JP2820818B2 - Ice heat storage device temperature measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring device for an ice heat storage device used in an air conditioning system or the like.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram of a conventional ice heat storage device disclosed in, for example, JP-A-64-90973. In FIG. 2, reference numeral 1 denotes a heat storage tank for storing a solid-liquid mixed-phase sherbet-like ice water; A supercooler as a supercooling mechanism 2 for supercooling water in the heat storage tank 1 to a low temperature below the freezing point, a refrigerator 2b as a supercooling mechanism 2 for creating a low temperature state of the supercooler 2a,
Reference numeral 3 denotes a supercooling water outlet pipe which is an outlet of the supercooling water supercooled by the supercooler 2a. 4 denotes a supercooling water outlet pipe 3 for detecting the temperature of the supercooling water, which is provided with a temperature detection end inserted therein. Temperature measurement device.

Reference numeral 5 denotes a circulation pump for sending only cold water out of the sherbet-like ice water in the heat storage tank 1 to the supercooler 2a, reference numeral 6 denotes a pipe for guiding cold water from the heat storage tank to the supercooler 2a via the circulation pump 5, and reference numeral 7 denotes a pipe. A supercooling release mechanism for releasing the state of the supercooled water and changing the state to the sherbet-like ice water, and discharging the sherbet-like icewater to the heat storage tank. And a piezoelectric element 7b mounted in the gutter 7a to release the state of the supercooled water by generating ultrasonic vibration, and a power supply 7c for the piezoelectric element 7b.

[0004] Reference numeral 8 denotes a control unit for controlling the circulating pump 5 and the subcooling mechanism 2 based on a measurement signal obtained from the temperature measuring device 4 of the supercooled water.
And a supercooling mechanism controller 8b. 10 is an air-conditioning load for cooling such as an air handling unit, and 11
Is a pipe for guiding the cold stored in the heat storage tank to the air conditioning load 10 as cold water, 12 is a pipe for returning heated water heated from the air conditioning load 10, and 13 is for distributing the heated water guided by the pipe 12 to the heat storage tank 1. This is the header.

The following operation will be described. The water in the heat storage tank 1 is sent to the supercooler 2 a by the circulation pump 5 via the pipe 6, and returns to the heat storage tank 1 via the supercooled water outlet pipe 3 which is supercooled by the second person. The temperature measuring device 4 installed with the temperature detecting end inserted in the supercooling water outlet pipe 3 measures the water temperature at the outlet of the supercooler 2a and sends the measurement signal to the circulating pump controller 8a and the supercooling mechanism controller 8b. To control the water temperature by controlling a device (not shown) for stopping the supercooling mechanism or controlling the circulation pump 5 and the supercooling mechanism 2.

During the repetition of this cycle, the water temperature gradually decreases and becomes water at 0 ° C. or lower, that is, supercooled water, at the outlet of the supercooler 2a. The supercooled water is supplied from the supercooled water outlet pipe 3 to the gutter 7
a, the supercooled water is released by the ultrasonic vibration generated by the piezoelectric element 7b, and becomes a solid-liquid mixed-phase sherbet-like ice. The mixed fluid of ice and water in the shape of the sharppet overflows the gutter 7a and returns to the heat storage tank 1.

Since the supercooled water is in a metastable state,
In order to maintain the state of the supercooled water in the supercooled water outlet pipe 3, certain conditions such as a small temperature range and no mechanical or thermal shock are required. However, it is necessary to control the temperature in a turbulent state and stably control the temperature.

By repeating this cooling cycle while accurately detecting and stably controlling the outlet temperature of the supercooled water, sherbet-like ice components increase in the heat storage tank 1, and the cooling heat is transferred to the heat capacity. Can be stored with large latent heat. The stored heat is used every time the cold water is guided to the air conditioning load 10 by the circulation pump 5.

[0009]

The conventional ice heat storage device is configured as described above, and the supercooled water is in a metastable state. The installation will apply a mechanical shock to the supercooled water to release the supercooled water state, causing freezing in the supercooled water outlet pipe 3 and the ice generated by the iron will become crystal nuclei. Therefore, there is a problem that the supercooled water in the supercooler 2a is frozen. In addition, the method of indirectly detecting the temperature of the supercooled water by attaching a warm skin detector to the outer wall of the supercooled water outlet pipe is limited because the detection of the change in the water temperature involves a time delay or the temperature detection accuracy is deteriorated. There is a problem that the state of the supercooled water cannot be maintained in the temperature range.

The present invention has been made in order to solve the above-described problems, and the temperature of the supercooled water is reliably detected, and the supercooler 2a and the supercooled water outlet pipe 3 are not frozen. Another object of the present invention is to obtain a temperature measuring device for an ice heat storage device.

[0011]

According to a first aspect of the present invention, there is provided a temperature measuring device for an ice heat storage device, which detects a temperature of supercooled water in a non-contact state with supercooled water discharged from a supercooled outlet pipe. A temperature measuring device is provided.

[0012]

The temperature measuring device of the ice heat storage device according to the first aspect of the present invention detects the temperature of the supercooled water in a non-contact state with the supercooled water discharged from the supercooled outlet pipe,
The temperature of the supercooled water is detected with good accuracy and sensitivity without affecting the flow of water.

[0013]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. In the figure, the same reference numerals are given to the same components as those shown in FIG. 2 which is the related art, and the redundant description thereof will be omitted.
In FIG. 1, reference numeral 14 denotes an infrared detection type temperature measuring device (temperature measuring device) installed in a non-contact state with the supercooled water discharged from the supercooled outlet pipe 3.

The water in the heat storage tank 1 is sent to the subcooler 2a by the circulation pump 5 and cooled. While repeating this cycle, the chilled water is brought into a state of supercooled water of 0 ° C. or less by the supercooler 2a.

On the other hand, the infrared detecting type temperature measuring device 14 does not change the temperature of the supercooled water discharged from the supercooled water outlet pipe 3 in a non-contact state to the state of the flow of the supercooled water (ie, a mechanical obstacle). ) Is detected without giving). Based on the detected temperature signal, a device (not shown) for stopping the subcooling mechanism is operated via the circulation pump controller 8a and the subcooling mechanism controller 8b, and the flow rate of the circulation pump 5 and the subcooling mechanism are controlled. By performing the control of 2, the state of the supercooled water is stably maintained, and it is possible to continuously generate a solid-liquid mixed phase shearpet-like ice.

[0016]

As described above, according to the first aspect of the present invention, the temperature measuring device of the ice heat storage device is used to measure the temperature of the supercooled water in a state of non-contact with the supercooled water discharged from the supercooled outlet pipe. Since it is configured to detect, the state of the supercooled water, which is a metastable state, is released by a mechanical shock at the temperature detecting end, and there is an effect that the piping is not frozen.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an ice heat storage device showing one embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional ice heat storage device.

[Explanation of symbols]

1 storage tank, 14 an infrared detection system temperature measuring device (temperature measuring device).

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masakatsu Yuki 6-14 Maruo-cho, Nagasaki-shi, Nagasaki Works, Mitsubishi Electric Corporation (56) References JP-A-2-97872 (JP, A) JP-A Sho 63-111901 (JP, A) JP-A-4-227447 (JP, A) JP-A-2-85253 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 5/00 102

Claims (1)

(57) [Claims] 1. A supercooling mechanism for cooling water in a heat storage tank into supercooled water which is water below a freezing point, and releasing supercooled water discharged from a supercooled outlet pipe of the supercooled mechanism. A supercooling release mechanism that generates a solid-liquid mixed-phase sherpet-like ice water by storing the sherbet-like ice water in the heat storage tank, A temperature measuring device for an ice heat storage device, comprising: a temperature measuring device that detects a temperature of supercooled water; and an adjusting unit that controls the supercooling mechanism based on the temperature detected by the temperature measuring device.