JPH09318223A - Control circuit and control method of heat storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate supercooling and enable the sufficient cooling of a cold trap even at the time of the peak of cooling by a method wherein a heat radiating operation circuit is provided with a temperature detector to restrain the flow of brine into a heat storage tank in accordance with the transfer of temperature of the brine to a predetermined temperature. SOLUTION: A temperature detector 18 is provided at the downstream side of brine in a heat storage tank 6 for the heat radiating operation circuit 17 of a brine pipeline 15 while a bypass circuit 19, connecting the upstream side of the brine in the heat storage tank 6 to the downstream side of the same, is provided with a direction switching valve 20 at the branching point to the heat storage tank 6. In the daytime precooling operation, brine, circulating and flowing through the heat radiating operation circuit 17, cools water vapor in a cold trap 2 and drain the same as water drops. When a brine temperature, detected by the temperature detector 18, has become lower than a set temperature, the direction of heat storage tank 6 of the direction switching valve 20 in the bypass circuit 19 is closed and the direction of bypass circuit of the same valve is opened to conduct the brine into the cold trap 2 so that the brine flows therethrough. When a brine temperature is raised, the brine is conducted into the heat storage tank 6 so that the brine flows thereinto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit for a heat storage device that stores heat using nighttime power and a control method thereof.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show a conventional heat storage device. In the figure, a vacuum pump 8 for vacuuming a vacuum tank 1 for vacuum cooling an object to be cooled such as vegetables, a cold trap 2 for condensing water vapor evaporated from vegetables into water drops,
A brine cooler unit 4, which cools the brine circulating through the cold trap, and a brine circulation pump 10
11, a compressor 3 for Freon refrigerant circulating in the brine cooler unit, a condenser 5, a brine cooler unit 4, and a heat storage tank 6 connected between the vacuum tank cold trap 2 are connected by a brine pipe 9. is set up.
The heat storage tank 6 includes, for example, a nodule 6a in which a cold storage agent is filled in a spherical plastic capsule in a cylindrical tank.
Are packed.

Next, there is a pre-cooling method of cooling the product temperature to near the freezing point as a method of suppressing the respiratory action in order to keep the freshness of the harvested vegetables long. When vegetables are stored and sealed in the vacuum tank 1 and evacuated by the vacuum pump 8, the water content of the vegetables evaporates and the vegetables are cooled to about 4 ° C. by the latent heat of vaporization. When the evaporated water becomes a gas, the vacuum pressure is 6 m.
At mHg, the volume is 2.2 million times that at atmospheric pressure, and exhausting is technically difficult.
The water vapor in the air exhausted from the vacuum chamber 1 and passing therethrough is cooled to about 0 ° C., is converted into water and is drained, and only the air is exhausted by the vacuum pump 8.

Next, the operation will be described. Refrigerant circulates through compressor 3-condenser 5-expansion valve (not shown) -brine cooler 4-compressor 3 using nighttime power. At the same time, the brine circulates and flows between the heat storage tank 6-the brine cooler 4-the heat storage tank 6 by the brine circulation pump B: 11 provided in the brine pipe 9, and the brine cooler 4 exchanges heat with the refrigerant. Is cooled by cooling, and the nodule cool storage agent 6a in the heat storage tank 6 is cooled and frozen to store cold heat.

Next, during the daytime precooling work, brine is supplied to the brine pipe 9 and the brine circulation pump A: 10 is used.
By this, the heat storage tank 6-cold trap 2-flows in circulation with the heat storage tank 6, and the brine cooled by the latent heat of melting of the frozen nodule cool storage agent 6a in the heat storage tank 6 is flowed to the cold trap 2 and evaporated from the vegetables. The brine, which has undergone heat exchange with the above-mentioned steam and is discharged as water droplets and whose temperature has risen, is cooled again in the heat storage tank 6 in the same manner as above.

A structure similar to this conventional device is as follows.
It is also disclosed in Japanese Patent Application Laid-Open Nos. 4-23949 and 7-102.

[0007]

Since the conventional heat storage device is configured as described above, the amount of evaporated water from vegetables is small, the amount of heat exchange in the cold trap is small, and the brine that does not heat up too much is used to store heat. Heat loss such as further cooling in the tank occurs, and it takes time to cool and freeze the nodule regenerator in the heat storage tank at the peak of the harvest time, and the cooling temperature of the brine flowing in the cold trap is not sufficient. There was a point.

The present invention has been made in order to solve the above problems, and provides a control circuit for a heat storage device which does not supercool the brine and can sufficiently cool the cold trap even at the peak cooling time. It is an object of the present invention to provide a control method suitable for this device.

The first aspect of the present invention detects the temperature of the heat radiation operation circuit and controls the flow of the brine to the heat storage tank so that the brine is not overcooled and the cold trap can be sufficiently cooled even at the peak cooling time. It is intended to obtain the control circuit of.

In a second aspect of the invention, the temperature of the heat storage tank downstream side in the heat radiation operation circuit is detected to control the flow of brine to the heat storage tank so that the brine is not overcooled and the cold trap is cooled even at the peak cooling time. It is intended to obtain a control circuit of the heat storage device which can be sufficiently performed.

A third aspect of the present invention detects the temperature on the upstream side of the heat storage tank in the heat radiation operation circuit and controls the flow of the brine to the heat storage tank so that the brine is not overcooled and the cold trap is cooled even at the peak cooling time. It is intended to obtain a control circuit of the heat storage device which can be sufficiently performed.

A fourth aspect of the present invention is a heat storage system which detects the temperature of a heat radiation operation circuit and bypass-controls the flow of brine to a heat storage tank so that the brine is not overcooled and the cold trap can be sufficiently cooled even during a peak cooling time. It is intended to obtain a control circuit for the device.

A fifth aspect of the present invention detects the temperature of the heat radiation operation circuit and controls the flow of brine to the heat storage tank by bypass flow rate,
It is an object of the present invention to obtain a control circuit of a heat storage device that can sufficiently cool a cold trap even at the peak of cooling without supercooling of brine.

A sixth aspect of the present invention is to obtain a control circuit of a heat storage device which controls the supply of cold brine so that the brine is not excessively cooled and the cold trap can be sufficiently cooled even at the peak of cooling. .

According to a seventh aspect of the present invention, the temperatures of the bypass circuit branch point and the junction point of the heat radiation operation circuit are detected to control the bypass flow rate of the flow of brine to the heat storage tank so that there is no supercooling of the brine and peak cooling occurs. However, it is intended to obtain a control circuit of a heat storage device capable of sufficiently cooling the cold trap.

An eighth aspect of the present invention is to obtain a control circuit of a heat storage device which controls the split flow of cold brine so as not to overcool the brine and to sufficiently cool the cold trap even at the peak of cooling. .

A ninth aspect of the present invention is to obtain a control circuit of a heat storage device that controls the return of brine so that the brine is not overcooled and the cold trap can be sufficiently cooled even at the peak of cooling.

A tenth aspect of the present invention suppresses wasteful heat dissipation of the heat storage tank by detecting the temperature of the heat dissipation operation circuit and controlling the flow of brine to the heat storage tank to reuse the return brine having a cooling capacity. Therefore, the present invention is intended to obtain a control method capable of achieving energy saving.

An eleventh aspect of the present invention detects wasteful heat dissipation from the heat storage tank by detecting the temperature of the heat dissipation operation circuit and by-passing the circulation of the brine to the heat storage tank to reuse the return brine having a cooling capacity. It is intended to obtain a control method that can suppress the energy consumption.

The twelfth aspect of the present invention detects wasteful heat dissipation from the heat storage tank by detecting the temperature of the heat dissipation operation circuit and controlling bypass flow of brine to the heat storage tank to reuse the return brine having a cooling capacity. It is intended to obtain a control method capable of suppressing the above and saving energy.

A thirteenth aspect of the present invention suppresses wasteful heat dissipation from the heat storage tank by detecting the temperature of the heat dissipation operation circuit and controlling the flow of brine to the heat storage tank to reuse the return brine having a cooling capacity. Therefore, it is intended to obtain a control method capable of keeping the cold brine supply temperature constant in order to control the flow rate of the return brine while achieving energy saving.

In the fourteenth aspect of the invention, when the load increases, the cold brine of the heat storage operation circuit is directly used for the cold trap without passing through the heat storage tank, so that the thermal efficiency is improved and the cooling capacity is also lowered. Since it does not, it seeks to obtain a control method that can handle the load.

The fifteenth aspect of the present invention controls waste heat in the heat storage tank by controlling the amount of heat by detecting the cold brine supply temperature, the brine return temperature and the bypass flow rate and reusing the return brine having a cooling capacity. It is an object of the present invention to obtain a control method that can suppress the energy consumption, save energy, and keep the cold brine supply temperature constant for controlling the amount of heat.

The sixteenth aspect of the present invention controls waste heat in the heat storage tank by controlling the heat quantity by detecting the cold brine supply temperature, the brine return temperature and the bypass flow rate and reusing the return brine having a cooling capacity. It is possible to suppress and save energy, and moreover, because of the return brine flow rate and heat quantity control, the cold brine supply temperature can be kept constant, and when the load increases, the heat storage operation circuit cools down. By directly utilizing the brine for the cold trap without passing through the heat storage tank, the thermal efficiency is improved and the cooling capacity is not lowered, so that a control method that can cope with the load is to be obtained.

[0025]

In a control circuit for a heat storage device according to a first aspect of the invention, in a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, a temperature detection device for detecting the temperature of brine is provided in the heat dissipation operation circuit. It is characterized in that it is provided to suppress the flow of the brine to the heat storage tank according to the transition of the temperature of the brine to a predetermined temperature.

In the control circuit of the heat storage device of the second invention, in the heat storage device having the heat storage operation circuit and the heat dissipation operation circuit, a temperature detection device is provided downstream of the heat dissipation tank of the heat dissipation operation circuit. It is a thing.

In the control circuit of the heat storage device of the third invention, in the heat storage device having the heat storage operation circuit and the heat dissipation operation circuit, a temperature detecting device is provided upstream of the heat dissipation tank of the heat dissipation operation circuit. It is a thing.

In the control circuit of the heat storage device of the fourth invention, in the heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the heat dissipation operation circuit is provided with a bypass circuit of the heat storage tank, and the direction is switched to the bypass circuit branch point. It is characterized by having a valve.

In the control circuit of the heat storage device of the fifth invention, in the heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, a bypass circuit of a heat storage tank is provided in the heat dissipation operation circuit, and a flow control valve is provided in this bypass circuit. It is characterized by being provided.

In the control circuit of the heat storage device of the sixth invention, in the heat storage device having the heat storage operation circuit and the heat dissipation operation circuit, the heat storage tank upstream side of the heat storage operation circuit and the brine circulation pump downstream side of the heat dissipation operation circuit are connected. The present invention is characterized in that the first electromagnetic on-off valve is provided in the heat storage operation circuit between the branch point of the cold brine supply circuit having the second electromagnetic on-off valve and connected and the heat storage tank.

In the control circuit of the heat storage device of the seventh invention, in the heat storage device having the heat storage operation circuit and the heat dissipation operation circuit, the heat dissipation operation circuit is provided with a bypass circuit of the heat storage tank having the flow rate adjusting valve. It is characterized in that a first temperature detector is provided on the upstream side of the branch point, and a second temperature detector is provided between the heat storage tank and the bypass circuit merging point.

In the control circuit of the heat storage device of the eighth invention, in the heat storage device having the heat storage operation circuit and the heat dissipation operation circuit, a heat storage tank upstream side of the heat storage operation circuit and a brine circulation pump downstream side of the heat dissipation operation circuit are connected to each other. A cold brine supply circuit having a flow rate adjusting valve and a temperature detection device of No. 1 is connected, a first branch valve is provided at a branch point between the cold brine supply circuit and the heat storage tank, and a second heat radiation operation circuit is provided. A heat storage tank bypass circuit having a flow rate adjusting valve is provided, and a second flow dividing valve is provided at a branch point between the bypass circuit and the heat storage tank.

The ninth aspect of the invention is characterized in that a brine return circuit for connecting the downstream side of the cold trap of the heat radiation operation circuit and the upstream side of the brine circulation pump of the heat storage operation circuit is provided.

In the control method according to the tenth aspect of the invention, in a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the temperature of the brine in the heat dissipation operation circuit is detected, and the temperature of the brine is changed to a predetermined temperature in accordance with the detected temperature. It is characterized by suppressing the flow of brine to the heat storage tank.

In the control method of the eleventh aspect of the invention, in a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the temperature of the brine of the heat dissipation operation circuit is detected, and the temperature of the brine is changed to a predetermined temperature. The bypass operation for suppressing the flow of brine to the heat storage tank is performed.

In the control method according to the twelfth aspect of the invention, in a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the temperature of the brine in the heat dissipation operation circuit is detected, and the temperature of the brine is changed to a predetermined temperature. The bypass operation for suppressing the flow of the brine to the heat storage tank is performed, and the bypass flow rate of the brine is adjusted.

In the control method of the thirteenth invention, in a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, a cold heat temperature detecting step provided in the heat dissipation operation circuit and a comparison judgment of the detected cold heat temperature with a set value. Temperature comparison step, and a cold heat distribution step of dividing the cold heat quantity into a bypass circuit and a heat storage tank based on the temperature comparison determination result, and a temperature mixing step of combining uncooled brine and cooled brine by this cold heat quantity distribution step. By the process, temperature-adjusted brine is supplied.

In the control method of the fourteenth invention, in a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the supply of cold brine to the heat storage tank is stopped by closing the first electromagnetic on-off valve provided in the heat storage circuit. The cold brine is directly supplied to the cold trap by the process and the opening operation of the second electromagnetic opening / closing valve of the cold brine supply circuit that connects the heat storage operation circuit and the heat radiation operation circuit.

In the control method of the fifteenth invention, in the heat storage device having the heat storage operation circuit and the heat dissipation operation circuit, the return brine temperature detecting step A provided in the heat dissipation operation circuit is performed.
According to the detected cooling temperature determination result, a non-cooling step in which a part of the return brine is diverted to a bypass circuit,
The remaining brine is cooled in a heat storage tank, and the cooled brine temperature detecting step B and the brine temperature detecting step A.
A temperature adjusting step of adjusting the brine temperature and the flow rate detected in B by performing a sum operation, and the divided brine are merged and supplied at a constant temperature value.

In the control method of the sixteenth invention, in a heat storage device having a heat storage operation circuit and a heat radiation operation circuit, a predetermined amount of cold brine is distributed to the heat storage tank by a first flow dividing valve provided in the heat storage operation circuit. A step of supplying a predetermined amount of cold brine by the first flow rate adjusting valve of the cold brine supply circuit that connects to the heat radiation operation circuit of the heat storage operation circuit, and a predetermined amount of return brine by the second flow rate adjustment valve of the bypass circuit of the heat radiation operation circuit The brine is supplied while being kept at a constant temperature by a supply step and a temperature adjusting step in which the cold brine and the return brine are combined and the temperature of the combined brine is detected to operate the flow rate adjusting valve.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 1 is a vacuum tank for vacuum-cooling an object to be cooled such as vegetables, 2 is a cold trap that condenses water vapor evaporated from vegetables into water droplets, and 4 is brine that cools brine circulating in the cold trap 2. A cooler unit, 3 is a compressor for Freon refrigerant circulating in the brine cooler unit 4, 5 is a condenser, 6 is a heat storage tank connected between the brine cooler unit 4 and the vacuum tank cold trap 2, and 8 Is a vacuum pump for evacuating the vacuum tank 1, 9 is a brine pipe, and 10 and 11 are brine circulation pumps. The heat storage tank 6 is filled with a large number of nodules 6a, which are, for example, a spherical tank filled with a cold storage agent in a spherical plastic capsule.

Reference numeral 15 denotes a brine pipe, which is a heat storage tank 6-a brine circulation pump B: 11-a brine cooler 4-a heat storage operation circuit 16 circulating with the heat storage tank 6, a heat storage tank 6-a brine circulation pump A: 10-a cold trap. 2-The heat storage tank 6 and the heat radiation operation circuit 17 which circulates.

Reference numeral 18 is a temperature detector provided on the downstream side of the heat storage tank 6 in the heat dissipation tank 6 of the heat radiation operation circuit 17. Reference numeral 19 is a bypass circuit connecting the upstream and downstream sides of the heat storage tank 6 with the brine. A directional control valve 20, which is a three-way valve, is provided at a branch point with respect to 6. The other configurations are the same as the conventional ones.

Next, the operation will be described. In the same manner as in the conventional case, the brine flowing through the heat storage operation circuit 16 of the brine pipe 15 is cooled by the brine cooler 4 by the night power, and the cold heat thereof cools the nodule cool storage agent 6a of the heat storage tank 6.
To freeze and store heat.

Next, during the daytime precooling work, the brine that circulates in the heat radiation operation circuit 17 cools the water vapor evaporated from the vegetables in the cold trap 2 and discharges it as water drops. At this time, the amount of water vapor evaporated from the vegetables is gradually reduced by the pre-cooling work, the amount of heat exchange with the brine is also reduced, and the amount of temperature rise of the brine is also small.

As described above, even if the brine still having a cooling capacity is further cooled in the heat storage tank 6 and sent to the cold trap 2 having a small heat exchange amount, the effect is not so great, so the heat storage tank 6
When the temperature of the brine is detected by the temperature detector 18 provided on the downstream side of the temperature sensor, and the temperature becomes equal to or lower than the set temperature value, the directional switching valve 20 of the bypass circuit 19 is commanded to operate and the direction of the heat storage tank 6 is closed. Is opened, and brine is allowed to flow into the cold trap 2 as it is. When the temperature of the brine rises, the temperature detector 18 detects and causes the direction switching valve 20 to operate, so that the brine flows into the heat storage tank 6.

According to the first embodiment, waste cooling of the heat storage tank 6 can be suppressed by reusing the return brine having a cooling capacity by detecting the cold brine supply temperature, thereby saving energy. be able to.

Embodiment 2 Hereinafter, another embodiment of the present invention will be described with reference to FIG. In FIG. 2, reference numeral 21 is a temperature detector provided on the upstream side of the heat storage tank 6 in the brine of the heat radiation operation circuit 17, and 22 is a flow rate adjusting valve provided in the bypass circuit 19 of the heat storage tank 6. For other configurations,
Since it is the same as the above-described first embodiment, the description thereof will be omitted.

Next, the operation will be described. Similar to the first embodiment, the nighttime electric power is used to generate the brine piping 1
The heat storage operation circuit 16 of No. 5 cools and freezes the nodule cool storage agent 6a in the heat storage tank 6 to store heat. During the daytime pre-cooling work, the heat radiation operation circuit 17 performs a heat exchange operation in the cold brine cold trap 2 to turn water vapor into water droplets. If this pre-cooling work is continued, the amount of water vapor evaporated from the vegetables gradually decreases and the amount of heat exchange with the brine also decreases, so the amount of temperature rise of the brine also becomes small.

As described above, the brine whose temperature is changed by the heat exchange amount of the cold trap 2 is detected by the temperature detector 21 after flowing out of the cold trap 2 and provided in the bypass circuit 19 by the detected temperature. The flow rate adjusting valve 22 is opened by a predetermined amount, a part of the brine is introduced into the bypass circuit 19 and allowed to flow, and the remaining brine is stored in the heat storage tank 6
And is cooled by the nodule regenerator 6a.

As described above, the brine which does not need to be cooled and the cooled brine are merged at the downstream side of the bypass circuit 19 and are mixed to a substantially predetermined temperature and supplied to the cold trap 2.

According to the second embodiment, waste heat dissipation of the heat storage tank 6 can be suppressed and energy can be saved by reusing the return brine having the cooling capacity by detecting the brine return temperature. You can Moreover, since the flow rate of the return brine is controlled, the cold brine supply temperature can be kept constant.

Embodiment 3 Hereinafter, still another embodiment of the present invention will be described with reference to FIG. In FIG. 3, 2
3 is a first temperature detector provided on the upstream side of the return brine of the heat storage tank 6 of the heat radiation operation circuit 17, and 24 is a second temperature detector provided between the brine outflow side of the heat storage tank 6 and the confluence of the bypass circuit 19. It is a temperature detector. The rest of the configuration is the same as that of the second embodiment, and the explanation is omitted.

Similar to the above embodiment, the heat storage operation circuit 1
6, the nodule cool storage agent 6a in the heat storage tank 6 is cooled and frozen to store heat.

Next, during the precooling work, the heat radiation operation circuit 17
The heat exchange operation is performed in the cold brine cold trap 2 to convert the steam into water droplets. At this time, the return brine temperature is detected by the first temperature detector 23 provided on the upstream side of the return brine circuit to the heat storage tank 6 of the heat radiation operation circuit 17, and the flow control valve 22 of the bypass circuit 19 is detected based on the detection result.
Is opened for a predetermined amount, and the return brine is divided by a predetermined amount to flow into the bypass circuit 19. The remaining return brine flows into the heat storage tank 6 and is cooled by heat exchange with the nodule regenerator 6a. The temperature of the cooled brine is measured by the second temperature detector 24.

In this way, the temperature of the return brine from the cold trap 2 is detected, the amount of uncooled brine flowing through the bypass circuit 19 of this return brine, and the temperature of the remaining amount of cooled brine are detected. It is supplied to the cold trap 2 by controlling the amount of heat to be adjusted to a constant temperature.

In the above embodiment, the calorific value of the partial flow rates of the uncooled brine amount and the cooled brine amount is detected, the flow rate adjusting valve 22 is adjusted by the sum calculation, and the brine after the diversion is kept at a constant temperature. However, as in the first embodiment, if the third temperature detector 18 provided on the upstream side of the cold trap 2 is used to detect the brine temperature after merging, more accurate temperature control can be performed. .

According to the third embodiment, the amount of heat is controlled by detecting the cold brine supply temperature, the brine return temperature, and the bypass flow rate, and the brine having the cooling capacity is reused. Heat dissipation can be suppressed, and energy can be saved. Moreover, since the amount of heat is controlled, the cold brine supply temperature can be kept constant.

Fourth Embodiment Still another embodiment of the present invention will be described with reference to FIG. In FIG. 4, 25 is the heat storage tank 6 of the heat storage operation circuit 16.
Brine circulation pump A on the upstream side of and the heat dissipation operation circuit 17:
A cold brine supply circuit that connects the downstream side of 10 with the second electromagnetic on-off valve 27, and 39 is a downstream side of the cold trap 2 of the heat radiation operation circuit 17 and a brine circulation pump B: 11 of the heat storage operation circuit 16. A brine return circuit that connects the upstream side, and 26 is a first electromagnetic on-off valve provided in the heat storage operation circuit 16 between the branch point of this cold brine supply circuit and the heat storage tank 6. The rest of the configuration is the same as that of the above-mentioned embodiment, so the explanation is omitted.

Similar to the above embodiment, the heat storage operation circuit 1
6, the nodule cool storage agent 6a in the heat storage tank 6 is cooled and frozen to store heat. Further, during the pre-cooling work, the heat radiating operation circuit 17 causes the cold brine to perform heat exchange operation in the cold trap 2 to turn water vapor into water droplets.

When the vegetable harvest is busy, a large amount of vegetables are stored in the vacuum tank 1 and the residual heat work becomes active, so that the continuous work is performed. As a result, the cold heat possessed by the nodule cool storage agent 6a is also reduced, so that the heat storage operation circuit 16 such as the compressor 3 is operated to cool and store the nodule cool storage agent 6a in the heat storage tank 6, but this heat storage requires a long time. .

In such emergency cooling, it is effective to directly use the cold brine of the heat storage operation circuit 16 for precooling work. At this time, first, the first electromagnetic opening / closing valve 26 on the circuit upstream side of the heat storage tank 6 is closed in the heat storage operation circuit 16, and the second electromagnetic opening / closing valve 27 of the cold brine supply circuit 25 is opened to store heat. The cold brine of the operation circuit 16 is directly supplied to the cold trap 2 of the heat dissipation operation circuit 17, and further, the brine is returned from the cold trap 2 to the heat storage operation circuit 16 via the brine return circuit 39 to perform precooling work.
In this pre-cooling operation state, when the temperature difference between the temperature detector 18 provided on the upstream side of the cold trap 2 and the temperature detector 21 provided on the downstream side becomes smaller than a predetermined value due to the detection comparison, the compressor 3. By stopping the brine circulation pump B: 11, the heat storage operation by the normal heat storage operation circuit 16 is switched.

In the above-described embodiment, the brine is returned to the heat storage operation circuit 16 via the brine return circuit 39. However, even if the brine return circuit 39 is not provided, the heat storage tank 6 can be used to store heat. The brine can be returned to the driving circuit 16, and the same effect as that of the above-described embodiment can be obtained. However, returning the brine via the brine return circuit 39 has the effect of reducing pipe resistance.

According to the fourth embodiment, when the load is increased, the cold brine of the heat storage operation circuit 16 is directly used for the cold trap 2 without passing through the heat storage tank 6, so that the thermal efficiency of the heat storage tank 6 is improved. Is improved, and the cooling capacity is not reduced, so that the load can be accurately handled.

Embodiment 5 Still another embodiment of the present invention will be described with reference to FIG. In FIG. 5, 28 is the upstream side of the heat storage tank 6 of the heat storage operation circuit 16 and the heat dissipation operation circuit 17
Cold brine supply circuit, which connects the downstream side of the brine circulation pump A: 10 with the first flow rate adjusting valve 29.
Is a first flow dividing valve provided at a branch point between the cold brine supply circuit and the heat storage tank 6, and 38 is a downstream side of the cold trap 2 of the heat radiation operation circuit 17 and a brine circulation pump B: 11 of the heat storage operation circuit 16. A brine return circuit that connects the upstream side and a bypass circuit 31 that connects the circuit upstream side and the downstream side of the heat storage tank 6 of the heat radiation operation circuit 17 with the second flow rate adjusting valve 32 are provided. A second branch valve 33, which is a three-way valve, is provided at a branch point from the heat storage tank 6. 3
Reference numeral 4 denotes a temperature detection device, which is provided on the upstream side of the cold trap 2 and the first temperature detector 35 provided on the cold brine supply circuit 28, the second temperature detector 36 provided on the bypass circuit 31. And a third temperature detector 37,
The flow rate of the flow rate adjusting valve is adjusted according to the detected temperature from these temperature detectors. The rest of the configuration is the same as that of the above-mentioned embodiment, so the explanation is omitted.

Similar to the above embodiment, the heat storage operation circuit 1
6 cools and freezes the nodule cool storage agent 6a in the heat storage tank 6 to store heat. During the busy season of vegetable harvesting, the precooling work becomes active, the heat exchange of the nodule regenerator in the heat storage tank 6 becomes active, and the brine cooling capacity decreases.

The supply brine temperature of the heat radiation operation circuit 17 is
When the third temperature detector 36 on the upstream side of the cold trap 2 is detected and the temperature reaches a predetermined value or higher, the temperature detecting device 33 determines that the cooling capacity of the heat storage tank 6 has decreased,
Command the following operations.

First, the heat storage operation circuit 16 such as the compressor 3 is operated to supply cold brine. Next, the heat storage operation circuit 1
A predetermined amount of cold brine is introduced into the cold brine supply circuit 28 by the first flow dividing valve 30 and the first flow rate adjusting valve 29 of No. 6, and the remaining cold brine is flown into the heat storage tank 6.

Next, the second diversion valve 3 of the heat radiation operation circuit 17
A predetermined amount of return brine is introduced into the bypass circuit 31 by the third and second flow rate adjusting valves 32, and the remaining return brine is flown into the heat storage tank 6. The cold brine introduced into the heat storage tank 6 and the return brine from the cold brine return circuit 38 are cooled in the brine cooler 4 by the heat storage operation circuit 16.

The temperature of the cold brine and the return brine which are supplied after being branched are detected by the temperature detectors 35 and 36, respectively, and the combined temperature is the third temperature detector 37.
The flow rate of either the first flow rate adjusting valve 29 or the second flow rate adjusting valve 32, or both of the flow rate adjusting valves is adjusted according to the detected temperature to cool the brine having a predetermined constant temperature by cold trap 2 To perform stable pre-cooling work.

In the above embodiment, the brine is returned to the heat storage operation circuit 16 via the brine return circuit 38. However, even if the brine return circuit 38 is not provided, the heat storage operation circuit 6 is operated via the heat storage tank 6. The brine can be returned to 16 and has the same effect as the above embodiment. However, returning the brine via the brine return circuit 38 has the effect of reducing pipe resistance.

According to the fifth embodiment, it is possible to obtain the combined effect of the effects of the first to fourth embodiments.

[0073]

According to the first aspect of the present invention, the temperature of the heat radiation operation circuit is detected and the flow of brine to the heat storage tank is controlled so that there is no overcooling of the brine and the cold trap is sufficiently cooled even at the peak cooling time. It is possible to obtain the control circuit of the heat storage device which can be

According to the second invention, the temperature of the heat storage tank downstream side in the heat radiation operation circuit is detected and the flow of brine to the heat storage tank is controlled so that there is no supercooling of the brine and the cold trap of the cold trap is maintained even at the peak cooling time. It is possible to obtain a control circuit for a heat storage device that can perform sufficient cooling.

According to the third invention, the temperature on the upstream side of the heat storage tank in the heat radiation operation circuit is detected to control the flow of brine to the heat storage tank so that the brine is not overcooled and the cold trap of the cold trap is maintained even at the peak cooling time. It is possible to obtain a control circuit for a heat storage device that can perform sufficient cooling.

According to the fourth aspect of the invention, the temperature of the heat radiation operation circuit is detected and the circulation of the brine to the heat storage tank is bypass-controlled so that the brine is not overcooled and the cold trap is sufficiently cooled even at the peak cooling time. It is possible to obtain a control circuit for the heat storage device.

According to the fifth aspect of the invention, the temperature of the heat radiation operation circuit is detected and the flow rate of the brine flowing to the heat storage tank is controlled by bypass so that the brine is not overcooled and the cold trap is sufficiently cooled even at the peak cooling time. It is possible to obtain the control circuit of the heat storage device which can be

According to the sixth aspect of the present invention, it is possible to obtain the control circuit of the heat storage device which controls the supply of the cold brine, does not overcool the brine, and can sufficiently cool the cold trap even at the peak of cooling.

According to the seventh aspect of the invention, the temperatures of the bypass circuit branching point and the merging point of the heat radiation operation circuit are detected to control the bypass flow rate of the flow of brine to the heat storage tank so that the brine is cooled without overcooling. It is possible to obtain a control circuit for the heat storage device that can sufficiently cool the cold trap even during peak hours.

According to the eighth aspect of the present invention, it is possible to obtain the control circuit of the heat storage device which controls the shunting of the cold brine, does not supercool the brine, and can sufficiently cool the cold trap even at the peak cooling time.

According to the ninth aspect of the present invention, it is possible to obtain a control circuit for a heat storage device which controls the return of the brine, does not overcool the brine, and can sufficiently cool the cold trap even at the peak cooling time.

According to the tenth aspect of the present invention, the temperature of the heat radiation operation circuit is detected, the circulation of the brine to the heat storage tank is controlled, and the return brine having a cooling capacity is reused, thereby wasteful heat radiation of the heat storage tank. It is possible to obtain a control method that can suppress the energy consumption and realize energy saving.

According to the eleventh aspect of the invention, the temperature of the heat radiation operation circuit is detected, the circulation of the brine to the heat storage tank is bypass-controlled, and the return brine having a cooling capacity is reused. It is possible to obtain a control method capable of suppressing heat dissipation and realizing energy saving.

According to the twelfth aspect of the invention, the temperature of the heat radiation operation circuit is detected, the bypass flow rate control of the flow of the brine to the heat storage tank is performed, and the return brine having the cooling capacity is reused. It is possible to obtain a control method that can suppress unnecessary heat dissipation and realize energy saving.

According to the thirteenth invention, the temperature of the heat radiation operation circuit is detected, the circulation of the brine to the heat storage tank is controlled, and the return brine having a cooling capacity is reused, thereby wasteful heat radiation of the heat storage tank. Therefore, it is possible to suppress energy consumption, realize energy saving, and control the flow rate of the return brine. Therefore, it is possible to obtain a control method capable of keeping the cold brine supply temperature constant.

According to the fourteenth aspect, when the load increases, the cold brine of the heat storage operation circuit is directly used for the cold trap without passing through the heat storage tank, so that the thermal efficiency is improved and the cooling capacity is improved. Since it does not decrease, it is possible to obtain a control method that can cope with the load.

According to the fifteenth invention, the amount of heat is controlled by detecting the cold brine supply temperature, the brine return temperature and the bypass flow rate, and the return brine having a cooling capacity is reused. It is possible to obtain a control method capable of suppressing heat radiation, realizing energy saving, and controlling the amount of heat to keep the cold brine supply temperature constant.

The sixteenth aspect of the present invention controls waste heat in the heat storage tank by controlling the amount of heat by detecting the cold brine supply temperature, the brine return temperature and the bypass flow rate and reusing the return brine having a cooling capacity. It is possible to suppress and save energy, and moreover, the flow of return brine and the amount of heat can be controlled to keep the cold brine supply temperature constant, and when the load increases, the cold brine of the heat storage operation circuit can be directly fed without passing through the heat storage tank. By utilizing it for a cold trap, the thermal efficiency is improved and the cooling capacity is not lowered as compared with the case of using the heat storage tank, so that it is possible to obtain a control method that can cope with the load.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a heat storage device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a heat storage device according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram of a heat storage device according to a third embodiment of the present invention.

FIG. 4 is a circuit diagram of a heat storage device according to a fourth embodiment of the present invention.

FIG. 5 is a circuit diagram of a heat storage device according to a fifth embodiment of the present invention.

FIG. 6 is a circuit diagram of a conventional heat storage device.

FIG. 7 is a partial cross-sectional front view of the heat storage tank.

[Explanation of symbols]

1 vacuum tank, 2 cold trap, 4 brine cooler, 6 heat storage tank, 15 brine piping, 16 heat storage operation circuit, 17 heat radiation operation circuit, 18 temperature detector, 19 bypass circuit, 20 directional switching valve, 21 temperature detector, Two
2 flow rate control valve, 23 first temperature detector, 24 second
Temperature detector, 25 cold brine supply circuit, 26 1st
Solenoid on-off valve, 27 second solenoid on-off valve, 28 cold brine supply circuit, 29 first flow rate adjusting valve, 30 first flow dividing valve, 31 bypass circuit, 32 second flow rate adjusting valve, 33 second Shunt valve, 34 Temperature detector, 35
1st temperature detector, 36 2nd temperature detector, 37 3rd temperature detector, 38 brine return circuit, 39 brine return circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumio Matsuoka 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd.

Claims (16)

[Claims] 1. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a temperature detection device for detecting the temperature of the brine is provided in the heat dissipation operation circuit, and the heat storage tank is connected to the heat storage tank in response to the transition of the temperature of the brine to a predetermined temperature. A control circuit of a heat storage device, characterized in that the circulation of brine of the above is suppressed. 2. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a temperature detection device is provided on the heat storage tank downstream side of the heat dissipation operation circuit. . 3. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a temperature detection device is provided on the heat storage tank upstream side of the heat dissipation operation circuit. . 4. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a heat storage tank bypass circuit is provided in the heat dissipation operation circuit, and a direction switching valve is provided at a bypass circuit branch point. The control circuit of the heat storage device according to 1. 5. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a heat storage tank bypass circuit is provided in the heat dissipation operation circuit, and a flow rate adjusting valve is provided in the bypass circuit. A control circuit for the heat storage device described. 6. A heat storage device having a heat storage operation circuit and a heat radiation operation circuit, wherein a heat storage tank upstream side of the heat storage operation circuit and a brine circulation pump downstream side of the heat radiation operation circuit are connected with a second electromagnetic on-off valve. The control circuit of the heat storage device according to claim 1, wherein a cold brine supply circuit for controlling the heat storage device is provided, and a first electromagnetic opening / closing valve is provided in a heat storage operation circuit between the branch point of the cold brine supply circuit and the heat storage tank. . 7. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a bypass circuit of a heat storage tank having a flow rate adjusting valve is provided in the heat dissipation operation circuit, and a first temperature detection is provided upstream of a bypass circuit branch point. The control circuit for the heat storage device according to claim 1, further comprising: a heat storage tank, and a second temperature detector provided between the heat storage tank and the junction of the bypass circuit. 8. A heat storage device having a heat storage operation circuit and a heat radiation operation circuit, wherein a first flow rate adjusting valve and a temperature detection device are provided between a heat storage tank upstream side of the heat storage operation circuit and a brine circulation pump downstream side of the heat radiation operation circuit. A cold brine supply circuit to be connected to the heat storage tank is provided, a first branch valve is provided at a branch point between the cold brine supply circuit and the heat storage tank, and a heat storage tank bypass circuit having a second flow rate adjusting valve is provided in the heat radiation operation circuit. The control circuit of the heat storage device according to claim 1, wherein a second branch valve is provided at a branch point between the bypass circuit and the heat storage tank. 9. The control circuit for the heat storage device according to claim 1, further comprising a brine return circuit that connects the cold trap downstream side of the heat radiation operation circuit and the brine circulation pump upstream side of the heat storage operation circuit. . 10. In a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the temperature of the brine in the heat dissipation operation circuit is detected, and the brine flows into the heat storage tank in accordance with the transition of the temperature of the brine to a predetermined temperature. A control method characterized by suppressing. 11. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein the temperature of the brine in the heat dissipation operation circuit is detected, and the brine flows to the heat storage tank in accordance with the transition of the temperature of the brine to a predetermined temperature. A control method comprising performing a bypass operation for suppressing 12. In a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, the temperature of the brine in the heat dissipation operation circuit is detected, and the brine flows into the heat storage tank in accordance with the transition of the temperature of the brine to a predetermined temperature. The control method is characterized by performing a bypass operation for suppressing the above and adjusting the bypass flow rate of the brine. 13. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, a cold heat temperature detection step provided in the heat dissipation operation circuit, a temperature comparison step of comparing and comparing the detected cold heat temperature with a set value, and this temperature. According to the comparison determination result, the cold heat distribution step of dividing the cold heat into the bypass circuit and the heat storage tank, and the temperature mixing step of joining the brine not cooled and the cooled brine by this cold heat distribution,
A control method for supplying temperature-blended brine. 14. In a heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, a step of stopping the supply of cold brine to the heat storage tank by closing the first electromagnetic on-off valve provided in the heat storage circuit,
A control method for directly supplying cold brine to a cold trap by opening an operation of a second electromagnetic opening / closing valve of a cold brine supply circuit that connects a heat storage operation circuit and a heat dissipation operation circuit. 15. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a part of the return brine is bypassed according to the return brine temperature detection step A provided in the heat dissipation operation circuit and the detected cooling temperature determination result. The non-cooling process divided into the circuit and the remaining brine are cooled in the heat storage tank,
The cooled brine temperature detecting step B, the temperature adjusting step of adjusting the brine temperature and the flow rate detected in the brine temperature detecting steps A and B by the sum operation, and the branched brine are joined to obtain a constant temperature value. Control method to keep and supply. 16. A heat storage device having a heat storage operation circuit and a heat dissipation operation circuit, wherein a step of distributing a predetermined amount of cold brine to a heat storage tank by a first flow dividing valve provided in the heat storage operation circuit, and a heat dissipation operation circuit of the heat storage operation circuit. A step of supplying a predetermined amount of cold brine by a first flow rate adjusting valve of a cold brine supply circuit that connects the cooling brine and a step of supplying a predetermined amount of return brine by a second flow rate adjusting valve of a bypass circuit of the heat dissipation operation circuit; A control method in which the return brine is merged, and the brine is supplied while being kept at a constant temperature by a temperature adjustment step of operating the flow rate adjustment valve by detecting the temperature of the merged brine.