined pressure or higher. The present invention can be applied to liquefied gas supply devices of various configurations for supplying vaporized liquefied gas to devices and devices that use liquefied gas in phase.

[0126]

According to the present invention, when the pressure in the container reaches a predetermined pressure or higher, the temperature of the gas in the container is kept from rising while suppressing the rise of the temperature and pressure in the container. It is possible to simplify the configuration of the liquefied gas supply device that prevents reliquefaction of the gas phase liquefied gas.

[Brief description of drawings]

FIG. 1 is a first liquefied gas supply device according to the present invention.
2 is a block diagram showing a schematic configuration and operation of the embodiment of FIG.

FIG. 2 is a first liquefied gas supply device to which the present invention is applied.
It is a figure which shows schematic structure and operation | movement of the heat source machine in embodiment of this.

FIG. 3 is a first liquefied gas supply device to which the present invention is applied.
3 is a block diagram showing a connection state and an operation of a control unit and each device in the embodiment of FIG.

FIG. 4 is a first liquefied gas supply device to which the present invention is applied.
FIG. 6 is a diagram for explaining on / off operations of the pressure switch and the temperature switch in the embodiment of FIG.

FIG. 5 is a first liquefied gas supply device to which the present invention is applied.
It is a flowchart which shows operation | movement of embodiment of FIG.

FIG. 6 is a second liquefied gas supply device to which the present invention is applied.
It is a flowchart which shows operation | movement of embodiment of FIG.

FIG. 7 is a third liquefied gas supply device to which the present invention is applied.
It is a flowchart which shows operation | movement of embodiment of FIG.

FIG. 8 is a fourth liquefied gas supply device to which the present invention is applied.
It is a flowchart which shows operation | movement of embodiment of FIG.

FIG. 9 is a fifth liquefied gas supply device to which the present invention is applied.
2 is a block diagram showing a schematic configuration and operation of the embodiment of FIG.

FIG. 10 is a block diagram showing a connection state and operation between a control unit and each device in a fifth embodiment of a liquefied gas supply device to which the present invention is applied.

FIG. 11 is a diagram showing a schematic configuration of a circuit included in a control unit in a fifth embodiment of a liquefied gas supply device to which the present invention is applied.

FIG. 12 is a diagram illustrating on / off operations of a pressure switch, a temperature switch, and a gas temperature switch in a fifth embodiment of a liquefied gas supply device to which the present invention is applied.

FIG. 13 is a flowchart showing the operation of the fifth embodiment of the liquefied gas supply device to which the present invention is applied.

FIG. 14 is a flowchart showing the operation of the sixth embodiment of the liquefied gas supply device to which the present invention is applied.

[Explanation of symbols]

1 Liquefied gas supply device 3 containers 5 Gas phase 7, 7a, 7b gas pipeline 9 Pressure switch 11 heater 13 Temperature switch 15 Heat source machine (built-in pump) 17a, 17b Heat transfer medium line 19 Control unit 95 cylinder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masanori Enomoto             23 Yashima Keiki Co., Ltd.             Inside the company F-term (reference) 3E072 AA03 DB03 GA30                 3H045 AA01 AA09 AA12 AA22 AA31                       BA03 BA07 CA24 DA01

Claims (6)

[Claims] 1. A container for containing a liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and a heating medium flowing in a flow passage provided in the liquefied gas heating means. A heat medium heating means, a heat medium conduit for guiding the heat medium from the heat medium heating means to the liquefied gas heating means, a pump for causing the heat medium to flow through the heat medium conduit, and Of a gas phase communicating with a gas phase part and a tubular body with both ends closed, which covers both of the parts of the heat medium conduit lined in close proximity to each other, and of the gas phase flowing into the container or the gas pipeline A pressure detection unit that detects the pressure of the liquefied gas and a control unit that controls the operation of the heating medium heating unit based on the pressure detected by the pressure detection unit are provided, and the control unit detects the pressure detection unit. When the applied pressure exceeds the set pressure, the heating medium heating means heats the heating medium. Stopped, it performs only the flow of the heating medium by the pump liquefied gas supply system. 2. A container for containing a liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and a heating medium flowing in a flow path provided in the liquefied gas heating means. A heat medium heating means, a heat medium conduit for guiding the heat medium from the heat medium heating means to the liquefied gas heating means, a pump for causing the heat medium to flow through the heat medium conduit, and Of a gas phase communicating with a gas phase part and a tubular body with both ends closed, which covers both of the parts of the heat medium conduit lined in close proximity to each other, and of the gas phase flowing into the container or the gas pipeline A pressure detection unit that detects the pressure of the liquefied gas and a control unit that controls the operation of the heating medium heating unit based on the pressure detected by the pressure detection unit are provided, and the control unit detects the pressure detection unit. Pressure is the first
When the pressure exceeds the set pressure, the heating capacity of the heat medium heating means is switched to lower the temperature of the heat medium heated by the heat medium heating means, and the pressure detected by the pressure detection means is the first pressure. When the second set pressure which is higher than the set pressure becomes equal to or higher than the second set pressure, the heating of the heating medium by the heating medium heating means is stopped,
A liquefied gas supply device in which only the flow of the heat medium is performed by the pump. 3. A container for containing a liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and a heating medium flowing in a flow passage provided in the liquefied gas heating means. A heat medium heating means, a heat medium conduit for guiding the heat medium from the heat medium heating means to the liquefied gas heating means, a pump for causing the heat medium to flow through the heat medium conduit, and Of a gas phase communicating with a gas phase part and a tubular body with both ends closed, which covers both of the parts of the heat medium conduit lined in close proximity to each other, and of the gas phase flowing into the container or the gas pipeline Pressure detection means for detecting the pressure of the liquefied gas, temperature detection means for detecting the temperature of the container or the heating temperature of the container by the heating means, pressure detected by the pressure detection means and the temperature detection means A control for controlling the operation of the heating medium heating means based on the temperature. A control unit, the control unit switches the heating capacity of the heat medium heating unit when the pressure detected by the pressure detection unit becomes equal to or higher than a set pressure, and the temperature of the heat medium heated by the heat medium heating unit. When the temperature detected by the temperature detecting means becomes equal to or higher than a set temperature, the heating of the heating medium by the heating medium heating means is stopped and only the flow of the heating medium by the pump is performed. Liquefied gas supply device. 4. A container for containing a liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and a heating medium flowing in a flow path provided in the liquefied gas heating means. A heat medium heating means, a heat medium conduit for guiding the heat medium from the heat medium heating means to the liquefied gas heating means, a pump for causing the heat medium to flow through the heat medium conduit, and Of a gas phase communicating with a gas phase part and a tubular body with both ends closed, which covers both of the parts of the heat medium conduit lined in close proximity to each other, and of the gas phase flowing into the container or the gas pipeline A pressure detection unit that detects the pressure of the liquefied gas and a control unit that controls the operation of the heating medium heating unit based on the pressure detected by the pressure detection unit are provided, and the control unit detects the pressure detection unit. When the applied pressure exceeds the set pressure, the heating capacity of the heating medium heating means is switched. To lower the temperature of the heating medium heated by the heating medium heating unit Te, the temperature of the heating medium that rot low is 20 ° C. or higher 3
A liquefied gas supply device having a temperature of 5 ° C. or lower. 5. A container for containing a liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and a heating medium flowing in a flow path provided in the liquefied gas heating means. A heat medium heating means, a heat medium conduit for guiding the heat medium from the heat medium heating means to the liquefied gas heating means, a pump for causing the heat medium to flow through the heat medium conduit, and Of a gas phase communicating with a gas phase part and a tubular body with both ends closed, which covers both of the parts of the heat medium conduit lined in close proximity to each other, and of the gas phase flowing into the container or the gas pipeline Based on pressure detection means for detecting the pressure of the liquefied gas, gas temperature detection means for detecting the temperature of the liquefied gas in the gas pipeline, pressure detected by the pressure detection means and temperature detected by the gas temperature detection means And a control unit that controls the operation of the heating medium heating unit. When the pressure detected by the pressure detection unit is equal to or higher than a set pressure, the heating unit heats the heat medium by the heat medium heating unit if the temperature detected by the gas temperature detection unit is equal to or lower than a first set temperature. A liquefied gas supply device that is configured to drive the pump and stop the driving of the pump at least when the temperature detected by the gas temperature detection unit is equal to or higher than a second preset temperature higher than the first preset temperature. 6. A container for containing a liquefied gas, a liquefied gas heating means for heating the liquefied gas in the container, and a heating medium flowing in a flow path provided in the liquefied gas heating means. A heat medium heating means, a heat medium conduit for guiding the heat medium from the heat medium heating means to the liquefied gas heating means, a pump for causing the heat medium to flow through the heat medium conduit, and Of a gas phase communicating with a gas phase part and a tubular body with both ends closed, which covers both of the parts of the heat medium conduit lined in close proximity to each other, and of the gas phase flowing into the container or the gas pipeline Based on pressure detection means for detecting the pressure of the liquefied gas, gas temperature detection means for detecting the temperature of the liquefied gas in the gas pipeline, pressure detected by the pressure detection means and temperature detected by the gas temperature detection means And a control unit that controls the operation of the heating medium heating unit. The section switches the heating capacity of the heating medium heating means when the temperature detected by the gas temperature detection means is equal to or lower than a first set temperature when the pressure detected by the pressure detection means becomes equal to or higher than a set pressure. When the temperature of the heat medium heated by the heat medium heating means is lowered and the temperature detected by the gas temperature detecting means becomes equal to or higher than a second preset temperature higher than the first preset temperature, at least the pump is driven. A liquefied gas supply device that is stopped.