JPH09152148A - Thermal storage air conditioner - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a heat storage type air conditioner capable of supplementing a shortage of heating capacity by an economical means and performing an appropriate air conditioning operation. SOLUTION: The heat storage tank 13 that stores water that can be frozen, and the water in the heat storage tank 13 is cooled during the cooling operation at night and stored as cold heat of ice and cold water, and the water in the heat storage tank 13 is heated during the heating operation at night. Ice storage heat pump device for storing heat as hot water 11
And a solid heat storage type electric hot water generator 14 that stores heat in the solid heat storage body 32 by using night-time power and generates hot water by using heat dissipation of the heat storage body 32 during the daytime, and cold water or hot water in the heat storage tank 13 during the daytime. The first heat exchanger 42 that is circulated and circulated by the pump operation at the time and the second heat exchanger 43 that is circulated and circulated by the hot water generated by the hot water generator 14 by the pump operation at the daytime are provided. Second
Case 41 in which conditioned air flows through the air conditioning heat exchangers 42, 43
The air-conditioning heat exchange device 15 is provided on the upstream side and the downstream side with respect to the air flow direction inside.

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 for storing cold heat or warm heat by using nighttime electric power and using the cold heat or warm heat for daytime air conditioning.

[0002]

2. Description of the Related Art As an air conditioner installed in a building such as a large building or a small building, a combination of an ice storage heat pump device and an air conditioning heat exchange device is known. This conventional heat storage type air conditioner is capable of switching between cooling operation and heating operation at night and a heat storage tank for storing freezing water. During the cooling operation, the water in the heat storage tank is cooled to store heat as ice and cold water. And an ice storage heat pump device that heats water in the heat storage tank to store heat as hot water during heating operation, a case in which conditioned air flows, and cold water in the heat storage tank that is arranged in the case and is pipe-connected to the heat storage tank. Alternatively, it is provided with an air conditioning heat exchange device having an air conditioning heat exchanger in which hot water is circulated and circulated by operating a pump during the daytime.

The heat pump device includes a first heat exchanger which is exposed to the outside air, a second heat exchanger which is arranged in the heat storage tank and exchanges heat with water in the heat storage tank, and a first heat exchanger which compresses a refrigerant. A compressor that circulates between the heat exchanger and the second heat exchanger, a switching valve that switches the direction of the flow of the refrigerant, and a pipe between the first heat exchanger and the second heat exchanger. It has an expansion valve incorporated in the road, and is configured to be able to switch between cooling operation and heating operation by a switching operation of the switching valve.

Further, the heat exchange device for air conditioning has a case in which conditioned air flows, and a pipe connected to the heat storage tank arranged in the case so that cold water or hot water in the heat storage tank is circulated and circulated by pumping during the daytime. And a heat exchanger for air conditioning.

The heat storage type air conditioner thus constructed is
The following operations are performed during cooling operation. In the ice storage type heat pump device, the first heat exchanger functions as a condenser and the second heat exchanger functions as an evaporator during cooling operation at night. When the second heat exchanger functions as an evaporator, the water in the heat storage tank is cooled to a low temperature, an ice layer is formed on the outer surface of the tube of the second heat exchanger, and the remaining tank The internal water is made into low-temperature cold water, and this ice and cold water are stored as heat in the heat storage tank.

The cold heat of ice and cold water stored in the heat storage tank is used as a main heat source for cooling during the daytime. In this case, the ice-cooled cold water in the heat storage tank is circulated through the pipe to the air conditioning heat exchanger by the pump operation. The heat exchange device for air conditioning cools the conditioned air with cold water flowing through the heat exchanger for air conditioning. Then, the cooled air is sent to each part of the building by the blower duct to perform cooling during the daytime.

The following operation is performed during the heating operation. The ice storage type heat pump device is the first when the heating operation is performed.
Of the heat exchanger functions as an evaporator, and the second heat exchanger functions as a condenser. Then, the second heat exchanger functions as a condenser to heat the water in the heat storage tank and store the heat in the heat storage tank as high-temperature hot water.

The hot water stored in the heat storage tank is used as a main heat source for heating during the daytime. In this case, the hot water in the heat storage tank is circulated through the pipe to the heat exchanger of the heat exchange device for air conditioning. The air conditioning heat exchange device heats the conditioned air by the hot water flowing through the air conditioning heat exchanger. Then, the heated air is sent to each part of the building by the air duct to perform heating during the daytime.

Generally, in an air conditioner using an ice heat storage type heat pump device, ice is stored in the heat storage tank by the ice heat storage type heat pump device in summer to perform cooling operation, and in winter, the ice heat storage type heat pump device is used in the heat storage tank. The hot water is made into and heating operation is performed. In the spring and autumn, the ice storage heat pump device is switched to the cooling operation or the heating operation by operating the switching valve according to the height of the outside air temperature to perform the cooling or the heating.

[0010]

The conventional air conditioner using the above-mentioned ice heat storage type heat pump device has the following problems. The first problem is that the heating capacity is insufficient. The ice heat storage type heat pump device can economically use energy in order to store heat by using inexpensive nighttime power, but there is a significant difference in the heat storage capacity of ice and the heat storage capacity of hot water.

That is, since ice has energy for melting it, the amount of heat accumulated by ice is larger than the amount of heat accumulated by ice having the same volume as that of warm water.
Since the ice heat storage type heat pump device is a system that stores the cold heat of ice, the difference in the amount of heat as described above appears as it is as the difference between the cooling capacity and the heating capacity of the air conditioner and is adjusted according to the cooling capacity. If the volume of the heat storage tank is set by this, the heating capacity will be insufficient.

When the heating capacity is insufficient in this way,
It is necessary to use an expensive daytime electric power to operate the ice storage heat pump device, or to use a boiler that uses oil or gas as a fuel to supplement the heat for the insufficient heating capacity. However, these measures are uneconomical, and in particular, the latter measures have a problem in that exhaust gas is generated.

If the volume of the heat storage tank is increased in order to increase the heating capacity, this heat storage tank becomes larger than necessary for the cooling capacity, and the equipment of the ice heat storage type heat pump device becomes very large.

The second problem is that the conventional air conditioner only selects one of the cooling operation and the heating operation.
Air conditioning operation cannot be performed with other combinations of temperature and humidity. In other words, it is not possible to perform air conditioning operation with a combination of temperature and humidity that humans feel comfortable.

In particular, during the rainy season when the humidity is high or during the spring and autumn when the temperature fluctuates drastically, air-conditioning by a combination of temperature and humidity suitable for the time is required only by the cooling operation or the heating operation.
That is, it is not possible to operate the air conditioning by the combination of temperature and humidity that humans feel comfortable at that time.

A first object of the present invention is to provide a heat storage type air conditioner capable of compensating for the shortage of heating capacity by an economical means and performing an appropriate air conditioning operation according to a required combination of temperature and humidity. To do. A second object of the present invention is to provide a heat storage type air conditioner capable of compensating for insufficient heating capacity by an economical means.

[0017]

In order to solve the first problem, a heat storage type air conditioner according to the invention of claim 1 has a heat storage tank 13 for storing freezing water 22, and a cooling operation at night. And the heating operation can be switched. During the cooling operation, the water in the heat storage tank 13 is cooled and stored as cold heat of ice and cold water, and in the heating operation, the water in the heat storage tank 13 is heated and stored as hot water. And a solid heat storage type electric hot water generator 14 for storing heat in the solid heat storage body 32 by using night-time power and generating hot water by using heat radiation of the heat storage body 32 during the daytime, and connecting pipes to the heat storage tank 13. The cold water or hot water in the heat storage tank is pipe-connected to the first air conditioning heat exchanger 42 and the hot water generator 14, which are circulated and circulated by the pump operation in the daytime, and the hot water generated by the hot water generator is in the daytime. Pong The second air conditioning heat exchanger 43, which is circulated and circulated by operation, is provided, and the first air conditioning heat exchanger 42 is arranged on the upstream side with respect to the air flow direction in the case 41 in which conditioned air flows. The air-conditioning heat exchanger 43 is provided with the air-conditioning heat exchanger 15 arranged on the downstream side of the air flow direction in the case 41.

According to the first aspect of the present invention, when the air conditioning operation is performed by the combination of the required temperature and the relative humidity, the ice-cooled cold water in the heat storage tank 13 is supplied to the first heat exchange device 15 for air conditioning. The water is supplied to the heat exchanger 42, and at the same time, the hot water obtained by the solid heat storage type electric hot water generator 14 is supplied to the second heat exchanger 43 of the air conditioning heat exchanger 15.

Then, the conditioned air flowing through the air-conditioning heat exchange device 15 first comes into contact with the first heat exchanger 42, and is cooled to a predetermined temperature by the cold heat of the heat exchanger 42. This reduces the absolute humidity of the air. Then, the conditioned air contacts the second heat exchanger 43,
The heat of the heat exchanger 43 raises the temperature to a predetermined temperature. This reduces the relative humidity of the air. In this way, the temperature and humidity of the air are adjusted, and air conditioning can be performed by combining the temperature and humidity of the air according to the season.

Further, the heat storage type air conditioner of the present invention uses the hot water in the heat storage tank 13 for the air conditioning heat exchange device 1 during the heating operation.
The hot water supplied to the first heat exchanger 42 of No. 5 and obtained by the solid heat storage type electric hot water generator 14 is supplied to the second heat exchanger 43 of the air conditioning heat exchanger 15 to heat the conditioned air. As a result, the solid heat storage type electric hot water generator 14 can reinforce the heating capacity of the heat pump device 11 and enhance the heating capacity of the entire air conditioner. For example, when the temperature of the outside air is low, the rise of the heating operation can be improved by operating the solid heat storage type hot water generator 14.

Further, the heat storage tank 13 has a volume set on the basis of the cooling capacity, the heating operation is carried out on the basis of the heat storage tank 13 having this volume, and the shortage of the heating capacity is solid heat storage type electric hot water generator. Reinforce with 14. Therefore, the heat storage tank 1
3 does not need to be a large volume based on heating capacity, and it is not necessary to supplement the heating capacity with a boiler that uses oil or gas as fuel, and avoid the problem of air pollution due to flue gas. You can

The solid-state heat storage type electric hot water generator 14
Since the solid heat storage body 32 used for is small and can store much heat, the solid heat storage type hot water generator 14 is small and does not emit smoke like a boiler.

In order to solve the second problem, in the heat storage type air conditioner according to the invention of claim 2, the heat storage tank 13 for storing the water 22 that can be frozen and the switching between the cooling operation and the heating operation at night are provided. An ice storage heat pump device 11 capable of cooling water 22 in the heat storage tank 13 to store heat as cold heat of ice and cold water during heating operation and heating the water 22 in the heat storage tank 13 to store heat as hot water during heating operation, and conditioned air Case 102 in which heat flows and the heat storage tank 1 arranged in the case
A heat exchanger 101 for air conditioning, which has a heat exchanger 103 for air conditioning, which is connected to a pipe 3 to circulate cold water or hot water of the heat storage tank by circulating a pump during the daytime, and a solid heat storage body 32 using night power. And a solid heat storage type hot water heating device 100 which heats hot water supplied to the air conditioning heat exchanger 103 by using heat radiation of the heat storage body 32 during daytime. .

According to the invention of claim 2, the heat storage tank 13
When this hot water is supplied to the air conditioning heat exchanger 103, this hot water can be reheated by the solid heat storage type hot water heating device 100 to raise the temperature. Therefore, even if the heat exchanger 103 for the air conditioning heat exchanger 101 has only one heat exchanger, the solid-state heat storage type hot water heating device 100 can reinforce the heating capacity of the heat pump device 11 to enhance the heating capacity.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment (first embodiment) of the present invention will be specifically described below with reference to FIGS. In this embodiment, the air conditioner of the present invention is installed in a building. In the figure, 1 is a building in which the air conditioner of the present invention is installed, 2 is each floor above the building 1, 3 is the roof of the building 1. Part 4 shows the underground floor of the building 1.

Reference numeral 11 denotes an ice heat storage type heat pump device, and 13
Is a heat storage tank containing freezeable water 22 (the size of this heat storage tank is set to a volume corresponding to the cooling capacity). The heat storage tank 13 and the heat pump device 11 are unit type, and the building 1 They are installed side by side on the rooftop 3 as shown.

Reference numeral 14 denotes a solid heat storage type electric hot water generator, 1
Reference numeral 5 denotes a heat exchange device for air conditioning, and the solid heat storage type electric hot water generator 14 and the heat exchange device 15 for air conditioning are installed in the underground floor 4 of the building 1, respectively.

The ice heat storage type heat pump device 11 is operated by using inexpensive night-time electric power, and is arranged in the heat storage tank 13 and the first heat exchanger 18 exposed to the outside air. The second heat exchanger 19 that exchanges heat with the water 22 of 13
A compressor 20 for compressing the refrigerant to circulate between the first heat exchanger 18 and the second heat exchanger 19, a switching valve 21 for switching the direction of the refrigerant flow, and a first heat Exchanger 18
It has an expansion valve (not shown) incorporated in a pipe line between the second heat exchanger 19 and the second heat exchanger 19, and the switching operation of the switching valve 21 enables switching between cooling operation and heating operation at night. Is configured.

The first heat exchanger 18 and the compressor 2
0, the switching valve 21, and an expansion valve (not shown) are incorporated into the apparatus box 16 to form the heat pump 12.
The device box 16 includes an outside air inlet 16a and an outside air outlet 16a.
b, the blower fan 17 provided at the outside air outlet 16b drives the outside air from the outside air inlet 16a to flow the inside of the device box 16 and exhaust the outside from the outside air outlet 16b. The air flowing inside 16 contacts the first heat exchanger 18 so that heat can be exchanged.

The first heat exchanger 18, the second heat exchanger 19, the compressor 20 and the switching valve 21 are connected in series by a pipe to form a refrigerant circulation pipe line. Is filled with a refrigerant.

The solid heat storage type electric hot water generator 14 is a device for storing heat in the solid heat storage body 32 by using nighttime electric power to generate hot water by utilizing heat radiation of the heat storage body 32 in the daytime. Case 31, solid heat storage body 32 provided inside this heat insulation case 31, electric heater 33 that heats this solid heat storage body 32, and air passage 34 that circulates and circulates air provided inside heat insulation case 31. And a blower fan 35 and a heat exchanger 36 for generating hot water provided in the air passage 34.

Next, the air conditioning heat exchange device 15 will be described. The air conditioning heat exchange device 15 includes a case 41 in which conditioned air is internally circulated, and first and second heat exchangers 42 and 43 provided inside the case 41.

The first air conditioning heat exchanger 42 is the heat storage tank 13
The cold water or the hot water of the above is made to flow into the pipe to exchange heat with the conditioned air flowing through the inside of the case 41, which is arranged on the upstream side with respect to the air flow direction in the case 41 and cools the heat storage tank 13. Pipes are connected through a water feed pipe 51 and a hot / cold water return pipe 52 as shown in the figure.

The second air-conditioning heat exchanger 43 causes the warm water generated by the warm water generator 14 to flow into the pipe, and the case 4
1 is for heat exchange with the conditioned air flowing through the inside of the case 1, and is arranged on the downstream side with respect to the air flow direction in the case 41, and is connected to the heat exchanger 36 of the hot water generator 14 by the hot water feed pipe 61 and hot water. The return pipe 62 is connected to the pipe as shown in the drawing.

Reference numeral 44 denotes an air feed duct, which extends from the underground floor 4 of the building 1 to each floor 2 above the ground, one end of which is connected to the downstream end of the case 41 in the air flow direction, An air outlet is formed in a portion corresponding to each floor 2 on the ground.

Reference numeral 45 denotes an air return duct which extends from the underground floor 4 of the building 1 to each floor 2 above the ground, one end of which is connected to the upstream end of the case 41 in the air flow direction, An air inlet is formed at a portion corresponding to each floor 2 on the ground.

That is, the air feed duct 44 sends out the air that has been heat-exchanged in the case 41 from the air outlet to each floor 2 of the building 1, and the air return duct 45 is the air return duct 45.
Case 41 by taking in the air of each floor 2 from the air inlet
It is to return to. An outside air intake duct 46 that takes in outside air into the case 41 is provided in the building 1 as shown in the drawing.

The cold / hot water feed pipe 51 is connected to the lower side of the heat storage tank 13 and the inlet of the air-conditioning heat exchanger 42 (first heat exchanger), and the cold / hot water return pipe 52 is connected to the heat storage tank 13. The feed pump 53 is connected to the upper part and the outlet of the air conditioning heat exchanger 42 (first heat exchanger), and the feed pipe 51 causes cold water or hot water of the heat storage tank 13 to flow in the direction of the arrow in the figure. Has been installed. That is, the cold / hot water feed pipe 51 and the cold / hot water return pipe 52 circulate the cold water or hot water in the heat storage tank 13 to the first heat exchanger 42.

A detour pipe line 54 is connected to an intermediate portion of the cold / hot water feed pipe 51 and an intermediate portion of the cold / hot water return pipe 52. The bypass pipe 54 is connected to and cut off from the cold / hot water feed pipe 51 by an electric switching valve 55 provided in the cold / hot water feed pipe 51.

The hot water feed pipe 61 is connected to the inlet of the heat exchanger 36 of the solid heat storage type electric hot water generator 14 and the outlet of the air conditioning heat exchanger 43 (second heat exchanger), The return pipe 62 is connected to the outlet of the heat exchanger 36 and the inlet of the air-conditioning heat exchanger 43 (second heat exchanger), and the hot water feed pipe 61 is provided with a feed pump 63. is set up.

The hot water feed pipe 61, the hot water generating heat exchanger 36, the hot water return pipe 62, and the air conditioning heat exchanger 43.
Water is filled in a circulation pipeline constituted by (second heat exchanger), and hot water is generated by heating the water by the heat exchanger 36 for hot water generation. By operation, it is circulated and circulated to the second heat exchanger 43 of the air conditioning heat exchange device 15.

A detour pipe line 64 is connected to an intermediate portion of the hot water feed pipe 61 and an intermediate portion of the hot water return pipe 62. The bypass pipe 64 is connected to and disconnected from the hot water feed pipe 61 by an electric switching valve 65 provided in the hot water feed pipe 61.

Next, the control system will be described. 71 in the figure
Is a controller for switching the switching valve 55. This is an electrically operated switching valve 55 and a case 4 of the air conditioning heat exchange device 15.
Thermometer 72 for measuring the temperature of the air after passing through the first heat exchanger 42 in No. 1 and the building 1 in the return duct 45.
Is connected to a thermometer 73 for measuring the temperature of the air after air conditioning, as shown in the drawing, and the switching valve 55 is automatically switched according to the air temperature measured by the thermometers 72 and 73. You can do it.

Reference numeral 74 is a controller for hot water, which is wired and connected to an electric switching valve 65 and a thermometer 75 for measuring the temperature of the air in the return duct 45 after air conditioning the building 1. The switching valve 65 can be automatically switched according to the air temperature measured by the thermometer 75.

The operation of the heat storage type air conditioner configured as described above will be described. First, the case of performing the cooling operation will be described with reference to FIG. In the ice heat storage type heat pump device 11, the first heat exchanger 18 functions as a condenser and the second heat exchanger 19 functions as an evaporator when the cooling operation is performed using the nighttime electric power. The switching valve 21 is operated so that the refrigerant flows in the direction of the arrow in FIG. The blower fan 17 and the compressor 20 of the heat pump 12 are operated by using nighttime electric power.

As a result, the refrigerant flows in the direction of the arrow in FIG.
The second heat exchanger 19 functions as an evaporator in the refrigeration cycle. By this function, the water in the heat storage tank 13 is cooled to a low temperature, an ice layer is formed on the outer surface of the pipe of the heat exchanger 19, and the cold heat by the ice and cold water is stored in the heat storage tank 13.

In the daytime, the cold heat stored in the heat storage tank 13 (ice-cooled cold water) is used as the main heat. Pump 53
When rotationally driven, the cold water in the heat storage tank 13 is sent to the first heat exchanger 42 of the air conditioning heat exchange device 15 through the feed pipe 51 as shown by the solid line arrow direction in FIG.
After passing through, the gas is circulated through the return pipe 52 so as to return to the heat storage tank 13 again.

In the case 41 of the heat exchange device 15 for air conditioning,
The air used for air conditioning of the building 1 flows in through the return duct 45, and the outside air flows in through the outside air intake duct 46. The inflowing air contacts the first heat exchanger 42 and is cooled by the cold water flowing through the heat exchanger 42. The cooled air is sent to each floor 2 of the building 1 by the feed duct 44 to cool each floor 2.

Next, the heating operation will be described with reference to FIG. In the ice heat storage type heat pump device 11, the first heat exchanger 18 functions as an evaporator and the second heat exchanger 19 functions as a condenser when heating operation is performed by using nighttime electric power. The switching valve 21 is operated so that the refrigerant flows in the direction of the arrow in FIG. Blower fan 17 and compressor 20 of heat pump 12
Drive using night power.

As a result, the refrigerant flows in the direction of the arrow in FIG.
The second heat exchanger 19 functions as a condenser in the refrigeration cycle. With this function, the water in the heat storage tank 13 is heated to a high temperature, and the heat generated by the hot water is stored in the heat storage tank 13.

During the daytime, the warm heat (hot water) stored in the heat storage tank 13 is used as a main heat source. When the pump 53 is rotationally driven, the hot water in the heat storage tank 13 flows through the feed pipe 51 and the return pipe 52 in the direction indicated by the broken line arrow in FIG. 2, and circulates with respect to the first heat exchanger 42 of the air conditioning heat exchange device 15. Circulate.
The air flowing in the case 41 through the ducts 45, 46 of the air conditioning heat exchange device 15 comes into contact with the first heat exchanger 42 and is heated by the hot water flowing in the pipe of the heat exchanger 42. Then, it is sent to each floor 2 of the building 1 through the feed duct 44 to heat each floor 2.

In the cooling operation and the heating operation as described above, when the switching valve 55 is controlled to communicate with both the pipes 51 and 52, cold water or hot water flows into the first heat exchanger 42. It circulates through the bypass pipe 54 so that it does not exist.

Here, the volume of the heat storage tank 13 is determined on the basis of the cooling capacity in order to avoid enlargement of the equipment. Therefore, the heating capacity is smaller than the cooling capacity,
During the heating operation, the heating capacity may be insufficient only by the hot water heat storage of the heat storage tank 13 depending on the conditions of the outside air. In this case, the heating capacity is supplemented by the heat storage type electric hot water generator 14.

The operation of the heat storage type hot water generator 14 in this case will be described. The solid heat storage body 32 is heated by energizing the electric heater 33 by using the nighttime electric power to heat the solid heat storage body 32. Blower fan 3 during daytime
When 5 is driven to rotate, air circulates in the air passage 34 and is heated by the heat released from the solid heat storage body 32.
The heated air is transferred to the heat exchanger 3 provided in the air passage 34.
The heat exchanger 36 is heated by contacting the heat exchanger 6.

On the other hand, when the pump 63 is rotationally driven during the daytime, the water as the heat exchange medium for hot water is heated by the hot water feed pipe 61, the heat exchanger 36, the hot water return pipe 62 and the heat exchange device 15 for air conditioning.
2 circulates in the pipe line connecting the second heat exchanger 43 in the direction of the broken line arrow in FIG. Then, when this circulating water passes through the heat exchanger 36, it is heated by warm air to increase its temperature, and when passing through the second heat exchanger 43 of the air conditioning heat exchange device 15, the conditioned air flowing through the case 41 is removed. To heat.

As a result, the heat storage type electric hot water generator 14 can reinforce the heating capacity of the heat storage tank 13 by storing heat to enhance the heating capacity. For example, when the temperature of the outside air is low, the rise of the heating operation can be improved by operating the solid regenerative electric hot water generator 14 by a pump.

Further, the heat storage tank 13 has a volume set on the basis of the size of the cooling capacity, the heating operation is performed on the basis of this heat storage tank 13, and the shortage of the heating capacity is determined by the solid heat storage type electric hot water generator. Reinforce with 14. Therefore, it is not necessary to make the heat storage tank 13 have a large capacity based on the heating capacity, and it is not necessary to supplement the heating capacity by using a boiler that uses liquid fuel or the like as a fuel, so that air pollution due to smoke exhaust is prevented. It can be avoided.

Since the solid regenerator 32 used in the solid heat storage type electric hot water generator 14 can store a large amount of heat in a small volume, the solid heat type electric hot water generator 14 is used.
Is small and does not emit smoke like a boiler.

Next, the case of performing the air conditioning operation by the combination of the required temperature and the relative humidity will be described with reference to FIG. The principle of this air conditioning operation will be described. Air-conditioning conditions are set such that the temperature of the air to be obtained is A ° C. and the relative humidity is B% (absolute humidity C). The temperature D ° C. and relative humidity E% of the air (outside air) that is the target of air conditioning operation are measured. A temperature G at which the absolute humidity of the target air becomes the same as the absolute humidity C of the air having an air temperature of A ° C. and a relative humidity of B% is obtained based on a known moist air i · x diagram. Then, the target air is cooled and the temperature is lowered from the temperature D ° C. to the temperature G. When the temperature of the target air reaches the temperature F ° C. in the process of decreasing, the relative humidity of the target air changes from E% to 100%.

Further, when the target air is cooled to lower the temperature, the relative humidity of the air remains 100%, but the absolute humidity decreases. When the temperature of the target air drops to the cooling temperature G, the absolute humidity of the air drops to the absolute humidity C. Therefore, when the target air is heated to raise the temperature from the temperature G to the set A ° C., the air having the air temperature A ° C. and the relative humidity B% (absolute humidity C) can be obtained.

An example will be described. When air having a temperature of 22 ° C. and a relative humidity of 50% is obtained in an air conditioner, it is assumed that the outside air has a temperature of 18 ° C. and a relative humidity of 80%. Based on the moist air i · x diagram, this outside air is
When cooled to 0 ° C., the relative humidity becomes 100% and the water in the air remains as condensed water. Further, when the air is cooled to 11 ° C., it becomes air having a temperature of 11 ° C. and a relative humidity of 100%. Absolute humidity in the air at this time is 0.01025 kg
/ Kg to 0.00825 kg / kg. When the temperature of this air is raised to 22 ° C, the temperature becomes 2
Air having a temperature of 2 ° C. and a relative humidity of 50% can be obtained.

A specific operation will be described. Cold water in which ice is stored in the heat storage tank 13 in the cooling operation of the ice heat storage type heat pump device 11 is caused to flow in the direction indicated by the solid arrow in FIG. 3 and supplied to the first heat exchanger 42 of the air conditioning heat exchange device 15. At the same time, the hot water obtained by the solid heat storage type electric hot water generator 14 is caused to flow in the direction indicated by the broken line arrow in FIG.
5 to the second heat exchanger 43.

In this state, the air used for air conditioning of the building 1 is returned to the case 41 of the air conditioning heat exchange device 15 by the return duct 4
When the outside air enters through the outside air intake duct 46 and the outside air flows in through the outside air intake duct 46, the incoming air first comes into contact with the first heat exchanger 42. Here, the air is cooled by the cold water flowing through the first heat exchanger 42 and its temperature drops. The relative humidity of the air changes from E% to 100% in the process of the temperature drop of the air.

Further, when the target air is cooled to lower the temperature, the relative humidity of the air remains 100%, but the absolute humidity decreases. And the air conditioning conditions you are trying to obtain,
Cool to absolute humidity temperature corresponding to relative humidity.

Next, the conditioned air passes through the first heat exchanger 42 and comes into contact with the second heat exchanger 43. Here, the air is heated by the hot water flowing through the second heat exchanger 43 and rises in temperature to the air conditioning condition temperature. This allows the air to be adjusted to the temperature and humidity of the set air conditioning conditions.

In this way, the temperature and humidity of the air are adjusted, and appropriate air conditioning can be performed by combining the temperature and humidity of the air according to the season. That is, it is possible to perform comfortable air conditioning for humans according to the season. Especially when the humidity of the outside air is high, when the outside air is cooled to reduce the humidity, people may feel chilly. Therefore, it is suitable when the outside air is heated to raise the temperature to make comfortable air conditioning conditions.

In the embodiment described above, the second heat exchanger 19 of the ice heat storage type heat pump device 11 is provided inside the heat storage tank 13 so that the water 22 in the heat storage tank 13 is directly cooled or heated. However, the relationship between the second heat exchanger 19 and the heat storage tank 13 is not limited to this, and the water 22 in the heat storage tank 13 is indirectly cooled or heated by the second heat exchanger 19. It may be done.

FIG. 4 shows this second embodiment.
This second embodiment is the second embodiment of the configuration shown in FIGS.
The relationship between the heat exchanger 19 and the heat storage tank 13 is changed, and the same parts in FIG. 4 as those in FIGS. 1 to 3 are denoted by the same reference numerals.

In FIG. 4, 81 is a heat exchange tank, and the second heat exchanger 19 is provided inside the heat exchange tank 81. The heat storage tank 13 is provided with a heat storage heat exchanger 90. Connection pipes 82 and 83 are connected to the heat exchange tank 81, and one connection pipe 82 is connected to one end of a heat storage heat exchanger 90 via a switching valve 88 and a heat storage tank. 13 is connected to a hot water pipe 86, and the other connecting pipe 83 is connected to a heat storage heat exchanger 90 via a switching valve 89.
A cold water pipe 85 connected to the other end of the hot water pipe 87 and a hot water pipe 87 connected to the heat storage tank 13 are connected to each other.

A pump 91 is provided in the one connecting pipe 82. Heat exchange tank 81 and heat exchanger 90 for heat storage
And the heat exchange medium 9 is connected to the pipes 82 to 85 connecting them.
2. For example, an antifreeze liquid is put in, and freezing water 22 is put in the heat storage tank 13 and hot water pipes 86, 87 communicating with the heat storage tank.

Then, in the heat pump 12 including the first heat exchanger 18, the second heat exchanger 19, the compressor 20, the switching valve 21, etc., the heat exchange tank 81 and the heat storage heat exchanger 90 as described above are provided. Also, the ice storage heat pump device 11 is configured by adding these connecting pipes.

During the cooling operation, the connection pipes 82 and 83 and the cold water pipes 84 and 85 are connected by the switching valves 88 and 89 so that the heat exchange medium 92 flows as shown by the solid line arrow in FIG. The heat storage heat exchanger 90 is connected. When the ice heat storage type heat pump device 11 is subjected to the cooling operation at night in this state, the second heat exchanger 19 functions as an evaporator in the refrigeration cycle and the heat storage medium 92 (antifreeze liquid) for heat storage in the heat exchange tank 81. To a low temperature.

The cooled heat exchange medium 92 for heat storage is operated by the pump 91 from the heat exchange tank 81 to the connecting pipe 82, the cold water pipe 85, the heat storing heat exchanger 90, the cold water pipe 86 and the connecting pipe 8.
It circulates and circulates in a path that returns to the heat exchange tank 81 via No. 3. When the heat storage heat exchange medium 92 passes through the heat storage heat exchanger 90, the water 22 in the heat storage tank 13 is cooled to a low temperature, and the heat storage heat exchanger 90 is cooled.
An ice layer is formed on the outer surface of the tube, and the cold heat due to the ice and cold water is stored in the heat storage tank 13. The other operations of the cooling operation are the same as those in the first embodiment described above, and thus detailed description thereof will be omitted.

During the heating operation, the heat exchange medium for heat storage 92
Drain (antifreeze) from the pipe and replace with water 22. Then, switching valves 88, 89 are provided so that the water 22 flows through the connecting pipes 82, 83 and the hot water pipes 86, 87 as shown by the broken line arrows in the figure.
And the heat exchange tank 81 and the heat storage tank 13 are connected to each other.
When the ice heat storage type heat pump device 11 is heated at night in this state, the second heat exchanger 19 functions as a condenser in the refrigeration cycle, and the water 2 in the heat exchange tank 81
Heat 2 to high temperature.

The heated hot water is supplied from the heat exchange tank 81 to the connecting pipe 82, the hot water pipe 86, the heat storage tank 1 by the operation of the pump 91.
3, it circulates and circulates through the route returning to the heat exchange tank 81 via the hot water pipe 87 and the connecting pipe 83, and stores heat in the heat storage tank 13 as hot water heat. The other operations of the heating operation are the same as those in the first embodiment described above, and thus detailed description thereof will be omitted.

The structure of the ice heat storage type heat pump device 11 is as follows.
The present invention is not limited to the above-described first and second embodiments, and various configurations that realize the basic principle thereof can be adopted. For example, the ice heat storage type heat pump device 11 can be a separate type in which the heat storage tank 13 is separated,
Further, the heat storage tank 13 can be installed in an appropriate place of the building, for example, in the underground floor 4.

Further, the construction of the pipe line connecting the ice heat storage type heat pump device 11, the solid heat storage type electric hot water generating device 14 and the air conditioning heat exchange device 15 is limited to the above-mentioned first and second embodiments. Instead, various configurations that realize the gist of the present invention can be adopted.

Next, an embodiment according to the invention of claim 2 will be described with reference to FIGS. 5 and 6, the ice heat storage type heat pump apparatus 11 adopts the configuration of the heat pump apparatus 11 shown in FIG. 4, and the solid state heat storage type hot water heating apparatus 100 has the configuration shown in FIGS. 1 to 4. The structure of the heat storage type electric hot water generator 14 is adopted. Therefore, in FIGS. 5 and 6, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals.

The characteristic configuration of this embodiment will be described. In the figure, 101 is an air conditioning heat exchange device. The air conditioning heat exchange device 101 includes a case 102 and a case 102.
A heat exchanger 103 for air conditioning provided inside the air conditioner, a feed duct 104 and a return duct 1 connected to the case 102.
05 and the outside air intake duct 1 connected to the case 102
And 06.

Reference numeral 114 denotes a cold water feed pipe connecting the lower side of the heat storage tank 13 and the inflow pipe 111 of the air conditioning heat exchanger 103,
The cold water feed pipe 114 has an opening / closing valve 116 and a check valve 129.
Is incorporated. Reference numeral 115 is a cold water return pipe that connects the upper part of the heat storage tank 13 and the outflow pipe 112 of the air conditioning heat exchanger 103. An on-off valve 117 is incorporated in the cold water return pipe 115, and a pump 113 is installed in the outflow pipe 112. Are provided intervening.

Reference numeral 118 is a hot water feed pipe connecting the lower side of the heat storage tank 13 and the inflow pipe 111 of the air conditioning heat exchanger 103,
Two opening / closing valves 120 and 121 are incorporated in the hot water feed pipe 118 at intervals in the pipe direction. Reference numeral 119 is a hot water return pipe that connects the heat storage tank 13 and the outflow pipe 112 of the air conditioning heat exchanger 103. The hot water return pipe 119 is provided with two opening / closing valves 122 and 123 at intervals in the pipeline direction. It is incorporated.

Reference numeral 124 denotes an inlet pipe for the hot water heating device, which is one end of the heat exchanger 36 of the solid heat storage type hot water heating device 100 and the open / close valve 122 and the open / close valve 1 in the hot water return pipe 119.
It is connected to the part between 23 and. A pump 126 is provided in the inlet pipe 124.
Reference numeral 125 denotes a delivery pipe for the hot water heating device, which is connected to the other end of the heat exchanger 36 of the solid heat storage type hot water heating device 100 and a portion of the hot water delivery pipe 118 between the on-off valve 120 and the on-off valve 121. Has been done.

A bypass pipe 127 connects the hot water feed pipe 118 and the hot water heating device feed pipe 124, and a valve 128 is incorporated in the bypass pipe 127. Reference numeral 130 is a switching valve that connects and disconnects a bypass pipe line between the inflow pipe 111 and the outflow pipe 112 of the air conditioning heat exchanger 103.

The operation of the air conditioner thus configured will be described. The cooling operation will be described with reference to FIG. Open / close valves 121, 12 of the hot water system during cooling operation
2 is closed and the open / close valves 116 and 117 of the cold water system are opened. The operation of the ice heat storage type heat pump device 11 in the cooling operation has been described in the above-described second embodiment, and will be omitted. When the pump 113 is driven, the ice-cooled cold water in the heat storage tank 13 is cooled by the cold water feed pipe 114 as shown by the solid line arrow in FIG.
Inflow pipe 111, heat exchanger 103 for air conditioning, outflow pipe 112,
It circulates so as to return to the heat storage tank 13 through the cold water return pipe 115.

The air used for air conditioning in the building 1 returns to the case 102 through the return duct 105, and the outside air is taken into the case 102 from the outside air intake duct 106. The air passing through the case 102 is cooled by the cold water flowing through the air-conditioning heat exchanger 103, and is sent to the building 1 by the sending duct 104.
Is sent inside the.

The heating operation will be described with reference to FIG. On-off valves 116, 11 of the cold water system during heating operation
7 is opened, and the open / close valves 121 and 112 of the hot water system are opened. Since the operation of the ice heat storage type heat pump device 11 in the heating operation has been described in the second embodiment described above, the description thereof will be omitted. When the pump 113 is driven, the hot water in the heat storage tank 13 is heated by the hot water feed pipe 118 and the inflow pipe 1 as shown by the broken line arrow in FIG.
11, the air conditioning heat exchanger 103, the outflow pipe 112, and the hot water return pipe 119 are circulated to return to the heat storage tank 13.

Here, when the pump 126 is driven during the heating operation, a part of the hot water flowing through the hot water return pipe 119 flows from the hot water heating device inlet pipe 124 to the solid heat storage type hot water heating device 1.
00 of the heat exchanger 36, and the delivery pipe 12 for the hot water heating device
5 to return to the hot water feed pipe 118. In the solid heat storage type hot water heating apparatus 100, the air circulating in the air passage 34 is heated by utilizing the heat storage of the solid heat storage body 32 as described in the above-mentioned embodiment, and thus the heat generated by the heated air is used. The hot water flowing through the heat exchanger 36 is reheated by the exchange action, and the temperature of the hot water flowing through the hot water system can be raised.

Case 1 in the heat exchange device 101 for air conditioning
In 02, the air used for air conditioning in the building 1 returns to the case 102 through the return duct 105, and the outside air is taken into the case 102 from the outside air intake duct 106. The air passing through the case 102 is heated by the hot water flowing through the heat exchanger 103, and is sent to each floor 2 of the building 1 by the sending duct 104. Here, as described above, the solid-state heat storage type hot water heating device 100 heats the hot water to raise the temperature, so that the air conditioning heat exchanger 103 can strongly heat the air.

When performing the heating operation as described above, the hot water in the heat storage tank 13 is supplied to the air conditioning heat exchanger 103, and a part of the hot water flowing out from the air conditioning heat exchanger 103 is heated by the solid heat storage type hot water. Supply to the device 100 to raise the temperature,
Since the heat exchanger 103 for air conditioning is heated by merging it with the hot water directly supplied from the heat storage tank 13, the solid heat storage type hot water heating apparatus 100 reinforces the heating capacity of the ice storage type heat pump apparatus 11 and has a sufficient heating capacity. Can be obtained.

Therefore, the heat storage tank 13 is set in volume based on the cooling capacity, the heating operation is performed based on this heat storage tank 13, and the shortage of the heating capacity is reinforced by the solid heat storage type hot water heating device 100. To do. Therefore, it is not necessary to make the heat storage tank 13 have a large volume based on the heating capacity, and it is not necessary to supplement the heating capacity by using a boiler that uses liquid fuel or the like as fuel. The pollution of can be avoided.

Since the solid regenerator 32 used in the solid regenerator type hot water heating apparatus 100 can store a large amount of heat in a small volume, the solid regenerator type hot water heating apparatus 100 is small, like a boiler. It does not emit smoke. Therefore, the ice heat storage type heat pump device 1 is provided by an economical means.
It is possible to reinforce the lack of heating capacity of No. 1 and increase the heating capacity.

[0092]

According to the heat storage type air conditioner of the first aspect of the present invention, when the air conditioning operation is performed by the combination of the required temperature and the relative humidity, the cold water in the heat storage tank 13 is stored in the heat exchange device 15 for air conditioning. It is supplied to the first heat exchanger 42, and at the same time, the hot water obtained by the solid heat storage type electric hot water generator 14 is supplied to the second heat exchanger 43 of the air conditioning heat exchanger 15.

Then, the conditioned air flowing through the air conditioning heat exchange device 15 first comes into contact with the first heat exchanger 42, and the temperature of the conditioned air is lowered to a predetermined temperature by the cold heat of the heat exchanger. Next, the conditioned air comes into contact with the second heat exchanger 43, and the temperature of the conditioned air is raised to a predetermined temperature by the heat of the heat exchanger. This reduces the relative humidity of the air.

In this way, the temperature and humidity of the air are adjusted, and appropriate air conditioning that is comfortable for the human body can be performed by combining the temperature and humidity of the air according to the season. Further, the heat storage type air conditioner of the present invention supplies hot water obtained by the solid heat storage type electric hot water generating device 14 to the second heat exchanger 43 of the air conditioning heat exchange device 15 during the heating operation to supply the conditioned air. To heat. As a result, the solid heat storage type electric hot water generator 14 can reinforce the heating capacity of the heat pump device 11 and enhance the heating capacity of the entire air conditioner.

Therefore, it is not necessary to make the heat storage tank 13 have a large capacity based on the heating capacity, and it is not necessary to supplement the heating capacity by using a boiler that uses liquid fuel or the like as fuel. The pollution of can be avoided. Therefore, it is possible to reinforce the insufficient heating capacity of the ice heat storage type heat pump device and to increase the heating capacity by an economical means.

According to the heat storage type air conditioner of the second aspect of the present invention, when the hot water in the heat storage tank 13 is supplied to the heat exchanger 103 for air conditioning, the hot water is reheated by the solid heat type hot water heating device 100. Since the temperature can be raised, even if the heat exchanger 103 of the air conditioning heat exchanger 101 has only one heat exchanger, the solid-state heat storage type hot water heating device 100 reinforces the heating capacity of the heat pump device 11 to enhance the heating capacity. You can

[Brief description of the drawings]

FIG. 1 is a structural explanatory view showing a first embodiment of a heat storage type air conditioner according to the invention of claim 1 in an operating state during cooling.

FIG. 2 is an operation explanatory view showing the heat storage type air conditioner of the embodiment in an operating state during heating.

FIG. 3 is an operation explanatory view showing the heat storage type air conditioner of the same embodiment in a combined operation state of cooling and heating.

FIG. 4 is a structural explanatory view showing a heat storage type air conditioner according to a second embodiment of the present invention.

FIG. 5 is a structural explanatory view showing an embodiment of the heat storage type air conditioner according to the invention of claim 2 in an operating state during cooling.

FIG. 6 is an operation explanatory view showing the heat storage type air conditioner of the embodiment in an operating state during heating.

[Explanation of symbols]

 11 ... Ice heat storage type heat pump device, 13 ... Heat storage tank, 14 ... Solid heat storage type electric hot water generator, 15 ... Air-conditioning heat exchange device, 18 ... First heat exchanger of heat pump device, 19 ... Second of heat pump device Heat exchanger, 20 ... Compressor, 22 ... Freezeable water, 32 ... Solid heat storage body, 33 ... Electric heater, 36 ... Heat exchanger, 42 ... First heat exchanger of air conditioning heat exchange device, 43 ... second heat exchanger of air conditioning heat exchange device, 81 ... heat exchange tank, 92 ... heat exchange medium (antifreeze liquid) 100 ... solid heat storage type hot water heating device, 101 ... air conditioning heat exchange device, 103 ... air conditioning Heat exchanger.

Claims (2)

[Claims] 1. A heat storage type air conditioner for storing cold heat or warm heat by using nighttime electric power and using the cold heat or warm heat for air conditioning during the day, and a heat storage tank for storing freezable water and cooling at night. It is possible to switch between operation and heating operation, and during the cooling operation, the water in the heat storage tank is cooled and heat is stored as cold heat of ice and cold water, and during the heating operation, the water in the heat storage tank is heated and stored as hot water. , A solid heat storage type electric hot water generator that stores heat in a solid heat storage body by using nighttime power and generates hot water by using heat dissipation of the heat storage body in the daytime, and is connected to the heat storage tank by piping Cold water or hot water is circulated and circulated by pumping during the day.
A heat exchanger for air conditioning and a second heat exchanger for air conditioning, which is connected to the hot water generator by piping and hot water generated by the hot water generator is circulated and circulated by pumping during the daytime.
For air conditioning, the air conditioning heat exchanger is arranged on the upstream side with respect to the air flow direction in the case through which the conditioned air flows, and the second air conditioning heat exchanger is arranged on the downstream side with respect to the air flow direction in the case. A heat storage air conditioner comprising a heat exchange device. 2. A heat storage type air conditioner for storing cold heat or warm heat by using nighttime electric power and using the cold heat or warm heat for air conditioning during the day, and a heat storage tank for storing freezing water and cooling at night. It is possible to switch between operation and heating operation, and during the cooling operation, the water in the heat storage tank is cooled and heat is stored as cold heat of ice and cold water, and during the heating operation, the water in the heat storage tank is heated and stored as hot water. An air conditioning heat having a case in which the conditioned air flows and an air conditioning heat exchanger that is arranged in the case and is connected to the heat storage tank by piping to circulate cold water or hot water in the heat storage tank by pumping during the daytime An exchange device and a solid heat storage type hot water heating device that stores heat in a solid heat storage body by using nighttime electric power and heats hot water supplied to the air conditioning heat exchanger by using heat radiation of the heat storage body in the daytime. Equipped with A heat storage type air conditioner characterized by that.