JP2002081815A - Duct type cold storage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold storage system capable of cooling by a method decreased in consumption energy. SOLUTION: A duct type cold storage system is formed in such a constitution that a heat exchanger 7 in CO2 piping 10 to form a refrigerating cycle is a heating means to heat water at the internal part of a hot water feeder body 1; a heat-exchanger 17 is a cooling means to cool brine to cool a cold storage agent 26; air cooled through heat exchange with the cold storage agent 26 cooled through operation of the refrigerating cycle and air that is not cooled are mixed together by a damper 29; and air conditioned to a specified temperature is fed to a cold storage box 30 through a duct 28 provided on an inner surface with vapor condensation detecting means S4 and S5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage box whose inside is maintained at a low temperature.

[0002]

2. Description of the Related Art In order to maintain a low temperature inside,
Refrigerators and freezers are well known. These refrigerated freezers generate a low temperature by utilizing heat input / output during compression / expansion of the refrigerant, and power such as electric power is consumed in the compression stroke of the refrigerant.

[0003]

In the storage of dry matter, bottles, cans, and the like, it is not necessary to obtain a remarkably low temperature and it is not necessary to control the temperature accurately. There was a request to keep it, and it was necessary to respond to such a request.

[0004]

According to the present invention, as a specific means for solving the above-mentioned problems of the prior art, air cooled in a low-temperature generating section is provided in a room and separated from the low-temperature generating section. Circulating through a duct in the cold storage box, and having dew condensation detecting means for detecting dew condensation in the duct, and forcibly circulating the air based on an output of the dew detecting means. A duct-type cold storage system having the configuration of 1,

[0005] In the duct-type cold storage system of the first configuration, the low-temperature generating unit has a second configuration in which the low-temperature generating unit has a cooling agent.

[0006] The duct-type cold storage system according to the third or third aspect, wherein the duct-type cold storage system according to the first or second configuration has a configuration in which water in the duct condensed in the low-temperature generating section is drained. When,

The duct-type cold storage system according to any one of the first to third configurations, wherein the cold storage box is incorporated in a system kitchen;

In the duct type cold storage system according to any one of the first to third configurations, a duct type cold storage system according to a fifth configuration, wherein the inside of the cold storage box corresponds to the inside of a system kitchen,

In the duct type cold storage system of any one of the first to fifth configurations, the low-temperature generating section connects the compressor, the radiator, the pressure reducing device, and the heat absorber in a ring shape and circulates CO ₂ as a working medium. It is an object of the present invention to solve the above-mentioned problems of the related art by providing a duct-type cold storage system having a sixth configuration configured using the heat absorber of the CO ₂ water heater.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. A city water inlet pipe 3 equipped with a pressure reducing valve 2 is connected to a lower portion of the water heater main body 1.
A hot water supply pipe 5 having a pressure regulating valve 4 is connected to an upper part of the pipe.

Further, a heating pipe 8 having a pump 6 and a heat exchanger 7 interposed in the middle of the water heater main body 1 is connected.
One end of the heating pipe 8 is connected to the lower part of the water heater main body 1, and the other end is connected to the upper part of the water heater main body 1, and the temperature of water measured by the temperature measuring means S 1 provided at a substantially middle portion of the water heater main body 1 is predetermined. The water in the water heater main body 1 is circulated so as to exit from the lower side and to flow in from the upper side by the pump 6 operated when the temperature is lower than, for example, 90 ° C.

A CO ₂ pipe 10 forming a refrigeration cycle
A pump which is operated in synchronization with the CO ₂ are sealed in the tube and the pump 6 (the compressor) 11 is compressed, after the CO ₂ compressed in the first stage is once cooled by air 12 ,
The second-stage compression is performed by the pump 11 by merging with the CO ₂ returned via the heat exchanger 14 described later. The CO ₂ compressed to a high temperature and a high pressure reaches the heat exchanger 7 and the heating pipe 8
It is provided so as to exchange heat with water supplied from a counter flow and to heat this.

Further, heat exchange with water in the heat exchanger 7 causes a part of the CO ₂ whose temperature has decreased, for example, 10-20% of CO 2.
₂ is supplied to the second stage of the pump 11 via the expansion valve 13 and the heat exchanger 14, and merges with the one via the air cooler 12 as described above.

The remaining CO ₂ that does not flow to the side of the expansion valve 13 and the heat exchanger 14 is throttled by the expansion valve 13 and
The gas is cooled by CO ₂ that evaporates in the above, and reaches a three-way valve 15 in a gas-liquid mixed state in which a part is liquefied.

CO in a gas-liquid mixed state that has exited the three-way valve 15
₂ is diverted into one that evaporates in the heat exchanger 17 via the expansion valve 16 and one that evaporates in the heat exchanger 19 via the expansion valve 18, merges with the three-way valve 20, and joins the pump 11. It returns, is compressed again, and the circulation is continued.

The flow ratio of CO ₂ evaporating via the expansion valve 16 and the heat exchanger 17 to CO ₂ evaporating via the expansion valve 18 and the heat exchanger 19 is determined by the amount of cold storage of the cold storage agent 26 described later. Until the temperature reaches the upper limit (the temperature of the brine exiting the heat exchanger 23 becomes equal to or lower than a predetermined temperature), all or most of the brine flows to the side passing through the heat exchanger 17; It is a thing to flow. Note that the regenerator 2
The flow rate of CO ₂ passing through the heat exchanger 19 may be increased as the amount of cold storage of 6 approaches the upper limit.

The brine pipe 21 is provided so that the brine sealed in the pipe circulates and flows between the heat exchangers 17 and 23 by the operation of the pump 22 operated in synchronization with the pumps 6 and 11. ing. Also, brine piping 2
1, pipe connecting means 24 and 25 are provided as shown, and the brine pipe 21 is connected at this portion, or provided so that the inside of the pipe can be sealed and separated at this portion.

The heat exchanger 23 is connected to the brine pipe 21
Heat transfer tube 21A constituting a part of the heat transfer tube, and a specific heat of paraffin hydrate (for example, squalane hydrate, sodium acetate hydrate, etc. which solidifies at 5 ° C. to 10 ° C.) disposed around the heat transfer tube 21A And a regenerator 26 having a large size.

A duct 28 in which a blower 27 is interposed
Is provided so as to branch into a duct 28A passing through the portion of the regenerator 26 of the heat exchanger 23 and a duct 28B not passing through the portion of the regenerator 26 on the way, and to join via a damper 29, and then to be insulated. It is provided so as to reach the suction side of the blower 27 via the cold storage box 30 made of material.

Therefore, of the air sent by the blower 27,
The air flowing through the duct 28A exchanges heat with the regenerator 26 (having radiating fins) 26 of the heat exchanger 23 via the fins 6A to reach the damper 29, and the air flowing through the duct 28B does not exchange heat with the damper 29. And the duct 28
The flow rate ratio of the air flowing through the duct A to the air flowing through the duct 28B is determined by the temperature measuring means S2 installed downstream of the damper 29.
Is controlled by the damper 29 so that the temperature measured by the controller becomes a predetermined temperature, for example, 15 ° C.

A dew condensation detecting means (general-purpose dew sensor) S4 for detecting dew condensation caused by air flowing into the cold storage box 30 from the duct 28, and a dew condensation detecting dew condensation caused by air flowing out of the cold storage box 30 to the duct 28. Detecting means (general-purpose dew sensor) S5 is provided as shown.

That is, the dew condensation detecting means S4 is connected to the duct 28
The dew condensation detecting means S5 is provided at a position in the duct where the air returning from the cold storage box 30 enters the duct 28.

The temperature of the internal space of the cold storage box 30 measured by the temperature measuring means S3 is, for example, 15 ° C. to 18 ° C.
In order to stabilize at ℃, air is blown at 18 ° C or higher, and is stopped at 15 ° C or lower.

When dew condensation is detected (detected) in either one of the dew condensation detecting means S4 and S5, the blower 27 is forcibly started. In this case, the operation of the blower 27 is performed until a predetermined time elapses from the detection of dew condensation or until the detection outputs of the dew condensation detecting means S4 and S5 are turned off.

In the duct-type cold storage system having the above structure, the pump 11 is operated when the temperature measuring means S1 is measuring a low temperature of less than 90 ° C. as described above,
The CO ₂ that has been compressed by the operation of the pump 11 and has become high temperature and high pressure flows to the heat exchanger 7, and heats the water supplied by the pump 6 and flowing through the heat exchanger 7.

Since the water heated by the CO ₂ in the heat exchanger 7 continues to flow into the water heater main body 1 from above until the temperature measuring means S1 measures 90 ° C., the water in the water heater main body 1 is heated. Subsequently, the temperature becomes predetermined high-temperature water. Note that the hot water storage temperature and the hot water storage amount of the water heater main body 1 are not limited to these, and another hot water measuring device can be added to the lower portion to change the hot water storage amount, for example.

On the other hand, in the heat exchanger 7 to heat the water lowering the temperature, further CO ₂ which is cooled becomes a gas-liquid mixed state by the CO ₂ evaporates in the heat exchanger 14 is diverted heat exchanger 1
The CO ₂ flowing to the heat exchangers 17 and 19 is supplied to the heat exchanger 17 by the pump 22, removes heat from the brine flowing through the heat exchanger 17, is restored to a complete gas, and flows to the heat exchanger 19. The CO ₂ then takes heat from the outside air supplied by the fan 19A and is restored to a complete gas, and the three-way valve 2
The gaseous CO ₂ joined at 0 is compressed again by the pump 11 and the circulation is continued.

The brine cooled by the CO ₂ evaporating in the heat exchanger 17 cools the regenerator 26 disposed therearound when flowing through the heat transfer tube 21A of the heat exchanger 23.

Then, it is sent by the operation of the blower 27,
As described above, the air flowing through the duct 28A and cooled by the heat exchange through the regenerator 26 and the fins 26A for radiating the heat, and the air flowing through the duct 28B without heat exchange have a predetermined temperature of 15 ° C. as described above. Thus, the flow ratio is controlled by the damper 29. For this reason, since the air cooled at 15 ° C. is always supplied to the cold storage box 30 made of a heat insulating material, the inside of the cold storage box 30 is kept at a predetermined low temperature.

The air whose temperature has risen by cooling the inside of the cold storage box 30 is again diverted and supplied by a blower 27 to a duct 28A having a cold storage agent 26 and a duct 28B having no cold storage agent 26, and the air is cooled to a predetermined temperature of 15 ° C. It is adjusted and the circulation is continued.

Since the dew detecting means S4 and S5 are installed as described above, the high humidity air enters the cold storage box 30 by opening and closing the door, and the high humidity air flows into the low temperature duct 28. Even if dew condensation occurs, the dew condensation is quickly detected and the blower 27 is forcibly operated.
The condensed water quickly evaporates into dry air circulated and supplied through the duct 28.

The water absorbed by the dry air is supplied to the heat exchanger 2
The cooling water is condensed by cooling at 3, and is discharged to the outside of the cool air circulation system via a condensed water discharge port (a drain duct may be connected) 28 </ b> C. For this reason, the wet state continues for a long time and the duct 2
There is no unsanitary condition such as the occurrence of mold on the inner surface of No. 8.

Even if the water heater main body 1 is for household use having a small capacity, by installing a sufficient amount of the regenerator 26, it is possible to supply hot water to the bath through the hot water supply pipe 5. Since a large amount of cold generated in the heat exchanger 17 of the CO ₂ pipe 10 is sent to the regenerator 26 by brine and stored,
Even when hot water is not supplied by the water heater main body 1, air at a predetermined temperature of 15 ° C. can be sent to the cold storage box 30 made of a heat insulating material to cool the inside.

Incidentally, as the cold storage box 30, for example, FIG.
As shown in (A), a drawer-type cold storage box may be provided at the lower side of the system kitchen 31 in which the inside is insulated to store dry matter, bottling, canning, and the like. As shown in FIG. 2 (B), a bacteria-type garbage disposer (not shown) may be built in and incorporated in the system kitchen 31.

In the cold storage box 30 having a built-in garbage disposal machine, it is necessary to keep the cold so as not to generate odor.
Excessive cooling lowers the activity of bacteria and hinders the decomposition of garbage, so it is generally preferable to keep the temperature below 20 ° C.

The cold storage box 30 may be the entire space below the sink 32 as shown in FIG. 2C. Although it is well known that the area under the sink is not suitable for storing foods at high temperature and high humidity, it is cooled by heat exchange with the cold storage agent 26, and at the same time, the dehumidified air is supplied to this part, so that the area under the sink can be cooled. Since the space is cooled and dried, food and the like can be stored.

The cool box 30 is connected to the system kitchen 31.
2C, the duct 28 is, for example, as shown in FIG. 2C, a back plate 33 of the system kitchen 31 having a cool air inlet / outlet opening and a wall 34 of the house.
Attached to the water heater main body 1 to be installed outdoors, the heating pipes 8, CO ₂ pipe 10, the brine pipe 21 to the cool air貯冷box 30 activates the blower 27 to circulate feed.
Further, the duct 28 can be attached to a bottom plate 35 provided with a cool air inlet / outlet (not shown).

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the present invention.

For example, the blower 27 which operates when at least one of the dew condensation detecting means S4 and S5 detects dew condensation.
May be operated when the dew condensation detecting means S4 and S5 detect dew condensation, or may be forcibly operated for a predetermined time, for example, three minutes once the dew detection is performed. Even if S5 does not detect condensation, the operation may be continued for a predetermined time, for example, one minute for safety.

Further, a fungicide may be provided on the inner surface of the duct 28 in the vicinity of where the dew detecting means S4 and S5 are attached so that even if dew condensation occurs, the occurrence of mold can be prevented. good.

The duct 28 may be formed so that the air cooled in the cold storage box 30 does not return to the ducts 28A and 28B.

[0042]

As described above, the duct-type cold storage system of the present invention supplies cooling air obtained by utilizing the low temperature obtained when hot water is produced in a water heater through a duct into a box for cooling. Therefore, the cost performance is extremely excellent. In addition, since there is no mechanical drive unit inside the cold storage box, it is also effective for noise reduction.

Also, since dew condensation in the duct can be detected,
When dew condensation occurs, it is possible to forcibly operate the blower to evaporate the condensed water, and there is no unsanitary condition such as mold occurring after a long time in a wet state.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a device configuration of the present invention.

FIG. 2 is an explanatory view showing a specific example of a cold storage box, (A) is a draw-out type cold storage box, (B) is a cold storage box having a built-in bacterial garbage processing machine, and (C) is a sink bottom. The space is a cold storage box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hot-water heater main body 2 Pressure reducing valve 3 City water introduction pipe 4 Pressure regulating valve 5 Hot water supply pipe 6 Pump 7 Heat exchanger 8 Heating pipe 10 CO ₂ pipe 11 Pump 12 Air cooler 13 Expansion valve 14 Heat exchanger 15 Three-way valve 16 Expansion Valve 17 Heat exchanger 18 Expansion valve 19 Heat exchanger 20 Three-way valve 21 Brine pipe 21A Heat transfer pipe 22 Pump 23 Heat exchanger 24, 25 Piping connection means 26 Cool storage agent 27 Blower 28, 28A, 28B Duct 28C Condensate outlet 29 Damper 30 Cold storage box 31 System kitchen 32 Sink 33 Back plate 34 Wall 35 Bottom plate S1, S2, S3 Temperature measurement means S4, S5 Dew detection means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F28D 20/02 F28D 20/00 C (72) Inventor Junichi Mogi 2-chome Keihanhondori 2-chome, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 3L044 AA00 BA01 CA11 DA01 DC03 EA04 FA03 HA01 HA02 JA01 KA04 KA05 3L045 AA01 BA01 CA02 DA02 DA05 EA01 FA02 GA07 HA01 KA08 KA14 LA02 MA00 MA02 NA03 PA02 PA04

Claims (6)

[Claims] An air cooled in a low-temperature generating section is circulated through a duct in a cold storage box provided in a room and separated from the low-temperature generating section, and dew condensation in the duct is detected. A duct-type cold storage system, characterized in that the air-conditioning unit is provided with a dew-condensation detecting means, and the air is forcibly circulated based on the output of the dew-condensing detection means. 2. The duct-type cold storage system according to claim 1, wherein the low-temperature generating section has a cold storage agent. 3. The duct-type cold storage system according to claim 1, further comprising a structure for draining water in the duct condensed in the low-temperature generating section. 4. The duct type cold storage system according to claim 1, wherein the cold storage box is incorporated in a system kitchen. 5. The duct type cold storage system according to claim 1, wherein the inside of the cold storage box corresponds to the inside of a system kitchen. 6. The low-temperature generating section is configured by connecting a compressor, a radiator, a pressure reducing device, and a heat absorber in a ring shape and using the heat absorber of the CO ₂ water heater that circulates CO ₂ as a working medium. The duct-type cold storage system according to any one of claims 1 to 5, wherein