JPH08278065A - Absorption type cold heat generator - Google Patents

Abstract

PURPOSE: To detect reliably an upper bound position or a lower bound position of ice portions of an ice slurry by a method wherein oscillation type liquid level meters for detecting an upper bound position and a lower bound position of ice portions of an ice slurry are disposed in a cold heat tank. CONSTITUTION: When cold heat is generated, an absorption cycle is actuated. In such an absorption cycle, water flowing through a heat transfer pipe 1a in an evaporator 1 is cooled, and a temperature of the cold water thus cooled is rapidly lowered to produce ice. As a result, the cold water in a cold heat tank 6 turns into an ice slurry A including ice. When a predetermined amount of the ice slurry A is stored in the tank i.e., when the ice portions of the ice slurry A are detected by both level meters of a first and a second oscillation type level meters 7, 8, both detection signals are sent to a controller 11, whereby it is judged that a predetermined amount of the ice slurry A has been stored. Thereupon, an OFF signal is outputted from the controller 11 into a controller 12 for a heating burner 3, and the actuation of the absorption cycle is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type cold heat generator.

[0002]

2. Description of the Related Art There is an absorption type cold heat generating device for generating cold water, but in order to improve its thermal efficiency,
It has been considered that ice slurry is stored in a cold heat storage tank for storing cold water so that the cold heat of the ice slurry can be taken out as necessary.

In this case, it is necessary to detect the amount of ice slurry stored in the cold heat tank. Conventionally, float switches and capacitance level meters have been used to detect the liquid level in the tank. , Ultrasonic type liquid level gauge.

[0004]

However, in the case of the above liquid level gauge, for example, the float switch, there is a drawback that the float freezes, and in the case of the ultrasonic type liquid level gauge, It has a drawback that it is expensive, and in the case of a capacitance level meter, it has a drawback that the surface of ice cannot be accurately detected.

Therefore, an object of the present invention is to provide an absorption type cold heat generating device which can solve the above problems.

[0006]

In order to solve the above problems, the first means of the present invention is an evaporator, an absorber, a regenerator,
In an absorption type cold heat generator having a condenser and a cold heat tank for storing cold water, absorption cold heat generation in which a vibrating liquid level gauge for detecting the upper limit position and the lower limit position of the ice portion of the ice slurry is arranged in the cold heat tank. It is a device.

In order to solve the above problems, a second means of the present invention is an absorption type cold heat generating device having an evaporator, an absorber, a regenerator, a condenser and a cold heat tank for storing cold water. In the tank, a vibrating liquid level gauge that detects the upper and lower limit positions of the ice portion of the ice slurry is placed,
It is an absorption type cold heat generating device provided with a control device for inputting detection signals from these vibration level gauges and controlling a controller of a heating burner in the regenerator.

[0008]

According to each of the above configurations, since the vibration type level meter is used as the level meter for detecting the upper and lower limit positions of the ice portion of the ice slurry in the cold heat tank, the upper limit of the ice portion of the ice slurry or The lower limit position can be reliably detected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the absorption type cold heat generator of the present invention will be described below with reference to FIG. The absorption type cold heat generator according to the present embodiment includes an evaporator 1 that evaporates a refrigerant liquid, an absorber 2 that absorbs the refrigerant vapor evaporated in the evaporator 1 into an absorption liquid, and a refrigerant vapor in the absorber 2. It is composed of a regenerator 4 for absorbing and diluting a dilute absorption liquid having a low concentration and heating it by a heater, for example, a heating burner 3, and a condenser 5 for guiding and condensing the refrigerant vapor heated and separated by the regenerator 4. In addition, a cold heat tank 6 for storing a fluid to be cooled, that is, cold water flowing in the heat transfer tube 1a provided in the evaporator 1 is provided. The state of cold water in the cold heat tank 6 is ice slurry A in which ice is mixed with cold water.

At the middle portion of the side wall of the cold heat tank 6, the first and second ice slurry A, particularly the upper and lower limit positions of the ice portion and the minimum storage amount of the ice slurry A are detected. Vibration level meters 7, 8 and 3rd
A vibration level meter 9 is provided.

Each of these vibration level meters 7 to 9 is provided with a rod portion 7a, 8a, 9a projecting into the cold heat tank 6, respectively. The rod portions 7a to 9a continue to vibrate at their natural frequencies due to the vibrating element, and when the vibrating rod portions 7a to 9a come into contact with the measured object, that is, the ice portion which is a solid substance of the ice slurry. Vibration amplitude is reduced. Then, this decrease in the vibration amplitude is electronically detected, and this detection signal is sent to the control device 11, which outputs the control signal to the control device 12 of the heating burner 3 of the regenerator 4.

Of course, the inside of the cold heat tank 6 and the heat transfer pipe 1a of the evaporator 1 are connected by a cold water transfer pipe 13, and the ice slurry stored in the cold heat tank 6, that is, cold heat can be used as an external cold heat source. Further, a cold water pipe 15 for transferring cold water in the cold heat tank 6 is provided between the cold heat tank 6 and the heat transfer pipe 14a on the heat exchanger 14 for supplying the external cold heat source.

A refrigerant vapor transfer pipe 21 is provided between the evaporator 1 and the absorber 2, and a rare absorption liquid transfer pipe 22 is provided between the absorber 2 and the regenerator 4. A refrigerant vapor transfer pipe 23 is provided between the condenser 4 and the condenser 5.
A refrigerant liquid transfer pipe 24 is provided between the regenerator 4 and the absorber 2, and a concentrated absorbent transfer pipe 25 is provided between the regenerator 4 and the absorber 2. Although not shown, a low temperature fluid for driving heat source is supplied to at least the absorber 2, the condenser 5 and the like, and also between the rare absorbent transfer pipe 22 and the concentrated absorbent transfer pipe 25. , A heat exchanger for heat recovery is provided. Further, in FIG. 1, the symbol P indicates a pump.

In the above structure, when generating cold heat, the absorption cycle is activated. That is, the refrigerant vapor generated in the evaporator 1 is absorbed by the absorbing liquid in the absorber 2, and then the rare absorbing liquid from the absorber 2 is guided to the regenerator 4 and heated by the heating burner 3 where it is heated. The separated refrigerant vapor is sent to the condenser 5 and condensed. The condensed refrigerant liquid is again supplied to the evaporator 1, and the concentrated absorption liquid regenerated by the regenerator 4 is returned to the absorber 2 and circulated.

In such an absorption cycle, the water flowing in the heat transfer tube 1a of the evaporator 1 is cooled, and the temperature of the cooled cold water is gradually lowered to generate ice, so that the cold water in the cold heat tank 6 is , Becomes ice slurry A containing ice.

When the ice slurry A is stored in a predetermined amount, that is, when the ice portion of the ice slurry A is detected by both the first and second vibrating level meters 7 and 8, both of them are detected. A signal is sent to the control device 11, where it is judged that the ice slurry A has been stored in a predetermined amount, and then an off signal is output to the controller 12 of the heating burner 3 to stop the operation of the absorption cycle. .

Further, by the use (demand) of the external cold heat source,
When the storage amount of the ice slurry A in the cold heat tank 6 decreases and the ice portion of the ice slurry A is no longer detected by the third vibrating level meter 9, the controller 11 decreases the ice slurry A. If it is determined that the heating burner 3 is present, the controller 11 outputs the ON signal to the controller 12 of the heating burner 3 again. Of course, at this time, the ON signal is output to other necessary devices.

As described above, since the cold heat tank 6 is provided with the vibration type level meters 7 to 9, it is possible to reliably detect the storage amount of the ice slurry A, particularly the ice portion thereof with an inexpensive instrument.

In the above embodiment, three vibrating level gauges are provided for detecting the upper limit position, the lower limit position and the minimum storage amount of the ice slurry. By finely detecting the amount, it is possible to finely control the heating burner and other devices.

[0020]

As described above, according to each constitution of the present invention,
Since the vibration level meter was used as the level meter for detecting the upper and lower limit positions of the ice slurry in the cold heat tank,
It is possible to reliably detect the upper and lower limit positions of the ice portion in the ice slurry, so that the absorption cold heat generator can store cold heat without any trouble.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an absorption type cold heat generating device in an embodiment of the present invention.

[Explanation of symbols]

 1 Evaporator 1a Heat transfer tube 2 Absorber 3 Heating burner 4 Regenerator 5 Condenser 6 Cold heat tank 7-9 Vibration level meter 11 Controller 12 Controller 13 Cold water transfer pipe 14 Heat exchanger for supplying external heat source 15 Cold water piping

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuhisa Kira, 5-3 28 Nishikujo, Konohana-ku, Osaka-shi, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Yu Fujita, 5-ku, Nishikujo, Konohana-ku, Osaka 3-28 Hitachi Shipbuilding Co., Ltd. (72) Inventor Tatsuhiko Umeda Nishikujo 5-chome, Nishikojo, Konohana-ku, Osaka-shi, Osaka Prefecture 3-28 Hitachi Shipbuilding Co., Ltd. 5th-328th Hitachi Shipbuilding Co., Ltd.

Claims (2)

[Claims] 1. An absorption type cold heat generating device having an evaporator, an absorber, a regenerator, a condenser and a cold heat tank for storing cold water, wherein an upper limit position and a lower limit position of an ice portion in an ice slurry are provided in the cold heat tank. An absorption-type cold heat generator characterized in that a vibration level gauge for detection is arranged. 2. An absorption type cold heat generating device having an evaporator, an absorber, a regenerator, a condenser and a cold heat tank for storing cold water, wherein an upper limit position and a lower limit position of an ice portion in an ice slurry are provided in the cold heat tank. Absorption cold heat characterized by arranging vibration level gauges for detection, inputting detection signals from these vibration level gauges, and providing a control device for controlling the controller of the heating burner in the regenerator. Generator.