JPH07174422A - Heat accumulation air-conditioning device - Google Patents

Abstract

PURPOSE:To provide a low-cost heat accumulation air-conditioning device which is constituted to regulate refrigerant amounts of a circuit for general cooling heating and a circuit for dispersing cold and heat are regulatable to respective proper amounts in a short time without mounting a special mechanism for moving a refrigerant, effect no movement between the two circuits after regulation, and perform stable cooling heating operation without the occurrence of a trouble owing to surplus of a refrigerant or deficiency in the refrigerant. CONSTITUTION:A circuit 18 for general cooling and heating driven by a compressor 1 and a circuit 21 for dispersing cold and heat driven by a refrigerant gas pump 13 form respective independent circuits. A heat accumulation air-conditioning device comprises first and second bypass circuits 22 and 23 having first and second opening/ closing devices 22a and 23a, and a control device 27 to control opening and closing of the first and second opening/closing devices 22a and 23a for a counting time of a timer 32 to effect movement of a refrigerant between the circuits. This constitution produces an effect wherein movement of a refrigerant between the circuits is effected in a short time and after movement, both the circuit 18 for general cooling and heating and the circuit 21 for dispersing cold and heat are continuously operated by a proper amount of a refrigerant without surplus of a refrigerant and deficiency in the refrigerant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type air conditioner equipped with a heat storage tank containing a heat storage medium and capable of contributing to leveling of power consumption during the daytime.

[0002]

2. Description of the Related Art FIG.
FIG. 6 is a refrigerant piping system diagram showing a circuit configuration of a conventional heat storage type air conditioner disclosed in Japanese Patent Publication No. The circuit shown in the figure is
A main refrigerant circuit 6 formed by sequentially connecting a compressor 1, a non-use side heat exchanger 2 which is a condenser, a first pressure reducing mechanism 3, and a use side heat exchanger 4 which is an evaporator, and a heat storage medium capable of storing heat. The non-use side heat exchanger 2 to the first decompression mechanism 3 via the heat storage tank 8 containing 7 and the heat exchanger 9a for cold storage which exchanges heat between the heat storage medium 7 of the heat storage tank 8 and the refrigerant. A first bypass circuit 10 that enables the movement of the refrigerant between the liquid side pipe 5a and the gas side pipe 5b, and the liquid side pipe 1 of the first bypass circuit 10
0a, a second depressurizing mechanism 11, a second bypass circuit 12 connected in parallel to the gas side pipe 10b of the first bypass circuit 10, and a second bypass circuit 12 provided in the second bypass circuit 12. A refrigerant gas pump 13 that circulates the refrigerant in order to exchange heat between the heat storage medium 7 stored in the heat storage tank 8 and the refrigerant, and an opening / closing device 14 that controls the amount of the refrigerant flowing into the second bypass circuit 12. It consists of

Next, the operation of this conventional device will be described. Each of the devices denoted by reference numerals 1 to 4 is made to be able to circulate a refrigerant through a refrigerant pipe 5, and is obtained from each of these devices by heat exchange with outdoor air in a non-use side heat exchanger 2. The use-side heat exchanger 4 constitutes a main refrigerant circuit 6 that applies, for example, room air to the refrigerant.

During a normal cooling operation using a compressor (hereinafter referred to as a general cooling operation), the operation is performed with the second decompression mechanism 11 fully closed, and the refrigerant is only in the main refrigerant circuit 6. Circulate. That is, the high-temperature high-pressure gaseous refrigerant discharged from the compressor 1 is condensed in the non-use side heat exchanger 2 and adiabatically expanded in the first pressure reducing mechanism 3 to become a low-temperature gas-liquid two-phase flow. After that, the heat flows into the heat exchanger 4 on the use side, where heat is taken from the surrounding air to cool the surroundings, and the heat is evaporated and vaporized by the compressor 1 itself.
Circulate back to. Further, during a cold storage operation in which cold heat is stored in the heat storage tank 8 (hereinafter, referred to as a cold storage operation) by utilizing a nighttime time period when the power load is small, the operation is performed with the first pressure reducing mechanism 3 fully closed. Done. That is, the gaseous refrigerant discharged from the compressor 1 is condensed into the liquid refrigerant by the non-use side heat exchanger 2, flows into the first bypass circuit 10, and is adiabatically expanded by the second pressure reducing mechanism 11. After that, the heat storage medium 7 in the heat storage tank 8 is evaporated and vaporized by the heat exchanger 9a for cold heat storage.
Store cold heat. The opening and closing device 14 that the refrigerant after evaporation is open
To the compressor 1 via the refrigerant pipe 5.

[0005] Then, in the cooling operation using cold storage (hereinafter referred to as "cooling operation") in which the cold heat previously stored in the heat storage tank 8 is used during the night, for example, in the daytime, the compressor 1 is stopped and the opening / closing device 14 is operated. When the refrigerant gas pump 13 is operated in the closed state, the low-temperature low-pressure gas refrigerant boosted by the refrigerant gas pump 13 becomes the gas side pipe 1 of the first bypass circuit 10.
After passing through 0b, it enters the heat exchanger 9a for cold heat storage to give heat to the heat storage medium 7, and condenses and liquefies itself. Then, the condensed and liquefied refrigerant adiabatically expands in the second decompression mechanism 11, becomes a low-temperature gas-liquid two-phase fluid, and flows into the utilization side heat exchanger 4, where heat is taken from ambient air. By cooling the surrounding area,
It evaporates and vaporizes itself, and returns to the refrigerant gas pump 13 again through the gas side pipe 5b and the second bypass circuit 12. Further, according to this conventional device, the general cooling operation and the cooling operation by the operation of the compressor 1 can be simultaneously performed. That is, the operation is performed in a state where both the compressor 1 and the refrigerant gas pump 13 are operated, and the refrigerant condensed in the non-use side heat exchanger 2 of the main refrigerant circuit 6 and the cold storage heat of the first bypass circuit 10 are used. The refrigerant condensed in the heat exchanger 9a is the main refrigerant circuit 6
The liquid-side pipes 5a merge together, and both of them pass through the first pressure reducing mechanism 3 to evaporate in the utilization-side heat exchanger 4 and circulate so as to cool the surroundings.

The compressor 1 and the refrigerant gas pump 1 shown above
Simultaneous operation 3 of 3, that is, a mixed operation of the general cooling operation and the cooling operation, effectively acts as a load reduction measure for the daytime power demand, but like the conventional device, the non-use side heat exchanger 2 And a method of merging the refrigerants condensed respectively in the heat exchanger 9a for cold storage and evaporating them in the same heat exchanger 4 on the use side, fluctuations in ambient environmental conditions such as indoor air temperature and outdoor air temperature, or heat storage Due to load fluctuations in the heat exchanger 9a for cold storage due to temperature changes of the medium 7, the general cooling circuit side (main refrigerant circuit 6 side) and the cooling circuit side (first, second)
The bypass circuits 11 and 12) may have imbalances in the amount of refrigerant and the amount of refrigerating machine oil required for each. As a result, not only the cooling capacity decreases with the deterioration of the operating condition, but also the high pressure rises due to the excess and deficiency of the amount of refrigerant in each side circuit and liquid back to the compressor 1 (returns to the suction side as liquid refrigerant) There is a risk of directly damaging the components of the refrigerant circuit, such as seizure of the compressor bearing due to depletion of refrigerating machine oil.

Therefore, as a solution to the above problems, the operating capacities of the compressor 1 and the refrigerant gas pump 13 are adjusted so that the condensed refrigerant on the general cooling circuit side and the condensed refrigerant on the cooling circuit side merge. A method of adjusting the flow rate ratio at time can be considered. However, such a method complicates the control method, so that it is necessary to use a relatively expensive control device, and in many cases, it is necessary to increase the number of electric transmission lines to be connected to the control device. Or the compressor 1
Since it is necessary to increase the cost for manufacturing the device due to the need to provide a capacity controller for the refrigerant gas pump 13 and the like, it cannot be said that this is an effective method for application to actual devices. Further, when operating only in the general cooling operation or only in the cooling operation, the refrigerant stagnates in the heat exchanger 9a for cold heat storage, the gas side pipe 5b, or the non-use side heat exchanger 2 (that is, when the operation is stopped relatively, When a large amount of refrigerant stays, the same shall apply hereinafter) and there is a shortage of refrigerant necessary for operation, a refrigerant shortage occurs due to the absence of a refrigerant recovery mechanism. In this case, there is a risk that the operation may be interrupted due to a defect such as insufficient air conditioning capacity and a rise in the temperature of the refrigerant discharged from the compressor 1, and it is difficult to actually apply the device.

[0008]

Since the conventional heat storage type air conditioner is constructed as described above, when the general cooling circuit and the cooling circuit are operated at the same time, subcooling is performed in each circuit. Since the depressurized refrigerant merges and then flows into the use-side heat exchanger 4, the imbalance of the refrigerant amount and the refrigerating machine oil amount between the circuits due to ambient environmental conditions and load fluctuations in the heat exchanger 9a for cold storage heat. There is a problem in that it causes a trouble in continuing driving. In addition, when operating only in the general cooling operation or only in the cooling operation, the refrigerant stored in the heat exchanger 9a for cold heat storage, the gas side pipe 5b, or the non-use side heat exchanger 2 has a refrigerant necessary for operation in the circuit. If there is a bias between
There is a problem that the continuation of operation is hindered due to problems such as insufficient air conditioning capability due to lack of refrigerant recovery mechanism due to the absence of the refrigerant recovery mechanism and increase in discharged refrigerant temperature. Such a problem can be similarly applied to the heat storage type heat storage type air conditioner capable of switching between heating and cooling.

The present invention has been made to solve the above problems, and when operating a general cooling / heating circuit capable of cooling / heating switching and a cooling / radiating circuit simultaneously or individually, Since the refrigerant, etc. is biased to one circuit and the stagnation of the components is eliminated, there are no problems such as damage to the compressor due to excess or deficiency of refrigerant in both circuits and decrease in heating and cooling capacity, and operating costs are low throughout the year The purpose is to obtain a heat storage type air conditioner.

[0010]

In order to achieve the above object, a heat storage type air conditioner according to the present invention comprises a compressor and a first
The four-way switching valve, the non-use side heat exchanger, the first pressure reducing mechanism, and the first use-side heat exchanger are sequentially connected, and the first use is achieved by switching the refrigerant flow path of the first four-way switching valve. A general cooling / heating circuit for freely switching between cooling and heating via a side heat exchanger, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, a second pressure reducing mechanism, and a second utilization side. A heat release / heat radiation circuit that is formed by sequentially connecting heat exchangers, and that freely switches between cooling and heating via the second usage-side heat exchanger by switching the refrigerant flow path of the second four-way switching valve, and a cold storage A heat storage tank with a built-in heat storage medium that stores or stores heat or releases and radiates heat via a heat exchanger for heat, a first gas side pipe of a general cooling and heating circuit, and a second gas side of a cooling and radiating circuit A first switching device provided between the pipe and the refrigerant circuit by opening and closing the first switching device. It has a first bypass circuit that enables movement, and a second switchgear provided between the first liquid-side pipe of the general cooling and heating circuit and the second liquid-side pipe of the cooling / radiating circuit. And a second bypass circuit that enables the refrigerant to move between circuits by opening and closing the second switchgear, and a cooling / radiating circuit that uses heat energy stored in the heat storage tank or stored in the heat storage tank and for general cooling and heating During the cooling operation or the heating operation by either the circuit, or the cooling / radiating circuit or the general heating / cooling circuit, the first opening / closing device and the second opening / closing device are both shut off to form the general cooling / heating circuit. The cooling / radiating circuit is operated independently, and at the time of the cold storage operation or the heat storage operation in the heat storage tank, both the first opening / closing device and the second opening / closing device are opened so that the compressor, 4 way switching valve, non-use side heat exchanger, 1st or Second pressure reducing mechanism,
In a heat storage type air conditioner configured to form a cool storage / heat storage circuit comprising a heat storage heat exchanger for cold storage heat, a timer for measuring a preset predetermined time, and a cooling or heating operation after completion of the cold storage or heat storage operation. Before starting up, either the first and second switchgear, or either the first or second switchgear is opened for a predetermined period of time measured by a timer, and a cooling / radiating circuit and general cooling and heating are used. And a first control device for moving the refrigerant to and from the circuit.

The compressor, the first four-way switching valve, the non-use side heat exchanger, the first decompression mechanism, and the first use side heat exchanger are sequentially connected, and the first four-way switching valve is provided. A general cooling / heating circuit for freely switching between cooling and heating via the first use-side heat exchanger by switching the refrigerant flow path, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, a second The pressure reducing mechanism and the second use side heat exchanger are sequentially connected, and cooling or heating can be freely switched through the second use side heat exchanger by switching the refrigerant flow path of the second four-way switching valve. Cooling / radiating circuit to perform, a heat storage tank that contains a heat storage medium that stores / heats or cools / radiates heat via a heat exchanger for cold storage heat, and the first gas side pipe and cooling of the general cooling / heating circuit・
A first bypass circuit that has a first switchgear provided between the heat dissipation circuit and the second gas side pipe, and that allows the refrigerant to move between circuits by opening and closing the first switchgear, and general cooling and heating Has a second opening / closing device provided between the first liquid side pipe of the cooling circuit and the second liquid side pipe of the cooling / radiating circuit, and moves the refrigerant between circuits by opening / closing the second opening / closing device. And a second bypass circuit that enables the heat storage tank to cool and radiate heat and use the heat energy stored in the heat storage tank, and a general cooling and heating circuit, or a cooling and radiating circuit or a general cooling and heating circuit. At the time of the cooling operation or the heating operation by either one of the above, the first opening / closing device and the second opening / closing device are both shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently. In the cold storage operation or heat storage operation in the heat storage tank, the first A cool storage that is configured by opening both the switchgear and the second switchgear, and including a compressor, a first four-way switching valve, a non-use side heat exchanger, a first or second pressure reducing mechanism, and a heat exchanger for cold heat storage. A heat storage type air conditioner configured to form a heat storage circuit, a refrigerant amount difference detection device for detecting a refrigerant amount difference between a general cooling and heating circuit and a cooling and radiating circuit,
Opening or closing the first opening / closing device and the second opening / closing device or the second opening / closing device based on the refrigerant amount difference detected by the refrigerant amount difference detection device after the cold storage or heat storage operation and before the start of the cooling or heating operation Then, the second control device for moving the refrigerant between the cooling / radiating circuit and the general cooling / heating circuit is provided.

The first four-way switching valve is formed by sequentially connecting the compressor, the first four-way switching valve, the non-use side heat exchanger, the first decompression mechanism, and the first use-side heat exchanger. A general cooling / heating circuit for freely switching between cooling and heating via the first use-side heat exchanger by switching the refrigerant flow path, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, a second The pressure reducing mechanism and the second use side heat exchanger are sequentially connected, and cooling or heating can be freely switched through the second use side heat exchanger by switching the refrigerant flow path of the second four-way switching valve. Cooling / radiating circuit to perform, a heat storage tank that contains a heat storage medium that stores / heats or cools / radiates heat via a heat exchanger for cold storage heat, and the first gas side pipe and cooling of the general cooling / heating circuit・
A first bypass circuit that has a first switchgear provided between the heat dissipation circuit and the second gas side pipe, and that allows the refrigerant to move between circuits by opening and closing the first switchgear, and general cooling and heating Has a second opening / closing device provided between the first liquid side pipe of the cooling circuit and the second liquid side pipe of the cooling / radiating circuit, and moves the refrigerant between circuits by opening / closing the second opening / closing device. And a second bypass circuit that enables the heat storage tank to cool and radiate heat and use the heat energy stored in the heat storage tank, and a general cooling and heating circuit, or a cooling and radiating circuit or a general cooling and heating circuit. At the time of the cooling operation or the heating operation by either one of the above, the first opening / closing device and the second opening / closing device are both shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently. In the cold storage operation or heat storage operation in the heat storage tank, the first A cold storage comprising a compressor, a first four-way switching valve, a non-use side heat exchanger, a first or second pressure reducing mechanism, and a heat exchanger for cold storage heat by opening both the opening / closing device and the second opening / closing device. -In a heat storage type air conditioner configured to form a heat storage circuit, a timer for measuring a preset predetermined time and a timer for the first four-way switching valve after the end of the cold storage operation and before the start of the cooling operation The heat storage operation is performed by switching the timed predetermined time, or after the end of the heat storage operation and before the heating operation is started, the first four-way switching valve is switched for the predetermined time timed by the timer to perform the cold storage operation and then released. A third control device for adjusting the amount of refrigerant between the cooling / radiating circuit and the general cooling / heating circuit is provided.

Further, the compressor, the first four-way switching valve, the non-use side heat exchanger, the first decompression mechanism, and the first use side heat exchanger are sequentially connected, and the first four-way switching valve is provided. A general cooling / heating circuit for freely switching between cooling and heating via the first use-side heat exchanger by switching the refrigerant flow path, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, a second The pressure reducing mechanism, the fourth pressure reducing mechanism, and the second use-side heat exchanger are sequentially connected, and cooling is performed via the second use-side heat exchanger by switching the refrigerant flow path of the second four-way switching valve. Alternatively, a cooling / radiating circuit for freely switching heating and heating, a heat storage tank having a built-in heat storage medium for storing / cooling heat or releasing / radiating heat via a heat exchanger for cold storage heat, and a first cooling / heating circuit First opening / closing provided between the gas side pipe and the second gas side pipe of the cooling / radiating circuit A first bypass circuit that has a storage unit to enable the refrigerant to move between circuits by opening and closing the first switchgear, a first liquid side pipe of a general cooling and heating circuit, and a second cooling and radiating circuit. A second bypass circuit which has a second opening / closing device provided between the liquid side pipe and allows the refrigerant to move between circuits by opening / closing the second opening / closing device, and stores or stores heat in the heat storage tank. The first switchgear in the cooling operation or the heating operation by the cooling / radiating circuit and the general cooling / heating circuit using the heat energy, or the cooling / radiating circuit or the general cooling / heating circuit And the second switchgear are both cut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently of each other, and the first switchgear is operated during the cold storage operation or the heat storage operation in the heat storage tank. And the second
The switchgear of both is opened, and the cold storage / heat storage circuit including the compressor, the first four-way switching valve, the non-use side heat exchanger, the first or second pressure reducing mechanism, and the cold storage heat exchanger is formed. In the heat storage type air conditioner configured to be formed, the fourth pressure reducing mechanism is fully opened immediately before the end of the heat storage operation, and the refrigerant in the second usage-side heat exchanger is caused to flow out to the second liquid-side pipe. It is equipped with a control device.

The compressor, the first four-way switching valve, the non-use side heat exchanger, the first pressure reducing mechanism, and the first use side heat exchanger are sequentially connected, and the first four-way switching valve is provided. A general cooling / heating circuit for freely switching between cooling and heating via the first use-side heat exchanger by switching the refrigerant flow path, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, a second A pressure reducing mechanism, a second use-side heat exchanger, and a second accumulator are sequentially connected, and a third switchgear for connecting the second use-side heat exchanger and the second accumulator is provided, A cooling / radiating circuit for freely switching between cooling and heating via the second utilization side heat exchanger by switching the refrigerant flow path of the second four-way switching valve, and cold storage via the cold storage heat exchanger. A heat storage tank with a built-in heat storage medium that stores heat or releases and radiates heat, and general cooling and heating Cooling the first gas side pipe of the circuit-
A first bypass circuit that has a first switchgear provided between the heat dissipation circuit and the second gas side pipe, and that allows the refrigerant to move between circuits by opening and closing the first switchgear, and general cooling and heating Has a second opening / closing device provided between the first liquid side pipe of the cooling circuit and the second liquid side pipe of the cooling / radiating circuit, and moves the refrigerant between circuits by opening / closing the second opening / closing device. And a second bypass circuit that enables the heat storage tank to cool and radiate heat and use the heat energy stored in the heat storage tank, and a general cooling and heating circuit, or a cooling and radiating circuit or a general cooling and heating circuit. At the time of the cooling operation or the heating operation by either one of the above, the first opening / closing device and the second opening / closing device are both shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently. In the cold storage operation or heat storage operation in the heat storage tank, the first A cool storage that is configured by opening both the switchgear and the second switchgear, and including a compressor, a first four-way switching valve, a non-use side heat exchanger, a first or second pressure reducing mechanism, and a heat exchanger for cold heat storage. -In a heat storage type air conditioner configured to form a heat storage circuit, a timer for measuring a predetermined time set in advance and the first four-way switching valve was timed by the timer immediately after the heat storage operation or the start of the heat storage operation. A fifth control means is provided for performing a cold storage operation by switching for a predetermined time, opening the third switchgear, and causing the refrigerant in the second accumulator to flow out to the second gas side pipe. .

[0015]

In the heat storage type air conditioner according to the present invention, the proper amount of refrigerant is different in each operation mode of the cold storage operation, the heat storage operation, the general cooling operation, the general heating operation, the cooling operation, and the heat radiation operation. For example, the amount of refrigerant required in general cooling operation is relatively small, and conversely, it is large in cooling operation. However, the first
In the cold storage operation in which the bypass circuit and the second bypass circuit are opened, a large amount of refrigerant is unevenly distributed in the non-use side heat exchanger that functions as a condenser, and the second use side of the cold storage heat use that functions as an evaporator. Less in the heat exchanger. Therefore, after the end of the cold storage operation, the first switchgear and the second switchgear are shut off to switch the operation to the general cooling operation and the cooling operation, and when the operation is started, the non-use side heat exchanger is connected. In the general cooling circuit constituted by the above, the refrigerant amount is large and the refrigerant is in a surplus state, while in the cooling circuit formed by connecting the second utilization side heat exchanger, the refrigerant amount is small and the refrigerant is in a shortage state. And
The amount of refrigerant required in the general heating operation is relatively large, and conversely, it is small in the heat radiation operation. However, in the heat storage operation performed by opening the first bypass circuit and the second bypass circuit, a large amount of refrigerant is unevenly distributed in the second heat exchanger on the use side that functions as a condenser, and the non-use side that functions as an evaporator. Less in the heat exchanger. Therefore, when the first switchgear and the second switchgear are shut off after the end of the heat storage operation and the operation is switched to the general heating operation and the cooling operation, the operation is started,
In the general heating circuit that is connected to the non-use side heat exchanger, the amount of refrigerant is small and there is a shortage of refrigerant, while in the cooling circuit that is connected to the second use side heat exchanger, the amount of refrigerant is large. The refrigerant is in a surplus state. Therefore, at the end of the cold storage operation,
Since the cold energy is stored in the heat storage tank at a low temperature, the cooling circuit is balanced at a low pressure, while the general cooling circuit is kept at the saturated pressure at the ambient temperature. Therefore, after the cold storage operation is completed, the first switchgear and the second switchgear are opened by the first control device for a predetermined time predetermined by a timer, so that the refrigerant is released into the low pressure side circuit. The amount of refrigerant is moved between the general cooling circuit and the cooling circuit to adjust the amount of refrigerant, and the excess and deficiency of the refrigerant in both circuits are eliminated, so that an appropriate amount of refrigerant for operation can be secured. Further, when the heat storage operation is switched to the general heating operation and the heat radiation operation, the heat storage medium is kept in a high temperature state. Therefore, the timer controls the first switchgear and the second switchgear for the predetermined time by the first control. By opening it by the device, the refrigerant is moved from the cooling / radiating circuit to the general cooling / heating circuit side, the refrigerant amount is adjusted between the circuits, the excess and deficiency of the refrigerant in both circuits is eliminated, and it is suitable for operation. The amount of refrigerant can be secured.

Further, the opening and closing of the first opening and closing device and the second opening and closing device is not performed by a timer, but, for example, pressure states corresponding to respective refrigerant amounts of the general cooling and heating circuit and the cooling and radiating circuit are set. Based on the pressure difference between the circuits detected by the pressure detection device (refrigerant amount difference detection device) of each circuit, that is, the refrigerant amount difference, the first switchgear and the second switchgear when switching the operation mode, Alternatively, the refrigerant can be moved more appropriately and in a shorter time by opening and closing only the second opening / closing device to move the refrigerant between the circuits. In addition, due to some abnormality, the temperature of the heat storage medium becomes abnormal, the pressure difference between the circuits reverses, and the direction of refrigerant movement becomes opposite, or the failure of the switchgear makes it impossible to move the refrigerant between circuits. It is possible to detect in advance such as a malfunction based on the detected pressure difference.

Further, when the operation is switched from the cold storage operation to the general cooling operation by utilizing the difference in the refrigerant distribution in the cold storage operation and the heat storage operation as described above, the heat storage operation is preliminarily measured by a timer after the cold storage operation is completed. A second control functioning as a condenser in the heat storage operation is performed by the third control device for a predetermined time (that is, a time that does not affect the heat storage amount), after which the heat storage operation is terminated and switched to the cooling operation. While a large amount of refrigerant is distributed to the heat exchanger on the use side, the distribution amount is small on the heat exchanger on the non-use side that functions as an evaporator. Therefore, the first switchgear and the second switchgear are shut off, and general cooling is performed. When the operation and the cooling operation are started, the amount of refrigerant is relatively small on the general cooling circuit side, and conversely, a relatively large amount of refrigerant is distributed to the cooling circuit. This allows
Since the amount of refrigerant required for general cooling is small and the amount of refrigerant required for cooling operation is large, the operation can be continued with an almost appropriate refrigerant distribution. When the operation is switched from the heat storage operation to the cold storage operation, after the end of the heat storage operation, the cool storage operation is performed by the third control device for a predetermined time (that is, a time that does not affect the heat storage amount) by the timer. By operating and then ending the cold storage operation and switching to the heating operation, a large amount of refrigerant is distributed to the non-use side heat exchanger that functions as a condenser in the cold storage operation, while the second use side heat that functions as an evaporator. Since the distribution amount is small in the exchanger,
When the general heating operation and the heat radiation operation are started by shutting off the first switchgear and the second switchgear, the amount of refrigerant is relatively large on the general heating circuit side, and conversely on the heat radiation circuit side. A very small amount of refrigerant is distributed. As a result, since the required amount of refrigerant for general cooling is large and the required amount of refrigerant for cooling operation is small, the operation can be continued with an almost appropriate refrigerant distribution.

Further, while a large amount of refrigerant is distributed on the side of the second heat exchanger on the use side that functions as a condenser during heat storage operation, that is, on the side of the heat radiation circuit, the amount of refrigerant required in heat radiation operation is relatively small. When the operation is switched from the cold storage operation to the heat radiation operation,
There is a possibility that the operation will not be able to continue due to problems such as excessive refrigerant in the heat dissipation operation, a rise in high pressure, and liquid back to the compressor suction side. Further, in the heat storage operation, the refrigerant is laid as a liquid refrigerant in the second heat exchanger on the utilization side, which causes an excess of the refrigerant at the start of the heat radiation operation, and therefore needs to be recovered in advance. Therefore, the fourth pressure reducing mechanism is fully opened by the fourth control device immediately before the end of the heat storage operation, and the refrigerant is discharged to the second liquid side by utilizing the pressure difference between the discharge pressure and the condensation pressure of the refrigerant on the compressor outlet side. Collect in the pipe and finish the cold storage operation. As a result, when the heat radiation operation is started up, the operation can be smoothly continued without causing a problem due to excess refrigerant.

If the refrigerant accumulates in the second accumulator after the heat dissipation operation on the previous day, the maximum amount of refrigerant is required for the heat storage operation, and therefore, the fifth control device immediately after the start of the heat storage operation. Performs a reverse operation (cold storage operation) for a predetermined time counted by a timer, and at the same time opens a third switchgear provided between the second accumulator and the second utilization side heat exchanger, By performing the control of taking out and distributing the refrigerant lying in the accumulator of No. 2, it is possible to shift to the heat storage operation promptly and without trouble after taking out the refrigerant. In addition, by performing this refrigerant distribution operation within a preset predetermined heat storage time, the heat radiation operation is continued without causing a refrigerant excess problem due to the refrigerant laid in the second accumulator at the start of the heat radiation operation on the next day. Can be made.

[0020]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 shows a first embodiment, a third embodiment, which are applied in correspondence with the inventions of claim 1, claim 3, and claim 4, respectively.
It is a refrigerant piping system diagram showing the whole heat storage type air harmony device composition by Example 4. In the figure, 1 is a compressor, 2 is heat exchange between, for example, outdoor air and a refrigerant, a non-use side heat exchanger 3 is a first pressure reducing mechanism, 4a is a first use side heat exchanger, 1
Reference numeral 7 denotes a first accumulator, which is sequentially connected to form a compressor-utilizing cooling / heating circuit (hereinafter, referred to as a general cooling / heating circuit) 18 through the first utilization-side heat exchanger 4a. For example, the room is cooled or heated. Then, the general cooling and heating circuit 18 is
The switchgear 16a is connected to the first utilization side heat exchanger 4a.
And a bypass circuit 3b connected in parallel to the inlet / outlet side of the first pressure reducing mechanism 3 and including a switchgear 3a.

On the other hand, 13 is a refrigerant gas pump, 9 is a heat exchanger for cold storage heat, 20 is a second pressure reducing mechanism, 4b is a second utilization side heat exchanger, and 13a is a second accumulator.
These are connected in sequence to form a cooling / heating circuit (hereinafter referred to as a cooling / radiating circuit) 21 that uses the accumulated heat, and is used for cooling the inside of the room, for example, through the second heat exchanger 4b on the use side. It is designed to heat. Further, 7 is a heat storage medium for storing or storing heat via the heat exchanger 9 for heat storage for cold storage, and 8 is a heat storage tank containing the heat storage medium 7 therein.
As the heat storage medium 7, for example, water is used. As the heat storage means in this case, most of the cold heat is stored as latent heat by ice making at the time of cold storage, and at the time of heat storage, it is sufficient to start up until a steady heating operation is reached. It is realized by storing the amount of sensible heat as hot water. Further, 11 is the second utilization side heat exchanger 4b.
Is a fourth depressurizing mechanism which is connected in parallel with a bypass circuit 11b including a switchgear 11a. The second depressurization mechanism 20 is configured such that a bypass circuit 20b including an opening / closing device 20a is connected in parallel to the inlet / outlet side thereof. In addition, the first usage-side heat exchanger 4a and the second usage-side heat exchanger 4 described above.
b is provided in each independent refrigerant circuit,
Both of them are collectively referred to as a utilization side heat exchanger 4, but the respective heat exchange portions may be provided in either a common air passage or an individually independent air passage.

Reference numeral 22 denotes a first gas side pipe 18b between the first four-way switching valve 15 and the first utilization side heat exchanger 4a and a second four-way switching valve 19 between the second utilization side heat exchanger 4b. It is a first bypass circuit that enables the movement of the refrigerant between the two circuits by opening and closing the first opening / closing device 22a interposed between the first side opening / closing device 22a and the gas side pipe 21b. Reference numeral 23 denotes the first liquid side pipe 18a between the first pressure reducing mechanism 3 to the third pressure reducing mechanism 16 and the second pressure reducing mechanism 20 to.
It is a second bypass circuit that enables the movement of the refrigerant in both circuits by opening / closing a second opening / closing device 23a interposed between the second pressure reducing mechanism 11 and the second liquid side pipe 21a. These bypass circuits 22 and 23 are used as a part of the main refrigerant circuit during cold storage operation or heat storage operation.

Reference numeral 24 is a fifth bypass circuit including an opening / closing device 24a in parallel between the inlet and outlet of the refrigerant gas pump circuit including the refrigerant gas pump 13 and the second four-way switching valve 19, and 27 is a heat storage type air conditioner. A control device for controlling various operations of the switch, 28 is an opening / closing device provided in the first gas side pipe 18b near the first utilization side heat exchanger 4a, 29
Is an opening / closing device provided in the second gas side pipe 21b near the second utilization side heat exchanger 4b, and 32 is a timer of the control device 27 for measuring a predetermined control operation time.

FIG. 2A shows the distribution of the amount of refrigerant at the end of the cold storage operation of the heat storage type air conditioner according to the first embodiment of the present invention and the required amount of refrigerant in the general cooling circuit and the cooling air circuit. Further, FIG. 2B shows a refrigerant moving direction when the first opening / closing device and the second opening / closing device are opened. At the end of the cold storage operation, the non-use side heat exchanger 2 side that functions as a condenser,
That is, while the refrigerant amount V ₁ (kg) of refrigerant is present on the side of the general cooling circuit, the amount of refrigerant is on the side of the second utilization side heat exchanger 4b used for cold storage that functions as an evaporator, that is, on the side of the cooling circuit. V ₂
There is (kg) refrigerant (at this time, V ₁ > V ₂ ).
The necessary refrigerant amounts required for normal operation in the general cooling circuit or the cooling circuit are Vr and Vhr (kg), respectively.
, V ₁ −Vr (= Vhr−V ₂ ) (k
The movement of the amount of refrigerant in g) is necessary for normal operation.

FIG. 3A shows the distribution of the amount of refrigerant at the end of the heat storage operation and the required amount of refrigerant in the general heating circuit and the heat radiation circuit. Further, FIG. 3B shows the refrigerant moving direction when the first opening / closing device and the second opening / closing device are opened. At the end of the cold storage operation, the second heat storage utilization that functions as a condenser
While there is a refrigerant amount V ₃ (kg) of refrigerant on the utilization side heat exchanger 4b side, that is, the heat radiation operation circuit side, the non-use side heat exchanger 2 side that functions as an evaporator, that is, the general heating circuit side A refrigerant having a refrigerant amount of V ₄ (kg) is present (at this time, V
₃ > V ₄ ). The necessary refrigerant amounts required for normal operation in the general heating circuit or heat dissipation circuit are Vd and V, respectively.
If it is hn (kg), V ₃ −Vhn (= Vd−
The transfer of the refrigerant amount of V ₄ ) (kg) is necessary for normal operation.

FIG. 4 shows a control flow according to the first embodiment. In the figure, S1, S2, S3, ... Represent operation steps by the control device 27, respectively, and the same applies to control flows used in other embodiments described below. After the cool storage / heat storage operation time ends (S
1), the control device 27 (first control device) uses the timer 3
The second opening / closing device 23a is opened for 5 minutes which is timed by 2 (S2 to S4), and a necessary amount of refrigerant is moved between the general cooling and heating circuit and the cooling / radiating circuit during this period. The second opening / closing device 23 is activated by the timer 32 when the timing is completed.
A is closed and the circuits are cut off (S5) to complete the transfer of the refrigerant. After the completion of the movement of the refrigerant, the general cooling / heating operation and the cooling / radiating operation are started (S6, S7).

Regarding the above operation, FIG.
For example, it shows the relationship between the opening time of the first switchgear and the second switchgear and the amount of refrigerant movement when the heat storage medium is 0 ° C. For example, the heat storage medium 7 is 40
When the heat is stored at a high temperature of ℃, the first switchgear 22a
And the relationship between the opening time of the second opening / closing device 23a and the refrigerant movement amount. Due to this relationship, the time data necessary for the movement of the refrigerant between the circuits is previously input to the memory circuit (not shown) of the control device 27, and the control device 27 measures the time of the timer 32 based on the time data, and here the second data is used. The open / close control of the open / close device 23a is performed. The second opening / closing device 2 in which liquid refrigerant is present during operation
Controlling the opening and closing of 3a is effective for the movement of the refrigerant between the circuits, but the first opening and closing device 22 in which the gas refrigerant exists
If a is opened and closed at the same time as the second opening / closing device 23a, the refrigerant can be moved more quickly.

Example 2. Example 2 of the present invention will be described below with reference to FIG.
~ It demonstrates based on FIG. In FIG. 6, the same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. FIG. 6 is an overall configuration diagram of a heat storage type air conditioner according to a second embodiment to which the invention of claim 2 is applied. In the figure, 30 is a pressure detection device that detects the pressure corresponding to the refrigerant balance state when the general cooling and heating circuit is stopped, and 31 is a pressure detection device that detects the pressure corresponding to the refrigerant balance state of the cooling / radiating circuit. Is. The means for detecting the refrigerant balance state in each circuit when the operation is stopped (refrigerant amount difference detecting means) is not limited to the above pressure detecting device,
For example, it is possible to use a temperature detecting device for each circuit. Further, the refrigerant distribution and the amount of the refrigerant have been already described in the first embodiment shown in FIGS.

FIG. 7 shows a control flow according to the second embodiment. First, when the controller 27 (second controller) detects the end of the cold storage / heat storage operation (S1).
1), and after 5 minutes from that time (S12), the saturation pressure P ₁ , respectively in the general cooling and heating circuit and the cooling and radiating circuit
P ₂ is detected by the pressure detection devices 30 and 31 (S1
3). If there is no pressure difference between the circuits (P in S13,
₁ -P ₂ = 0), and outputs a detection signal as an abnormality in the breakdown or the refrigerant circuit of the switchgear or the like (S14). Meanwhile, P ₁ -P ₂ of after confirming that the pressure difference exists (S13>
0 or P ₁ -P ₂ <0), the second switchgear 23a is opened (S15), and the refrigerant is moved between the circuits. After it is determined that the refrigerant having the predetermined movement amount calculated by the arithmetic unit (not shown) of the control device 27 is completed (S1
6), the control device 27 closes the second opening / closing device 23a to interrupt the circuits (S17), and ends the refrigerant movement. After the completion of the transfer of the refrigerant, the general cooling / heating operation and the cooling / radiating operation are started (S18, S19).

Regarding the above operation, FIG. 8 shows the pressure Pi (kg / cm ² ) obtained based on the detected pressure or temperature detected value in the general cooling and heating circuit and the detected pressure or temperature detected value in the cooling / radiating circuit. Based on the obtained pressure Ph (kg / c
m ² ) and pressure difference (= Pi-Ph (kg / cm ² ))
And the amount of refrigerant movement per unit time (kg / min). When the second switching device 23a is opened by the control device 27, the pressure difference between the two circuits gradually decreases and tends to become uniform, so the pressure changes depending on the opening / closing time of the second switching device 23a. This relationship is stored in advance in a storage device (not shown) of the control device 27, and an arithmetic device (not shown) for calculating the refrigerant movement amount based on the above relationship is incorporated into the control device 27 for control.
It is effective to control the opening / closing of the second opening / closing device 23a in which the liquid refrigerant is present during operation, which is effective for the refrigerant movement between the circuits, but the first opening / closing device 22a in which the gas refrigerant is present is set to the second opening / closing device 22a. If the opening / closing device 23a is opened and closed at the same time,
The refrigerant can be moved more quickly.

Example 3. Example 3 of the present invention will be described below with reference to FIG.
It will be described based on. The same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. Figure 9
Shows a control flow according to the third embodiment. For example, after the end of the cold storage operation (S21), the control device 27 (third control device) performs the heat storage operation for 15 minutes (S22 to S2).
4) The heat storage operation is ended (S25). After the completion of the cold storage operation, the general cooling operation and the cooling operation are started (S26,
S27). In the winter, after the heat storage operation ends, the cold storage operation is performed for 15 minutes, the operation is ended and the refrigerant amount distribution adjustment between the circuits is performed, and then the general heating operation and the heat radiation operation are started.

By these operations, the refrigerant amount distribution at the end of the cold storage operation is such that the refrigerant amount in the general cooling circuit changes from V ₁ to V ₃ and the refrigerant amount in the cooling circuit changes from V ₂ to V ₄ , and the cooling operation is performed. When switching, the amount of refrigerant in each circuit is V ₃ = V
Since r and V ₄ = Vhr, an appropriate amount of refrigerant can be secured, and the refrigerant can be operated without excess or deficiency even after the operation is switched. The refrigerant quantity distribution at the time of heat storage operation terminates, the refrigerant amount of general heating circuit is a V ₃ to V _1, the amount of the refrigerant cooling circuit is V ₂ from V _4. Further, when the operation is switched to the heating operation, the amounts of refrigerant in each circuit are V ₁ = Vd and V ₂ = Vhn, respectively, so that an almost proper amount of refrigerant can be secured, and the refrigerant remains after the operation is switched. You can drive without excess or deficiency.

Example 4. Example 4 of the present invention will be described below with reference to FIG.
A description will be given based on 0. The same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. FIG. 10 shows a control flow according to the fourth embodiment.
When the heat storage operation is performed (S31), the control device 27
(Fourth control device) 5 minutes before the end of the heat storage operation (S32,
S33), the fourth pressure reducing mechanism 11, for example, the linear expansion valve is fully opened (S34), and the liquid refrigerant lying in the second utilization side heat exchanger 4b is taken out and 5 minutes later (S35, YES).
It is fully closed (S36), and the heat storage operation is ended. Then, the general heating operation and the cooling operation are started (S37, S3).
8).

Example 5. Example 5 of the present invention will be described below with reference to FIG.
1 to 12 will be described. FIG. 11 is a refrigerant piping system diagram showing an overall configuration of a heat storage type air conditioner according to a fifth embodiment to which the invention of claim 5 is applied. In FIG. 11, 1 is a compressor, 2 is a non-use side heat exchanger that performs heat exchange between, for example, outdoor air and a refrigerant, 3 is a first pressure reducing mechanism, 4a is a first use side heat exchanger, Reference numeral 17 denotes a first accumulator, which is sequentially connected to form a compressor-utilizing cooling / heating circuit (hereinafter, referred to as a general cooling / heating circuit) 18 and, for example, via the first utilization-side heat exchanger 4a. Cool or heat the room. The general cooling and heating circuit 18 is connected to the first utilization side heat exchanger 4a and is parallel to the bypass circuit 16b including the switchgear 16a.
A bypass circuit 3b that is connected in parallel to the inlet / outlet side of the first pressure reducing mechanism 3 and includes a switchgear 3a is provided. on the other hand,
13 is a refrigerant gas pump, 9 is a heat exchanger for cold storage heat, 20 is a second pressure reducing mechanism, 4b is a second heat exchanger on the use side, and 25 is a third switchgear which is opened only during cooling / radiating operation. 1
Reference numeral 3a is a second accumulator, which is sequentially connected to each other to cool and heat the cold storage circuit (hereinafter, referred to as a cooling / radiating circuit).
21 of the second user side heat exchanger 4b.
For example, the room is cooled or heated through the. Further, 26 is an opening / closing device which is interposed between the second four-way switching valve 19 and the heat exchanger 9 for cold heat storage and is controlled to be opened / closed simultaneously with the third opening / closing device 25.

Reference numeral 7 is a heat storage medium that stores or stores heat via the heat exchanger 9 for cold storage heat, and 8 is a heat storage tank containing the heat storage medium 7. For example, water is used as the heat storage medium 7. The heat storage means in this case is realized by storing most of the cold heat as latent heat by ice making during cold storage, and as sensible heat sufficient for startup until reaching a steady heating operation as hot water during heat storage. Further, 11 is connected to the second utilization side heat exchanger 4b, and the switchgear 11a
Is a fourth depressurizing mechanism formed by arranging in parallel the bypass circuits 11b including the. The second decompression mechanism 20 has a bypass circuit 20b including an opening / closing device 20a connected in parallel on the inlet / outlet side thereof. The first usage-side heat exchanger 4a and the second usage-side heat exchanger 4b are respectively provided in independent refrigerant circuits, and both are collectively referred to as a usage-side heat exchanger 4, Each heat exchange part is in the common air passage,
Alternatively, it may be provided in any of the individual air passages.

Reference numeral 22 denotes a first gas side pipe 18b between the first four-way switching valve 15 and the first usage-side heat exchanger 4a, and a second four-way switching valve 19-second usage-side heat exchanger 4b. First switchgear 22 interposed between the second gas side pipe 21b
It is a first bypass circuit that enables the refrigerant to move between both circuits by opening and closing a. Reference numeral 23 denotes a first liquid side pipe 18a between the first pressure reducing mechanism 3 to the third pressure reducing mechanism 16 and a second liquid side pipe 21a between the second pressure reducing mechanism 20 to the fourth pressure reducing mechanism 11.
It is a second bypass circuit that enables the movement of the refrigerant in both circuits by opening and closing the second opening / closing device 23a interposed between and. These bypass circuits 22 and 23 are used as a part of the main refrigerant circuit during cold storage operation or heat storage operation.

Reference numeral 24 is a fifth bypass circuit provided in parallel with the opening / closing device 24a between the inlet and outlet of the refrigerant gas pump circuit including the refrigerant gas pump 13 and the second four-way switching valve 19, and 27 is the heat storage air conditioner. A control device for controlling various operations of the device, 28 is the first utilization side heat exchanger 4a.
A switchgear provided on the first gas side pipe 18b in the vicinity,
Reference numeral 29 is an opening / closing device provided in the second gas side pipe 21b near the second utilization side heat exchanger 4b, and 32 is a timer of the control device 27 that measures a predetermined control operation time.

FIG. 12 shows a control flow according to the fifth embodiment. Since the maximum amount of refrigerant is required for the heat storage operation, if the refrigerant lays in the second accumulator 13a after the heat dissipation operation on the previous day, the refrigerant reverse operation (cold operation) is performed immediately after the heat storage operation starts, At the same time, it is necessary to open the third opening / closing device 25 for a certain period of time and take out the laid refrigerant from the second accumulator 13a. Therefore, the control device 27 (fifth control device) performs the cold storage operation immediately after the start of the heat storage operation (S41) (S42), and further, the third opening / closing device 25 is clocked by the timer 32 30.
By opening for a minute (S43, S44), the second accumulator 13a becomes the suction side of the compressor 1 from the second accumulator 13a.
After taking out the refrigerant to the gas side pipe 21b side, the heat storage operation is started.

[0039]

As described above, according to the present invention, the first control device clocks the first opening / closing device and the second opening / closing device of the general cooling / heating circuit and the cooling / radiating circuit by the timer. Open for a specified time. As a result, due to the pressure difference between the refrigerant saturation pressure at the heat storage medium temperature and the refrigerant saturation pressure at the ambient environment temperature on the non-use side, the refrigerant is moved between circuits between the cooling / radiating circuit and the general cooling / heating circuit. Since the amount of refrigerant between the circuits is adjusted by adjusting the amount of refrigerant between the circuits, neither the cooling / radiating circuit nor the general cooling / heating circuit at the time of startup of the cooling or heating operation has a problem due to excess or insufficient refrigerant There is an effect that it is possible to drive with secured. Moreover, since it is not necessary to separately provide a special refrigerant moving mechanism (for example, a refrigerant moving circuit), an inexpensive heat storage type air conditioner can be obtained.

Further, the refrigerant amount difference detection device detects the refrigerant amount difference between the circuits based on the pressure difference or temperature difference detected on the general cooling and heating circuit side and the cooling / radiating circuit side, respectively. Since the second control device moves the refrigerant between the circuits before switching the operation mode based on the refrigerant amount difference detected by the refrigerant amount difference detection device, the refrigerant movement can be performed more accurately and in a short time. Instead, it is possible to detect a defect in each circuit in advance.

Further, when switching from the cold storage operation to the cooling operation, the third control device is considered in consideration of the difference in the refrigerant amount distribution between the general cooling / heating circuit and the cooling / radiating circuit during the cold storage operation or the heat storage operation. After the end of the cold storage operation, but before the start of the cooling operation, for example, after switching to the cooling operation after performing the heat storage operation for a predetermined time that does not affect the heat storage amount, it is a mere refrigerant reverse flow operation with respect to the cooling operation. It is possible to obtain an inexpensive heat storage type air conditioner capable of adjusting the amount of refrigerant between the circuits in a relatively short time by a simple control that simply performs.

Further, immediately before the end of the heat storage operation, the fourth control means fully opens the fourth pressure reducing mechanism to allow the refrigerant in the second heat exchanger on the heat dissipation side to flow out to the second liquid side pipe. Therefore, there is no problem such as high pressure rise due to excess refrigerant and liquid back to the compressor when the operation is switched from the heat storage operation to the heat dissipation operation, and the operation can be smoothly continued.

Even when the liquid refrigerant remains in the second accumulator at the end of the heat radiation operation, the fifth control device performs the cold storage operation (refrigerant backflow operation for the heat storage operation) immediately after the heat storage operation starts. Since the opening / closing device of 3 is opened to allow the refrigerant in the second accumulator to flow out to the second gas side pipe, the actual operation of the heat storage operation is started, so that the amount of refrigerant required for the heat storage operation is ensured. The actual operation can be started.

[Brief description of drawings]

FIG. 1 is a refrigerant piping system diagram of a heat storage type air conditioner according to first, third, and fourth embodiments of the present invention.

FIG. 2 (a) is a diagram showing a refrigerant amount distribution at the end of the cold storage operation of the heat storage type air conditioner according to the first embodiment of the present invention and a required amount of refrigerant in the general cooling / heating circuit and the cooling air circuit. (B) is a diagram showing a refrigerant flow in a refrigerant adjustment operation of the heat storage type air conditioner according to the first embodiment of the present invention.

FIG. 3A is a diagram showing a refrigerant flow and a refrigerant amount distribution during a heating operation of the heat storage type air conditioner according to the first embodiment of the present invention. (B) is a diagram showing the flow of the refrigerant during the refrigerant adjustment operation of the heat storage type air conditioner according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a control flowchart of a refrigerant adjustment operation of the heat storage type air conditioner according to the first embodiment of the present invention.

FIG. 5 is a diagram showing the relationship between the amount of refrigerant movement of the heat storage type air conditioner according to the first embodiment of the present invention and the opening / closing time of the switchgear.

FIG. 6 is a refrigerant piping system diagram of a heat storage type air conditioner according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a control flowchart of a refrigerant adjusting operation of the heat storage type air conditioner according to the second embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between a refrigerant movement amount and a pressure difference between circuits necessary for movement of the heat storage type air conditioner according to the second embodiment of the present invention.

FIG. 9 is a diagram showing a control flowchart of a refrigerant adjustment operation of the heat storage type air conditioner according to the third embodiment of the present invention.

FIG. 10 is a diagram showing a control flowchart of a refrigerant adjustment operation of the heat storage type air conditioner according to Example 4 of the present invention.

FIG. 11 is a refrigerant piping system diagram of a heat storage type air conditioner according to a fifth embodiment of the present invention.

FIG. 12 is a diagram showing a control flowchart of a refrigerant adjustment operation of the heat storage type air conditioner according to Example 5 of the present invention.

FIG. 13 is a refrigerant piping system diagram of a conventional heat storage type air conditioner.

[Explanation of symbols]

 1 Compressor 2 Non-use side heat exchanger 3 Decompression mechanism 4 Use side heat exchanger 4a First use side heat exchanger 4b Second use side heat exchanger 7 Heat storage medium 8 Heat storage tank 9 Heat exchanger for cold storage heat 11 4th decompression mechanism 13 Refrigerant gas pump 13a 2nd accumulator 15 1st four-way switching valve 16 3rd decompression mechanism 18 Compressor using heating / cooling circuit (general cooling / heating circuit) 18b 1st gas side piping 19 2nd Four-way switching valve 20 Second decompression mechanism 21 Cooling / heating circuit (cooling / radiating circuit) utilizing stored heat 21b Second gas side piping 22 First bypass circuit 22a First switchgear 23 Second bypass circuit 23a 2 switchgear 25 3rd switchgear 27 control device 30 pressure detection device 31 pressure detection device 32 timer

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location F25B 13/00 U 351 (72) Inventor Masami Imanishi 6-5-6 Tehira, Wakayama Mitsubishi Electric Incorporated company Wakayama Works

Claims (5)

[Claims] 1. A first four-way switching system comprising a compressor, a first four-way switching valve, a non-use side heat exchanger, a first pressure reducing mechanism, and a first use side heat exchanger, which are sequentially connected. A general cooling / heating circuit for freely switching between cooling and heating through the first utilization side heat exchanger by switching the refrigerant flow path of the valve, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, Second
The pressure reducing mechanism and the second use side heat exchanger are sequentially connected, and cooling or heating is switched through the second use side heat exchanger by switching the refrigerant flow path of the second four-way switching valve. A heat release / heat radiation circuit that is freely performed, a heat storage tank that incorporates a heat storage medium that stores or releases heat or cools / radiates heat via the heat storage heat exchanger, and the first gas side of the general cooling / heating circuit A first opening / closing device provided between the pipe and the second gas side pipe of the cooling / radiating circuit, wherein the opening / closing of the first opening / closing device enables movement of the refrigerant between circuits; And a second opening / closing device provided between the first liquid side pipe of the general cooling / heating circuit and the second liquid side pipe of the cooling / radiating circuit. A second bypass circuit that allows the refrigerant to move between circuits by opening and closing the switchgear; In the cooling operation or the heating operation by the cooling / radiating circuit and the general cooling / heating circuit, or the cooling / radiating circuit or the general cooling / heating circuit that uses the heat energy stored or stored in the The first switchgear and the second switchgear are both shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently of each other, and the cold storage operation or heat storage in the heat storage tank is performed. During operation, both the first switchgear and the second switchgear are opened, and the compressor, the first four-way switching valve, the non-use side heat exchanger, the first or the second pressure reducing mechanism. In a heat storage type air conditioner configured to form a heat storage / heat storage circuit including a heat storage heat storage heat exchanger, a timer for measuring a preset predetermined time and cooling or heating after the end of the heat storage or heat storage operation. Before launching the rolling,
The first and second switchgear, or either the first or second switchgear, is opened for a predetermined period of time measured by the timer, and the cooling / radiating circuit and the general cooling / heating circuit are opened. And a first control device for moving the refrigerant between the heat storage type air conditioning device and the first control device. 2. A first four-way switching system comprising a compressor, a first four-way switching valve, a non-use side heat exchanger, a first pressure reducing mechanism, and a first use side heat exchanger, which are sequentially connected. A general cooling / heating circuit for freely switching between cooling and heating through the first utilization side heat exchanger by switching the refrigerant flow path of the valve, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, Second
The pressure reducing mechanism and the second use side heat exchanger are sequentially connected, and cooling or heating is switched through the second use side heat exchanger by switching the refrigerant flow path of the second four-way switching valve. A heat release / heat radiation circuit that is freely performed, a heat storage tank that incorporates a heat storage medium that stores or releases heat or cools / radiates heat via the heat storage heat exchanger, and the first gas side of the general cooling / heating circuit A first opening / closing device provided between the pipe and the second gas side pipe of the cooling / radiating circuit, wherein the opening / closing of the first opening / closing device enables movement of the refrigerant between circuits; And a second opening / closing device provided between the first liquid side pipe of the general cooling / heating circuit and the second liquid side pipe of the cooling / radiating circuit. A second bypass circuit that allows the refrigerant to move between circuits by opening and closing the switchgear; In the cooling operation or the heating operation by the cooling / radiating circuit and the general cooling / heating circuit, or the cooling / radiating circuit or the general cooling / heating circuit that uses the heat energy stored or stored in the The first switchgear and the second switchgear are both shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently of each other, and the cold storage operation or heat storage in the heat storage tank is performed. During operation, both the first switchgear and the second switchgear are opened, and the compressor, the first four-way switching valve, the non-use side heat exchanger, the first or the second pressure reducing mechanism. In the heat storage type air conditioner configured to form a cold storage / heat storage circuit comprising a heat storage heat exchanger for cold storage, and a refrigerant amount for detecting a difference in refrigerant amount between the general cooling / heating circuit and the cooling / radiating circuit. Difference detector and cold storage Or the first opening / closing device and the second opening / closing device, or the second opening / closing device based on the refrigerant amount difference detected by the refrigerant amount difference detection device after the heat storage operation and before the start of the cooling or heating operation. A heat storage type air conditioner comprising: a second control device that opens and closes the device to move the refrigerant between the cooling / radiating circuit and the general cooling / heating circuit. 3. A first four-way switch comprising a compressor, a first four-way switching valve, a non-use side heat exchanger, a first pressure reducing mechanism, and a first use side heat exchanger, which are sequentially connected. A general cooling / heating circuit for freely switching between cooling and heating through the first utilization side heat exchanger by switching the refrigerant flow path of the valve, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, Second
The pressure reducing mechanism and the second use side heat exchanger are sequentially connected, and cooling or heating is switched through the second use side heat exchanger by switching the refrigerant flow path of the second four-way switching valve. A heat release / heat radiation circuit that is freely performed, a heat storage tank that incorporates a heat storage medium that stores or releases heat or cools / radiates heat via the heat storage heat exchanger, and the first gas side of the general cooling / heating circuit A first opening / closing device provided between the pipe and the second gas side pipe of the cooling / radiating circuit, wherein the opening / closing of the first opening / closing device enables movement of the refrigerant between circuits; And a second opening / closing device provided between the first liquid side pipe of the general cooling / heating circuit and the second liquid side pipe of the cooling / radiating circuit. A second bypass circuit that allows the refrigerant to move between circuits by opening and closing the switchgear; In the cooling operation or the heating operation by the cooling / radiating circuit and the general cooling / heating circuit, or the cooling / radiating circuit or the general cooling / heating circuit that uses the heat energy stored or stored in the The first switchgear and the second switchgear are both shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently of each other, and the cold storage operation or heat storage in the heat storage tank is performed. During operation, both the first switchgear and the second switchgear are opened, and the compressor, the first four-way switching valve, the non-use side heat exchanger, the first or the second pressure reducing mechanism. In a heat storage type air conditioner configured to form a heat storage / heat storage circuit composed of a heat storage heat exchanger for heat storage, and a timer for measuring a predetermined time set in advance, and before the start of the cooling operation after the end of the cold storage operation. To the above The four-way switching valve No. 1 is switched for a predetermined time period counted by the timer to perform the heat storage operation, or the first four-way switching valve is clocked by the timer after the end of the heat storage operation and before the heating operation is started. Switch only the time to perform cold storage operation,
A heat storage type air conditioner comprising a third control device for adjusting the amount of refrigerant between the cooling / radiating circuit and the general cooling / heating circuit. 4. A compressor, a first four-way switching valve, a non-use side heat exchanger, a first pressure reducing mechanism, and a first use side heat exchanger, which are sequentially connected, and the first four-way switching is provided. A general cooling / heating circuit for freely switching between cooling and heating through the first utilization side heat exchanger by switching the refrigerant flow path of the valve, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, Second
The pressure reducing mechanism, the fourth pressure reducing mechanism, and the second use-side heat exchanger are sequentially connected, and the refrigerant flow passage switching of the second four-way switching valve causes the second use-side heat exchanger to pass through. Cooling / radiating circuit for freely switching between heating and cooling, a heat storage tank having a built-in heat storage medium for storing / heating heat or releasing / radiating heat via the heat storage heat exchanger, and the general cooling / heating circuit Has a first opening / closing device provided between the first gas side pipe and the second gas side pipe of the cooling / radiating circuit, and moves the refrigerant between circuits by opening / closing the first opening / closing device. A first bypass circuit, and a second switchgear provided between the first liquid side pipe of the general cooling and heating circuit and the second liquid side pipe of the cooling / radiating circuit. And a second bypass circuit that enables the refrigerant to move between circuits by opening and closing the second switchgear. A cooling operation using the cooling / radiating circuit and the general cooling / heating circuit, or the cooling / radiating circuit or the general cooling / heating circuit, which uses the heat energy stored or stored in the heat storage tank. Alternatively, during the heating operation, both the first switchgear and the second switchgear are shut off to operate the general cooling / heating circuit and the cooling / radiating circuit independently of each other.
During the cold storage operation or the heat storage operation in the heat storage tank, both the first switchgear and the second switchgear are opened,
Regenerative air for forming a cold storage / heat storage circuit including the compressor, the first four-way switching valve, the non-use side heat exchanger, the first or second pressure reducing mechanism, and the cold storage heat exchanger. In the harmony device, a fourth control device is provided which fully opens the fourth pressure reducing mechanism immediately before the end of the heat storage operation and causes the refrigerant in the second usage-side heat exchanger to flow out to the second liquid-side pipe. A heat storage type air conditioner characterized by being formed. 5. A first four-way switching system comprising a compressor, a first four-way switching valve, a non-use side heat exchanger, a first pressure reducing mechanism, and a first use side heat exchanger, which are sequentially connected. A general cooling / heating circuit for freely switching between cooling and heating through the first utilization side heat exchanger by switching the refrigerant flow path of the valve, a refrigerant pump, a second four-way switching valve, a cold storage heat exchanger, Second
A pressure reducing mechanism, a second usage-side heat exchanger, and a second accumulator are sequentially connected, and a third switchgear for connecting the second usage-side heat exchanger and the second accumulator is provided. , A cooling / radiating circuit for freely switching between cooling and heating through the second utilization side heat exchanger by switching the refrigerant flow path of the second four-way switching valve, and the cold storage heat exchanger. A heat storage tank having a built-in heat storage medium that stores and stores heat or releases and radiates heat through the first and second general cooling and heating circuits.
Has a first switchgear provided between the gas side pipe and the second gas side pipe of the cooling / radiating circuit, and allows the refrigerant to move between circuits by opening and closing the first switchgear. A second bypass device; and a second opening / closing device provided between the first liquid side pipe of the general cooling and heating circuit and the second liquid side pipe of the cooling / radiating circuit. A second bypass circuit that allows the refrigerant to move between circuits by opening and closing the switch device, and a cooling / radiating circuit that uses heat energy stored in the heat storage tank or stored in the heat storage tank, and the general cooling and heating circuit. ,
Alternatively, during the cooling operation or the heating operation by one of the cooling / radiating circuit or the general cooling / heating circuit, the first opening / closing device and the second opening / closing device are both shut off for the general cooling / heating The circuit and the cooling / radiating circuit are operated independently, and at the time of the cold storage operation or the heat storage operation in the heat storage tank, the first switchgear and the second switch
And the open / close devices of both of them are opened, and a circuit for cold storage / heat storage including the compressor, the first four-way switching valve, the non-use side heat exchanger, the first or second pressure reducing mechanism, and the heat storage heat exchanger for cold storage In the heat storage type air conditioner configured to form a timer, a timer for measuring a predetermined time set in advance, and a predetermined time measured by the timer for the first four-way switching valve immediately after the heat storage operation or the start of the heat storage operation. And a fifth control means for causing the refrigerant in the second accumulator to flow out to the second gas side pipe while switching only the cold storage operation and opening the third switchgear. Characteristic heat storage type air conditioner.