JP2001272136A - Air-conditioning/hot water supply heat source system for housing or the like, and reform of regenerative air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convenient and comfortable heat source system by performing heat accumulation utilizing midnight power as an air-conditioning/hot water supply heat source to be used in a housing or the like, and performing ice heat accumulation as a heat source for cooling, and utilizing the high- temperature energy on the side of a condenser generated at that time for hot water supply thereby contriving energy saving and centralization of heat sources. SOLUTION: An air conditioner and a warm water heat accumulator are installed, centering around a heat pump, and these are coupled with one another by refrigerant pipes thereby constituting the system such that it utilizes cold and warm heat effectively, and besides when the warm heat is insufficient, the heat is replenished from a midnight power heat accumulator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for energy-saving production of a hot water source for heating and heating and a cold heat source for cooling used in a house, and to an efficient use thereof.

[0002]

2. Description of the Related Art Conventionally, heat storage using midnight electric power has mainly been heat storage for hot water supply, but recently, ice heat storage has been used as a heat source for cooling. In each case, a method is used in which heat is stored in a heat storage tank and transported to an air conditioner by a heat medium.

The inventor of the present invention has invented Japanese Patent Application Laid-Open No. 9-14689 with respect to a heat source for air conditioning in a house or the like.

A heat pump used as a heat source device is:
It is a heat engine that separates cold and warm heat. Refrigerators are used when the heat used is cold, and heat pumps are used when the heat used is warm.

[0005] In the case of a refrigerator, the low-temperature side (evaporator side) is used for cooling or ice making, and the high-temperature side (condenser side) is discharged as hot water or radiated to the atmosphere as high-temperature exhaust gas.

In the case of a heat pump, contrary to the case of a refrigerator, the high temperature side (condenser side) is used for heating and hot water supply, and the low temperature side (evaporator side) is discharged as cold water or cool air. . These can be thought of as collecting heat from water or air using well water or river water / air as a heat source.

Conventionally, only one of cold and warm heat is generally used as a refrigerator or a heat pump.

[0008] Recently, however, devices that use waste heat for hot water supply when used as a refrigerator have been developed. However, a market has been formed due to cost, technical aspects such as temperature and efficiency, and difficulty in handling. It has not been done yet.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to make effective use of heat that has been discarded without being used conventionally, because energy consumption affects the global environment, and energy saving is called for. . It aims to reduce energy consumption by using it easily and efficiently.

In a method of storing heat in a heat storage tank using cold electricity or warm heat using midnight power and transporting the heat to an air conditioner with a heat medium, a pumping device and a piping device for the transportation are required. In addition to the necessity of transporting power along with transportation, the power of transporting pumps is changed to heat, and in the case of cooling, it is a load. As a matter of course, these facilities require costs such as operation management costs in addition to power costs.

In Japanese Patent Application Laid-Open No. 9-14689, the heat storage tank and the air conditioner are integrated, and the pumping equipment for transportation and the piping equipment are eliminated. A cost problem has arisen in the manufacture of air conditioners. In addition, air leakage at the outside air intake damper of the air conditioner has become a problem.

[0012]

According to the present invention, an air conditioner, a heat storage device and an atmospheric heat exchanger are provided for a heat pump.

The air conditioner comprises a heat storage air conditioner and an air conditioning heat source coil. The hot water heat storage device includes a hot water heat storage device and a late-night power storage device.

The heat storage air conditioner has a structure in which a duct that forms a flow path for air flowing into and out of the heat storage air conditioner is provided above the air conditioner. There are no openings on the side walls that obstruct confidentiality, such as dampers that can be opened and closed.

A plurality of ducts in the heat storage air conditioner are provided so as to be inserted into both ends of a large number of heat storage bodies from the upper surface of the air conditioner, and are integrated with each other by an upper header. In the air conditioner, heat storage elements shall be installed densely so as not to impede the flow of air, and ventilation ducts for blow-out and suction ports shall be opened in the duct so that the flow inside the air conditioner does not become uneven.

The hot water heat storage device of the hot water heat storage device has a built-in refrigerant heat exchanger (condenser), a hot water supply heat exchanger, and a heat source heat exchanger (for midnight power), and a refrigerant heat exchanger and a hot water supply heat exchanger from below. , A heat source heat exchanger and then a hot water supply heat exchanger.
The hot water supply heat exchanger is divided into upper and lower parts, but they are connected by pipes and are integrated.

The hot water regenerator functions as a condenser during cooling (including ice heat storage operation), exchanges heat with a heat storage material (water), and radiates heat by an atmospheric heat exchanger when it is saturated.

When used as a heat pump, the atmospheric heat exchanger takes heat from the atmosphere, and when used as a refrigerator, it becomes a radiator when the hot water regenerator becomes saturated.

At the time of heating, heat is taken from the atmospheric heat exchanger, hot water is stored in the heat storage air conditioner by the air-conditioning heat source coil, and is stored in the hot water storage device when it is saturated. When the hot water regenerator becomes saturated, the operation of the heat pump is stopped.

[0020]

According to the present invention, since the air conditioner, the heat storage device and the atmospheric heat exchanger are provided for the heat pump, the high and low temperature heat generated by the heat pump can be effectively used.

The air conditioner is composed of a heat storage air conditioner and an air conditioning heat source coil, and circulates air with a heat source fan. Therefore, the heat storage air conditioner can store ice heat or hot water heat using midnight power. The flow in the heat storage air conditioner at this time is a reverse flow during air conditioning.

When the heat storage capacity of the heat storage air conditioner is insufficient, air conditioning can be performed using an air conditioning heat source coil.

The air conditioner is composed of a heat storage air conditioner and an air conditioner heat source coil.
A large number of heat storage units are densely installed in the air conditioner so as not to hinder the flow of air. This heat storage body only needs to enclose a heat storage material. Since the refrigerant pipe of the heat storage body is omitted, the manufacturing cost can be reduced.

In the thermal storage air conditioner, a plurality of ducts forming a flow path for air flowing in and out are provided so as to be inserted from the upper surface of the air conditioner into both ends of the heat storage group, and openings such as duct connections are provided on side surfaces of the air conditioner. Therefore, it is possible to eliminate leakage (outflow / inflow) of air in the thermal storage air conditioner.

In particular, the air in the heat storage air conditioner during the ice heat storage is lower than the ambient temperature and has a higher specific gravity, so that the air stays in the air conditioner casing (box type) to prevent leakage.

The heat storage material (water) of the hot water heat storage device has a higher specific temperature due to the difference in specific gravity depending on the temperature. That is, a temperature layer having an upper high temperature and a lower low temperature is formed. This is convenient for ensuring hot water supply temperature in hot water supply. Here, a description is given using a hot water supply heat exchanger for hot water supply, but the heat storage material may be directly supplied with hot water. In this case, the hot water supply heat exchanger can be omitted. However, care must be taken in selecting the materials used for hot water regenerators. (While the description of the hot water supply direct heat storage is omitted, it is the same as when a hot water supply heat exchanger is used.)

Since the hot water regenerator is installed in the order of the refrigerant heat exchanger, the hot water supply heat exchanger, the heat source heat exchanger, and the hot water supply heat exchanger from the lower part, the condenser is located in the lower part of the hot water regenerator where the temperature is lowest. Exchange heat efficiently from working.

The hot water supply heat exchanger is divided into upper and lower parts,
Tap water flows in from the bottom, rises while being heated, and enters the upper heat exchanger. With such an arrangement, a predetermined hot water supply temperature can be efficiently secured through the upper high-temperature portion.

When a predetermined hot water supply temperature cannot be secured due to a shortage of capacity (temperature) of the hot water regenerator, heat is replenished from the midnight power regenerator through the heat source heat exchanger. At this time, the upper part from the heat source heat exchanger is heated. The lower portion is not heated but only heats the condensation heat of the refrigerant. The presence of the low-temperature portion ensures that the hot water regenerator is effective and saves energy with high efficiency. This occurs when the tap water temperature decreases in winter or when heating operation is performed.

Low temperature (ice) and high temperature (hot water supply / heating) required by seasonal changes, that is, changes in temperature and water temperature
Since the heat storage capacity changes, it is adjusted by an atmospheric heat exchanger. When used as a heat pump, the atmospheric heat exchanger takes heat from the atmosphere, and when used as a refrigerator, it becomes a radiator when the hot water regenerator becomes saturated.

During heating, heat is taken from the atmospheric heat exchanger, and the heat source air conditioner stores hot water in the heat storage air conditioner, and when saturated, stores heat in the hot water heat storage device. When the hot water regenerator becomes saturated, the operation of the heat pump is stopped.

In the intermediate period (a period in which cooling and heating are not required), heat is stored in the hot water regenerator as a heat pump. By using a heat pump, about 2 to 5 times as much heat can be produced as compared to the case where electric power is directly converted to heat, which contributes to energy saving.

[0033]

FIG. 1 is an air conditioning / sanitary heat source system diagram. The heat pump 1 is mainly composed of an air conditioner 2 and a hot water heat storage device 3. The refrigerant pipes 4 are connected to each other.

The heat pump 1 has an atmospheric heat exchanger 5 for exchanging heat with the atmosphere.

The air conditioner 2 comprises a heat storage air conditioner 6, an air conditioning heat source coil 7, an air supply fan 8, a heat source fan 9, a filter 1
0, an outside air intake 11.

The hot water heat storage device 3 comprises a hot water heat storage device 12, a midnight power storage device 13, and an electric heater 14.

FIG. 2 is a detailed view of the configuration of the heat storage air conditioner 2. FIG. 3 is a view of a cross section taken along the line AA of the heat storage air conditioner 2 as viewed in the direction of the arrow.

When manufacturing the heat storage air conditioner 6, the heat storage element 1
7 are installed densely so as not to hinder the flow of air. The large number of heat storage bodies 17 only need to enclose a heat storage material. Since the refrigerant pipe of the heat storage body 17 is omitted, the manufacturing cost can be reduced.

In the heat storage air conditioner 7 of the heat storage air conditioner 2, the duct 15 forming the flow path of the air flowing into and out of the heat storage air conditioner 7 is connected to both ends of a plurality of heat storage elements 17 from the upper surface of the air conditioner formed of the heat insulating casing 16. Since there is no opening such as a duct connection on the side of the air conditioner, air leakage (outflow / inflow) in the heat storage air conditioner can be eliminated.

In particular, the air in the heat storage air conditioner 6 during ice heat storage (using late-night electric power) is lower than the ambient temperature and has a higher specific gravity, so that the air accumulates in the heat insulating casing 16 (box type), and the side opening is formed. Since there is no air leakage, air leakage can be completely prevented.

In addition, the heat storage air conditioner 2 includes a damper 18 for switching an air flow path and a flow rate necessary for operation, and a duct 15 in a heat insulating casing 16.
And a thermostat 20 for detecting the supply air temperature.

FIG. 4 is a single view of the heat storage body 17, in which a heat storage material 21 is sealed. At the upper part, there is a gap 22 for absorbing expansion and contraction of the heat storage material 21. As the heat storage material, various salts having different freezing points may be used based on water.

FIG. 5 is a detailed view of the configuration of the hot water heat storage device 3. The hot water heat storage device 12 includes a refrigerant heat exchanger 23, a hot water supply heat exchanger 24, a heat source heat exchanger 25, and a hot water supply heat exchanger 24 from the bottom.
Are installed in this order, so that it works as a condenser in the lower part of the hot water regenerator where the temperature is the lowest, so that heat is exchanged efficiently.

Although the hot water supply heat exchanger 24 is divided into upper and lower parts, tap water flows in from the lower water supply pipe 26, rises while being heated, enters the upper hot water supply heat exchanger 24, and enters from the hot water supply pipe 27. Hot water is supplied. With such an arrangement, a predetermined hot water supply temperature can be efficiently secured.

When a predetermined hot water supply temperature cannot be secured due to the shortage of the capacity (temperature) of the hot water regenerator 12, heat is supplied from the late-night power regenerator 13 through the heat source heat exchanger 25. The temperature of the hot water regenerator 13 is detected by the thermostat 28, and when the temperature falls below a predetermined temperature, the electric valve 29 is opened and high-temperature water is supplied from the late-night electric power regenerator 13 to the heat source heat exchanger 25 for replenishment.
This replenishment is required when the temperature of the refrigerant winter tap water drops or when heating operation is performed. Further hot water regenerator 1
2 is provided with a connection port for a heating outgoing pipe 30 and a heating return pipe 31. (Depending on the hot water supply method, a heating circuit heat exchanger may be provided.)

The midnight electric power storage tank 13 is energized by the electric heater 14 to store heat in the midnight time zone. When the temperature reaches a predetermined value, the temperature is detected by the thermostat 32 and the energization is stopped. When the temperature in the midnight power heat storage tank 13 falls below a predetermined temperature, the temperature is detected by the thermostat 33 even when it is not in the midnight time zone, and the electric heater 14 is energized to store heat. The energization is stopped by the thermostat 32.

FIGS. 6 and 7 are refrigerant circulation system diagrams during heat pump operation. The flow of the refrigerant is indicated by arrows along the refrigerant pipe 4. Compressor 34, refrigerator / heat pump switching valve 3
5, a refrigerant switching valve 36 to the condenser 20 of the hot water regenerator 12;
The throttle device 37 includes a refrigerant supply control valve 38 for the condenser 20 of the hot water regenerator 12 during the heat pump operation, and a refrigerant supply control valve 39 for the heat source coil 7. The atmospheric heat exchanger 5 has a blower 40.

FIG. 6 is a refrigerant circulation system diagram during the heat pump operation when the heat storage air conditioner 6 performs the ice heat storage operation or when the heat storage air conditioner 6 performs the cooling operation using the air conditioning heat source coil 7 due to insufficient heat storage capacity. .

The refrigerant compressed by the compressor 34 exchanges heat with the heat storage material in the refrigerant heat exchanger 23 of the hot water storage device 12 to be liquefied.
The heat enters the heat source coil 7 via the expansion device 37. Heat source fan 9
Is cooled by the air-conditioning heat source coil 7 by the operation, and exchanges heat with the heat storage body 17 of the heat storage air conditioner 6 to circulate again to the heat source fan 9. Thereby, ice heat is stored in the heat storage air conditioner 6.

Here, regarding the operation of the compressor 33, the case where ice heat storage and hot water heat storage are simultaneously terminated. When hot water storage ends earlier than ice storage. Ice storage ends earlier than hot water storage. Cooling operation due to insufficient heat storage capacity of the heat storage air conditioner 6. There are four types.

When the ice heat storage and the hot water heat storage are simultaneously terminated. When the heat storage is completed, the operation of the compressor 34 stops. (The stop signal is performed based on the refrigerant pressure and temperature, but is omitted.)

When the hot water storage ends earlier than the ice storage. When the heat storage temperature of the hot water heat storage device 12 reaches a predetermined temperature (a state in which the amount of exchanged heat is reduced), the blower 40 of the atmospheric heat exchanger 5 is operated, and the refrigerant heat exchanges heat with the atmosphere to liquefy, and the expansion device 2
After that, the air-conditioning heat source coil 7 is entered. When the ice heat storage is completed, the operation of the compressor 34 stops.

When the ice heat storage ends earlier than the hot water heat storage. When the ice heat storage is completed, the operation of the compressor 34 stops. The refrigerant supply control valve 39 to the air-conditioning heat source coil 7 may be closed, the supply of the refrigerant to the air-conditioning heat source coil 7 may be stopped, and the refrigerant circuit may be switched to FIG.

When the cooling operation is performed due to insufficient heat storage capacity of the heat storage air conditioner 6. In this case, the hot water heat storage is the same as the case described above, and the description is omitted.

FIG. 7 is a diagram of a refrigerant circulation system in a heating period, such as a heating period and an intermediate period. Switching from the cooling operation is performed by the refrigerator / heat pump switching valve 35 and the refrigerant switching valve 36. Since the heat storage air conditioner 6 is designed on the basis of ice heat storage that can store latent heat, the heat storage capacity of hot water is small.
The operation at the time of storing hot water is the same as the operation at the time of cooling.

The basic operation of the hot water utilization period is to use heat from the atmosphere. The refrigerant compressed by the compressor 34 enters the air conditioning heat source coil 7. Alternatively, the refrigerant enters the refrigerant heat exchanger 23 of the hot water storage device 12. Liquefies with heat exchange with air or heat storage material. The air enters the atmospheric heat exchanger 5 through the expansion device 37 and is exchanged with the atmosphere by the operation of the blower 40 to be vaporized and circulated again to the compressor 34.

The operation of the compressor 34 in the heating period is set to a heating-priority operation. As a case of operation, the case where the heat storage operation and the heating operation of the heat storage air conditioner 6 are performed. When performing hot water heat storage operation. (The heating operation is stopped.)

When the heat storage operation and the heating operation of the heat storage air conditioner 6 are performed. In this case, the refrigerant supply control valve 38 to the condenser 23 is closed, and the refrigerant supply control valve 39 to the air conditioning heat source coil 7 is opened, and the operation is the same as that in the case of ice heat storage.

When performing hot water heat storage operation. (The heating operation is stopped.) In this case, the refrigerant supply control valve 39 to the air conditioning heat source coil 7 is used.
Is closed, and the refrigerant supply control valve 38 to the condenser 23 is opened. This is the case when the heat storage operation of the heat storage air conditioner 6 is completed.

[0060]

Since the present invention is configured as described above, it has the following effects. 1) Since the heat discarded during cooling is used for hot water supply, thermal efficiency is improved and energy saving can be realized. 2) Leakage of the heat storage air conditioner is eliminated and loss is reduced, so that thermal efficiency is improved. 3) Since the installation of each heat exchanger of the hot water regenerator is performed in consideration of the temperature of the heat storage material, it is useful for effective use of heat and improvement of thermal efficiency. 4) Use of a heat pump for hot water supply saves energy.

[0061]

[Brief description of the drawings]

FIG. 1 is an air conditioning / sanitary heat source system diagram.

FIG. 2 is a detailed configuration diagram of the heat storage air conditioner 2.

FIG. 3 is a view of a cross section taken along the line AA of the heat storage air conditioner 2 viewed in the direction of the arrow.

FIG. 4 is a single view of the heat storage body 16;

FIG. 5 is a detailed configuration diagram of the hot water heat storage device 3.

FIG. 6 is a refrigerant circulation system diagram during a heat pump operation (ice heat storage / cooling operation).

FIG. 7 is a refrigerant circulation system diagram during a heat pump operation (hot water heat storage / heating operation).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat pump 2 air conditioner 3 hot water heat storage device 4 refrigerant pipe 5 air heat exchanger 6 heat storage air conditioner 7 air conditioning heat source coil 8 air supply fan 9 heat source fan 10 filter 11 outside air intake 12 hot water heat storage device 13 midnight power storage device 14 electric heater REFERENCE SIGNS LIST 15 duct 16 heat insulating casing 17 heat storage element 18 damper 19 header 20 thermostat 21 heat storage material 22 void 23 refrigerant heat exchanger 24 hot water supply heat exchanger 25 heat source heat exchanger 26 water pipe 27 hot water supply pipe 28 thermostat (for heat supply) 29 electric valve Reference Signs List 30 heating outgoing pipe connection port 31 heating return pipe connection port 32 thermostat (stop of electric heater 13) 33 thermostat (electricity of electric heater 13) 34 compressor 35 refrigerator / heat pump switching valve 36 refrigerant switching valve 37 expansion device 38 refrigerant supply Control valve 39 Refrigerant supply Control valve 40 blower

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25B 13/00 351 F24D 17/00 T F28D 20/00 F28D 20/00 B

Claims (3)

[Claims] A heat pump having a heat exchanger with the atmosphere, a heat source coil of an air conditioner, and a refrigerant heat exchanger provided below the hot water heat storage device of the hot water heat storage device are connected by a refrigerant pipe, and a heat storage air conditioner in the air conditioner is provided. An air conditioning and hot water supply heat source system for a house or the like, wherein when storing ice in a machine, a refrigerant heat exchanger provided below the hot water storage device serves as a condenser to heat the heat storage material of the hot water storage device. 2. A hot water heat storage device according to claim 1, wherein the hot water heat storage device is provided with a midnight power heat storage device, the heat source heat exchanger is provided on a refrigerant heat exchanger provided below the hot water heat storage device, and the heat storage material of the hot water heat storage device is provided. When the temperature of the house is insufficient, the high-temperature water of the midnight power is sent to the heat source heat exchanger to heat the heat storage material.
Hot water supply heat source system. 3. An air conditioner, in which a heat storage body made of a heat insulating casing is densely disposed inside such that air circulation is ensured, and a plurality of ducts are formed at both ends thereof to form a uniform flow. A heat storage air conditioner provided, wherein a plurality of ducts penetrate only the upper part of the air conditioner, are grouped by a header for each system, and are connected to an external duct.