JPH0213744A - Operation control device for heat storage airconditioner - Google Patents

Abstract

PURPOSE:To make effective use of heat storage and hence improve a capacity factor by taking measures to decide which has a higher heating capacity either regeneration collection operation or ordinary heating operation. CONSTITUTION:A detector P1 detects a heating capacity when an outdoor heat exchanger 3 and a heat exchange coil 13 are used while a detector Th1 detects a required heating capacity. When the heating capacity detected by a comparator 53 where the heat exchanger 3 is used exceeds the heating capacity available when the heat exchange coil 13 is used, and it exceeds the required heating capacity even if it is smaller than the heating capacity available where the heat exchange coil 13 is used, the ordinary heating operation is carried out. Then, a ordinary heating capacity, a heat storage collection capacity and a required load in proportion to each temperature are calculated based on the stored contents of a first to third memory means 23 to 25, having received the output of the room temperature detector Th1, th open air temperature detector Th2, and the heat storage detector Th3. When the comparator 53 indicates that the ordinary heating capacity exceeds the heat storage collection capacity, or is less than the heat storage collection capacity, but exceeds the required load, the ordinary heating operation is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an operation control device for a regenerative air conditioner equipped with a heat storage tank, and particularly to measures for improving the efficiency of use of stored heat.

(Prior Art) Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 59-208367, a refrigerant circuit connected to a compressor, an outdoor heat exchanger, a pressure reduction mechanism, and an indoor heat exchanger is provided, and the outdoor heat exchanger A bypass path that temporarily bypasses the refrigerant circuit is provided in the liquid pipe between the heat exchanger and the indoor heat exchanger, and a heat exchange coil of the heat storage tank is interposed in the bypass path. By arranging heat exchange coils in series, during heating operation of the equipment, depending on the heating load, the heat exchange coil is used as an evaporator when the heating load is large, and the heat exchange coil is used as a condenser when the heating load is small. It is known that attempts are made to reduce power consumption by doing so.

Furthermore, as disclosed in JP-A-61-125555, for example, a heat exchange coil of a heat storage tank is interposed in a bypass pipe that bypasses between a liquid pipe and a gas pipe of a refrigerant circuit similar to the above, that is, an outdoor By arranging a heat exchange coil in parallel with the heat exchanger and the indoor heat exchanger, for example, during heating operation, the refrigerant condensed in the indoor heat exchanger is directly evaporated in the heat exchange coil, thereby utilizing heat storage. There are also known devices that attempt to obtain high heating capacity.

(Problems to be Solved by the Invention) By the way, in the former of the above-mentioned conventional devices, since the heat storage coil is arranged in series with the outdoor heat exchanger and the indoor heat exchanger, the indoor heat exchange is not performed during heating operation. The condensation occurs through heat exchange between the refrigerant once condensed in the refrigerant and the heat storage medium, and the condensation effect is small. Therefore, if you try to increase the effect of reducing power consumption by storing a large amount of warm heat with the heat storage medium in the heat storage tank, as in the latter case,
It is desirable to arrange the heat exchange coil in parallel with the outdoor heat exchanger and the indoor heat exchanger.

However, during heat storage recovery operation to recover heat stored in the heat storage tank,
When the evaporation capacity decreases due to a decrease in the amount of heat storage, the evaporation capacity of the heat storage coil may become lower than the evaporation capacity of the outdoor heat exchanger. In such a case, the heating capacity of the indoor heat exchanger will be insufficient, and if the heat storage and recovery operation is continued as it is, there is a risk that the feeling of air conditioning will be impaired.

The present invention has been made in view of the above, and its purpose is to advantageously utilize heat storage by providing a means for determining which heating capacity is higher between heat storage recovery operation and normal heating operation. The aim is to improve the utilization rate.

(Means for Solving the Problem) In order to achieve the above object, the solving means of the present invention includes a compressor (1), an outdoor heat exchanger (3), and an indoor heat exchanger (6), as shown in FIG. ), and a heat storage tank (12) containing a heat storage medium capable of storing heat and heat.
Liquid pipe (8c) and gas pipe (8d) of the refrigerant circuit (10)
The heat storage tank (
A heat exchange coil (13) that exchanges heat between the heat storage medium and the refrigerant (12), and a pressure reduction mechanism (4) that reduces the pressure of the refrigerant to the outdoor heat exchanger (3) and the heat exchange coil (13) during heating operation. ) and [17).

As an operation control device for the air conditioner, during heating operation, the refrigerant is circulated so that the refrigerant condensed in the indoor heat exchanger (6) is evaporated in the outdoor heat exchanger (3). operation route and a heat storage recovery heating operation route in which the refrigerant condensed in the indoor heat exchanger (6) circulates so as to evaporate in the heat exchange coil (13) of the bypass path (16). a connection switching mechanism (51); a preliminary operation control means (52) for controlling the connection switching mechanism (51) to perform normal heating operation after performing heat storage recovery operation for a predetermined time; The outdoor heat exchanger (3) and the heat exchange coil (13) during operation by the control means (52)
heating capacity detection means (P1) that detects the heating capacity when used as an evaporator, required capacity detection means (T h1) that detects the required indoor heating capacity based on room temperature, and the required capacity detection means (T h1) and the output of the heating capacity detection means (P1), the required heating capacity and the outdoor heat exchanger (
2) as an evaporator and a comparison means (53) for comparing the heating capacity when the heat exchange coil (13) is used as an evaporator; receiving the output of the comparison means (53); When the heating capacity when the heat exchange coil (3) is used as an evaporator and the required heating capacity are both greater than the heating capacity when the outdoor heat exchanger (3) is used as an evaporator, the above heat storage recovery heating operation is performed. and an operation control means (54) for controlling the operation of the connection switching mechanism (51) so that normal heating operation is performed at other times.

Furthermore, as shown in FIG. 2, the second solution is based on the same air conditioner as the first solution, and uses the same connection switching device as the first solution as its operation control device. A mechanism (51), a room temperature detection means (Th1) for detecting the indoor air temperature, an outside temperature detection means (Th2) for detecting the temperature of the outdoor air, and a temperature of the heat storage medium in the heat storage tank (12). a heat storage temperature detection means (T h3) for detecting the temperature of the heat storage medium; a first storage means (23) for storing the normal heating operation capacity using the outdoor air temperature and the indoor air temperature as parameters; a second storage means (24) for storing the heat storage recovery heating capacity as a parameter, a third storage means (25) for storing the required load for heating using the indoor air temperature and the set temperature as parameters, and each of the above-mentioned detection means ( 'T
h1), (Th2), and (Th3), each storage means (23) at the corresponding temperature;
Normal heating capacity from the memory contents of (24) and (25),
Calculation means for calculating heat storage recovery heating capacity and required load (
55), a comparison means (53) which receives the output of the calculation means (55) and compares the normal heating capacity, the heat storage recovery heating capacity, and the required load; The connection switching mechanism (5) is configured to perform the heat storage recovery heating operation only when the recovery heating capacity and the required load are greater than the heat storage recovery heating capacity, and to perform the normal heating operation at other times.
1) is provided with an operation control means (54) for controlling the operation of step 1).

(Function) With the above configuration, in the invention of claim (1), the operation of the connection switching mechanism (51) is controlled by the preliminary operation control means (52), and the refrigerant is condensed in the indoor heat exchanger (6). , After waiting for a predetermined time for the heat storage recovery heating operation in which the heat is circulated so as to evaporate in the heat exchange coil (13) of the bypass path (16),
The refrigerant condensed in the indoor heat exchanger (6) is transferred to the outdoor heat exchanger (
In step 3), a normal heating operation is performed in which the air is circulated to evaporate. At that time, the heating capacity detection means (P1) detects the heating capacity when using the outdoor heat exchanger (3) and the heat exchange coil (13), and the required capacity detection means (T h1) detects the required heating capacity. be done. And comparison means (5
3), their sizes are compared and the operation control means (
54), when the heating capacity when using the outdoor heat exchanger (3) is greater than the heating capacity when using the heat exchange coil (13), and when the heating capacity when using the outdoor heat exchanger (3) The capacity is smaller than when using the heat exchange coil (13) (
However, when the required heating capacity is exceeded, normal heating operation is performed, so heat storage is saved in case it is needed. on the other hand,
If the heating capacity when using the first coil (13) is larger than the heating capacity when using the outdoor heat exchanger (3), heat storage recovery heating operation is performed, so that the feeling of air conditioning is not impaired. do not have.

Therefore, the heat storage can be used advantageously while maintaining the necessary air conditioning effect, and its utilization efficiency is improved.

In addition, in the claimed invention, the calculating means (55) detects the room temperature detecting means (Th1) and the outside temperature detecting means (Th1).
2) and the output of the heat storage temperature detection means (Th3), the normal heating capacity and heat storage recovery heating corresponding to each temperature are determined based on the stored contents of the first to third storage means (23) to (25). Capacity and required load are calculated, and their magnitudes are compared by comparison means (53). And the above claim (
With the same effect as in the invention of 1), the operation control means (54) controls whether the normal heating capacity is greater than or equal to the heat storage recovery heating capacity, or even if the normal heating capacity is smaller than the heat storage recovery heating capacity, it is greater than or equal to the required load. , normal heating operation is performed in both cases. Therefore, without performing preliminary operation, the above claim (1)
), the same effect as the invention can be obtained.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 3 onwards.

FIG. 3 shows the overall configuration of an air conditioner according to an embodiment of the invention of claim (1), in which two indoor units (B) and (C) are connected to one outdoor unit (A). A so-called multi-type air conditioner is configured. The above outdoor unit (A) includes a compressor (1), a first four-way switching valve (2) that switches the connection as shown in the solid line in the figure during heating operation, and as shown in the broken line in the figure during cooling operation, and an outdoor heat exchanger (3) that sometimes functions as a condenser and as an evaporator during heating operation; a first electric expansion valve (4) that functions as a pressure reduction mechanism that adjusts the refrigerant flow rate during cooling operation and reduces the pressure of the refrigerant during heating operation; An accumulator (7) for separating liquid refrigerant in the suction gas to the compressor (1) and a receiver (9) for storing the liquid refrigerant are arranged as main equipment. In addition, each of the above indoor units (B) and (C) has the same configuration, and includes a second electric expansion valve (5) that reduces the pressure of the refrigerant during cooling operation and adjusts the flow rate of the refrigerant during heating operation, and An indoor heat exchanger (6), which sometimes functions as an evaporator and functions as a condenser during heating operation, is arranged as the main equipment. The above-mentioned devices (1) to (7) and (9) are sequentially connected through refrigerant piping (8) so that the refrigerant can flow, and the refrigerant is converted to air through heat exchange with air in the outdoor heat exchanger (3). A main refrigerant circuit (10) is configured that applies the applied heat to indoor air using an indoor heat exchanger (6).

On the other hand, the outdoor unit (A) and the indoor unit (B),
A heat storage unit (D) equipped with a heat storage tank (12) containing water as a heat storage medium is arranged between the heat storage tank (C) and the heat storage tank (12). A first coil (13) as a heat exchange coil for exchanging heat with the medium inside the piping, and a second coil (13) for supercooling the refrigerant.
14) are provided. In addition, the main refrigerant circuit (1
The refrigerant of the refrigerant circuit (10) is routed from the receiver (9) interposed in the liquid pipe (8c) of the refrigerant circuit (10) to the gas pipe (8d) side of the gas pipe (0).
A first bypass path (16) that bypasses to the 8d) side is branched, and the heat storage tank (16) is connected to the first bypass path (16).
2), a first coil (13) is provided between the first coil (13) and the liquid pipe (8c).
A third electric expansion valve (
17) is provided.

Here, the second four-way switching valve (19) is connected to the first four-way switching valve (2) on the gas pipe (8d) side of the heat storage unit (D).
) is arranged in parallel with the second four-way switching valve (19).
Therefore, the gas pipe side end of the first bypass path (16) is connected to the discharge line (8a) and suction line (8b) of the compressor (1).
) and are switchably connected.

Note that the flow of refrigerant in the liquid pipe (8c) of the heat storage unit (D) is controlled to open and close.

A first electromagnetic on-off valve (11) is interposed, and a second bypass path (18) that bypasses the main refrigerant circuit (10) branches from both ends of the first electromagnetic on-off valve (11). A second electromagnetic on-off valve (15) for controlling the opening and closing of the refrigerant flow and a second coil (14) of the heat storage tank (12) are provided in the bypass path (18).
) is provided.

On the other hand, various sensors are installed in the device (T
h1) is placed in each indoor unit (B) and (C), and detects the indoor air temperature from the temperature of the air sucked into the indoor heat exchanger (6) to determine the temperature difference (Ts) from the set temperature Ts.
-Ta) is a room temperature sensor as a required capacity detection means for detecting the required heating capacity Tcs corresponding to
2) The set temperature Ts is stored in the built-in memory (not shown).
For each step of the temperature difference (Ts - Ta) set at 1° C. intervals between the temperature difference (Ts - Ta) and the room temperature Ta, the required heating capacity is calculated in advance as the condensing temperature Tcs and stored.

Table 1 Also, (P1) is attached to the discharge pipe (8a) of the compressor (1), and from the high pressure value, the heating capacity Tel and the heat exchange coil (13 ) is used as a heating capacity detection means for detecting the heating capacity Tc2 when each of the above-mentioned sensors (Th1) is used.
, (Th1) and CP1) are connected to a controller (22) for controlling the operation of the entire device so that signals can be input.

In addition, (20) is a capillary tube interposed between the connection boat (19d) of the second four-way switching valve (19) and the suction line (8b), and (21a) to (21e) are refrigerant tubes. This is a manual on-off valve installed at the outdoor unit (A) entrance and exit of the pipe (8).

Above 1st. Second. Third electric expansion valve (4).

(5), (17) opening degree control, 1st. Second electromagnetic on-off valve (
11), (15) and switching of the first and second four-way switching valves (2) and (19), circuit connections can be made according to the operation mode such as heat storage operation for heating and cooling, heat storage recovery operation, etc. A connection switching mechanism (51) for switching is configured.

To explain its operation, during the heat storage operation in which warm heat is stored in the heat storage tank (12), as shown in FIG. Second
The four-way switching valves (2) and (19) are switched to the solid line side in the diagram,
The operation is performed while the second electromagnetic on-off valve (15) is closed and the opening degree of the first electric expansion valve (4) is appropriately adjusted.

That is, the discharged gas is transferred from the second four-way switching valve (19) to the first four-way switching valve (19).
It flows to the bypass path (16) side, is condensed in the first coil (13), is depressurized in the first electric expansion valve (4), and is circulated to be evaporated in the outdoor heat exchanger (3) (Fig. (see middle arrow), the first coil (13) imparts warm heat to water, which is a heat storage medium in the heat storage tank (12), through heat exchange with the refrigerant.

In addition, in order to prevent refrigerant from accumulating in the indoor heat exchanger (6), the first electromagnetic on-off valve (11) is opened, and the second electric expansion valve (5) is also slightly opened. .

Also, during normal heating operation, as shown in FIG. Normally, the second four-way switching valves (2) and '(19) are switched to the solid line side in the figure, and the first solenoid on-off valve (11) is open and the second solenoid on-off valve (15) is closed. Heating operation is performed. That is, the discharged refrigerant flows through the main refrigerant circuit (1
0), is condensed in the indoor heat exchanger (6), is depressurized in the first electric expansion valve (4), and is evaporated in the outdoor heat exchanger (3) (see arrow in the figure). By doing so,
Each indoor unit (B) and (C) heats each room in which it is installed. Note that the third electric expansion valve (17) is closed during normal operation.

During the heat storage recovery heating operation in which the heating operation is performed using the heat of the heat storage medium stored as described above, as shown in FIG. Second four-way switching valve (2), (19)
are switched to the solid line side in the figure, and the first electric expansion valve (4
) is closed and the first. Second electromagnetic on-off valve (11), (15)
is opened and closed in the same manner as during normal heating operation, and operation is performed while appropriately adjusting the opening degree of the third electric expansion valve (17). That is, the refrigerant condensed in the indoor heat exchangers (6), (6) flows from the main refrigerant circuit (10) to the first bypass path (16).
) side, the pressure is reduced by the third electric expansion valve (17), and the heat storage tank (12) is evaporated by the first coil (13) (see arrow in the figure). The heat storage in (12) is used to increase the low pressure of the compressor (1) to improve operating efficiency.

Next, the operation control performed by the controller (22) will be explained.

FIG. 7 shows a control flow according to the invention of claim (1), in which the circuit connection is switched by the connection switching mechanism (51) in step S1 to perform heat storage recovery heating operation, and in step S2 the circuit connection is switched for a predetermined period of time (for example, 10 minutes). Wait until the temperature has passed, and in step S3, calculate the saturation temperature (hereinafter referred to as condensation temperature) equivalent to the condensing pressure from the signal of the high pressure sensor (P1), that is, the sardine 1
The heating capacity when using the coil (13) is input as Te2. Thereafter, in step S4, the connection switching mechanism (5 units) is switched to perform normal heating operation, and in step S5, similarly to step S3, the condensing temperature at that time, that is, the outdoor heat exchanger Input the heating capacity when using (3) as Tel. After that,
In step S6, the heating capacities T el and T c2 when using the first coil (13) and the outdoor heat exchanger (3) input in steps S3 and S5 are compared, and the heating capacities T e
If l≧Tc2, it is determined that there is little heat stored in the heat storage tank (12) and the heating capacity is insufficient, and the process proceeds to step S7, where normal heating operation is performed. On the other hand, Tel<Tc2
In this case, it is determined that there is a surplus in the amount of heat stored in the heat storage tank (12), and the process proceeds to step S6. In step S8, the heating capacity Tel when using the outdoor heat exchanger (3) is further determined.
The temperature difference between the indoor air temperature Ta and the set temperature Ts (Ts
-Ta), and if Tel≧Tcs, it is determined that there is no need to use the stored heat, and the outdoor heat exchanger (3) is used in step S9. The normal heating operation is performed while inputting the heating capacity Tel, and only when TCl<TeS, the process moves to step S1 and the heat storage recovery heating operation is performed for a predetermined time, and the above flow is repeated thereafter.

In the above flow, step 31. S2 and S4 constitute a preliminary operation control means (52) that controls the connection switching mechanism (51) to perform normal heating operation after performing heat storage recovery heating operation for a predetermined time,
In steps S5 and S8, the outputs of the room temperature sensor (required capacity detection means) (Th1), (Th1) and the high pressure sensor (heating capacity detection means) CP1) are received, and the required heating capacity TC8s outdoor heat exchanger (3) and the Comparison means (5
3) is configured. Also, steps S1 and S7
Based on the output of the comparison means (53), heating capacity Tc2 and required heating capacity Tcs when using the first coil (13) are both heating capacity Tci when using the outdoor heat exchanger (3). an operation control means (5) for controlling the operation of the connection switching mechanism (51) so as to perform the heat storage recovery heating operation when the value is larger than , and to perform the normal heating operation at other times;
4) is configured.

Therefore, in the invention of claim (1), the operation of the connection switching mechanism (51) is controlled by the preliminary operation control means (52), the refrigerant is condensed in the indoor heat exchanger (6), and the refrigerant is condensed in the indoor heat exchanger (6). After a heat storage recovery heating operation in which the refrigerant is circulated so as to evaporate in the heat exchange coil (13) of A normal heating operation in which the air is circulated is performed. At that time, the heating capacity detection means (P1) detects the outdoor heat exchanger (
3) heating capacity Tel and heat exchange coil (1
3) is detected, and the total required heating capacity Tcs is detected by the required capacity detection means (Th1) and (Th1). Then, the comparison means (53) compares their magnitude, and the operation control means (54) determines that the heating capacity Tel when using the outdoor heat exchanger (3) is the same as when using the first coil (13). When the heating capacity is equal to or higher than Te2, normal heating operation is performed without performing heat storage recovery operation. In addition, an outdoor heat exchanger (3
), the heating capacity Tel is the first coil (13)
Even if the required heating capacity Tcs is smaller than the heating capacity Tel when using the outdoor heat exchanger (3), heating operation is normally performed, so heat storage is necessary. It will be saved in case of emergencies. On the other hand, heating capacity Tc2 when using the first coil (13)
When the heating capacity Tel is larger than the heating capacity Tel when using the outdoor heat exchanger (3), the heat storage recovery heating operation is performed, so that the air-conditioned feeling is not impaired.

Therefore, the most advantageous operation can be selected while maintaining the air conditioning effect, and heat storage can be used effectively.

In addition, in the above embodiment, a single high pressure sensor (P1) is arranged as a heating capacity detection means, but the outdoor heat exchanger (3)
It may be arranged separately on the first coil side and the first coil side, or the heating capacity may be detected by detecting the evaporation capacity with a pressure sensor or the like that detects low pressure.

Also, instead of the two pressure reducing mechanisms (4) and (17),
Liquid pipe (8) between receiver (9) and outdoor heat exchanger (3)
It is also possible to connect the first bypass passage (16) to c) and arrange a single electric expansion valve or the like in the liquid pipe (8c) between the connection part and the receiver (9).

Next, an embodiment of the invention of claim (a) will be described.

FIG. 8 shows the overall configuration of the air conditioner of the second embodiment according to the invention of claim (2), and the basic refrigerant circuit is the same as that of the first embodiment.
This is similar to the example. Here, in this example, the first
Room temperature sensor (
Th1), (Th1) function as a room temperature detection means, and in addition to that, the air suction port of the outdoor heat exchanger (3) is equipped with an outside temperature detection means for detecting the outdoor air temperature To from the intake air temperature. An outside air temperature sensor (Th2) is disposed in the heat storage tank (12), and a water temperature sensor (Th3) as a heat storage temperature detection means for detecting the temperature of water, which is a heat storage medium, is disposed in the heat storage tank (12).

Further, the controller (22) includes a first memory (23) as a first storage means for storing the normal heating capacity Q1 of the outdoor heat exchanger (3) using the indoor air temperature Ta and the outside air temperature To as parameters. and a second memory (24) as a second storage means for storing the heat storage recovery heating capacity Q2 of the first coil (13) using the heat storage medium temperature Tr and the indoor air temperature Ta as parameters, and the room temperature Ta and the set temperature. Required load Q using the temperature difference (Ts - Ta) from Ts as a parameter.

A third memory (25) for storing .

Here, examples of the contents of each of the memories (23) to (25) are shown in Tables 2 to 4 on the next page, respectively. That is, in Table 2, the required load Qo is calculated and stored in advance for each step of the temperature difference (Ts - Ta) set at 1°C intervals between the set temperature TS and the room temperature Ta. There is. In addition, in Table 3, for each indoor temperature Ta value, the normal heating capacity Q as the heat exchange capacity of the outdoor heat exchanger (3) is calculated from the value of the outside air temperature To (1°C unit).
1 is calculated and stored in advance. As shown in Table 4, for each indoor temperature Ta, the heat storage medium temperature T
The heat storage recovery heating capacity Q2 as the heat exchange capacity of the first coil (13) is calculated in advance from the value of r (in units of 1°C),
remembered.

Also in this embodiment, the switching mechanism (51
) and the flow of the refrigerant in each operation mode are the same as in the first embodiment shown in FIGS. 4 to 6 above.

Next, the control of the invention of claim ('2J) will be explained based on the flowchart of FIG. 9. In step So, the room temperature Ta is detected, and in step S12, the temperature difference (Ts -Ta ) based on the required load Q
Calculate and determine D. Similarly, in steps SI3+SI4, the outside air temperature TO is detected and the normal heating capacity Q+ is predicted, and in step 5151516, the heat storage medium temperature Tr is detected and the heat storage recovery heating capacity Q2 is predicted. Then, in step S+7, normal heating capacity Q1
is compared with the heat storage recovery heating capacity Q2, and if Q1≧Q2, normal heating operation is performed in step S+8, while (h
If <Q2, the normal heating capacity Q1 is further compared with the required load Qo in step SI9, and Q+ <Qo
If so, the heat storage recovery heating operation is performed in step 926, and if not, the normal heating operation is performed in step S2+, and then the process returns to step Sl and repeats the above flow.

In the above flow, the above step S! 2. By S14 and 516, each of the above sensors (detection means) (Th1)
, (Th2), (Th3),
each memory (storage means) (23) at a corresponding temperature;
Calculating means (55) for calculating normal heating capacity, heat storage recovery heating capacity, and required load from the memory contents of (24) and (25)
) is configured and step S! 7 and Sl9 receive the output of the calculation means (55) and calculate the normal heating capacity QC1.
Comparison means (53) is configured to compare the magnitudes of the heat storage recovery heating capacity Q2 and the required load Qo. In addition, by steps S's, Sn and S2+, the comparison means (5
In response to the output of 3), the connection switching mechanism (51 ) to control the operation control means (
54) is configured.

Therefore, in the second embodiment, the calculation means (55) detects the room temperature detection means (Th1), (Th1), the outside temperature detection means (Th2), and the heat storage temperature detection means (T
h3), the first to third memories (storage means)
Based on the memory contents of (23) to (25), the normal heating capacity Q1, heat storage recovery heating capacity Q2, and required load Qo corresponding to each temperature are calculated, and their magnitudes are compared by the comparing means (53). . With the same effect as the invention of claim (1) above, the operation control means (54) controls whether the normal heating capacity Q1 is greater than or equal to the heat storage recovery heating capacity Q2 or when the normal heating capacity Q1 is higher than the heat storage recovery heating capacity Q2. Even if the load is smaller than the required load Qo, normal heating operation is performed in both cases. Therefore, the same effect as the invention of claim (1) above can be obtained, and there is particularly an advantage that an appropriate operation mode can be determined in advance without performing a preliminary operation.

In addition, the above 1. Although both the second embodiment and the multi-type air conditioner have been described, it goes without saying that the present invention can be similarly applied to a so-called bare type air conditioner in which one outdoor unit and one indoor unit correspond to each other.

(Effect of the invention) As explained above, according to the invention of claim (1), the heat exchange coil of the heat storage tank is arranged in parallel with the outdoor heat exchanger of the refrigerant circuit, and the normal heating operation and heat storage recovery are performed. During heating operation of an air conditioner configured to be able to switch between heating operation, when heat storage recovery heating operation and normal heating operation are sequentially performed in preliminary operation, and the outdoor heat exchanger and heat exchange coil detected at that time are used. Heat storage recovery is performed only when the heating capacity and required indoor heating capacity when using a heat exchange coil are greater than the heating capacity when using an outdoor heat exchanger as an evaporator. Since the heating operation is performed, it is possible to improve the utilization efficiency of heat storage while maintaining a good air-conditioned feeling.

Further, according to the invention of claim (a), the room temperature, outside air temperature, and heat storage medium temperature are detected, and the normal heating capacity, heat storage recovery heating capacity, and required load, which are set in advance using these as parameters, are predicted, and these Claim (1) above by comparing the values
Since the operation control is performed based on the same judgment as in the invention of claim (1), it is possible to obtain the same effect as the invention of claim (1) without performing preliminary operation.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 represent claims (1) and (2), respectively.
2) is a block diagram showing the configuration of the invention; FIG. 3 to 7 show an embodiment of the invention of claim (1), FIG. 3 is a refrigerant system diagram showing the overall configuration, and FIGS. 4 to 6 show heat storage operation, normal heating operation, and FIG. 7 is a flowchart showing the details of control; FIGS. 8 and 9 show an embodiment of the invention of claim 2; FIG. A refrigerant system diagram showing the configuration, and FIG. 9 is a flowchart showing the details of control. (1) Compressor, (3) Outdoor heat exchanger, (4
)...First electric expansion valve (pressure reduction mechanism), (6)...Indoor heat exchanger, (8c)...Liquid pipe, (8d)...Gas pipe, (10)...Main Refrigerant circuit, (12)... Heat storage tank, (13)... First coil (heat exchange coil), (16
)...first bypass path, (17)...third electric expansion valve (pressure reducing mechanism), (23)...first memory (first storage means), (24)...second memory (second storage means),
(25)...Third memory (third storage means), (51)
... Connection switching mechanism, (52) ... Preliminary operation control means, (53) ... Comparison means, (54) ... Operation control means, (55) ... Calculation means, (P1). ... High pressure sensor (heating capacity detection means), (T h1)... Room temperature sensor (required capacity detection means, room temperature detection means), (T h2)
...Outside temperature sensor (outside temperature detection means), (T h3)
...Water temperature sensor (thermal storage temperature detection means). ]O Figure 4 c main - Issouko route) Figure 3 Figure 9 Figure 7

Claims (2)

[Claims] (1) A refrigerant circuit (10) formed by connecting a compressor (1), an outdoor heat exchanger (3), and an indoor heat exchanger (6), and a heat storage tank (12) containing a heat storage medium capable of storing heat and heat. ) is interposed in the bypass path (16) between the liquid pipe (8c) and the gas pipe (8d) of the refrigerant circuit (10), and the heat storage tank (12)
A heat exchange coil (13) that exchanges heat between the heat storage medium and the refrigerant
), and a pressure reduction mechanism (4) that reduces the pressure of the refrigerant to the outdoor heat exchanger (3) and heat exchange coil (13) during heating operation.
, (17), during heating operation, the refrigerant is circulated such that the refrigerant condensed in the indoor heat exchanger (6) is evaporated in the outdoor heat exchanger (3). The normal heating operation route and the refrigerant condensed in the indoor heat exchanger (6) are transferred to the heat exchange coil (13) in the bypass route (16).
A connection switching mechanism (51) that selectively switches to a path of heat storage recovery heating operation that circulates so as to be evaporated in A preliminary operation control means (52) that controls the normal heating operation, and the outdoor heat exchanger (3) and the heat exchange coil (13) are used as an evaporator during operation by the preliminary operation control means (52). a heating capacity detection means (P_1) that detects the heating capacity of the room; a required capacity detection means (Th1) that detects the required indoor heating capacity based on the room temperature; the required capacity detection means (Th1) and the above-mentioned heating capacity detection means. Comparison that receives the output of (P_1) and compares the required heating capacity, the heating capacity when the outdoor heat exchanger (2) is used as an evaporator, and the heating capacity when the heat exchange coil (13) is used as an evaporator. means (53) and the comparison means (5
3), the heating capacity when the heat exchange coil (13) is used as an evaporator and the required heating capacity are both larger than the heating capacity when the outdoor heat exchanger (3) is used as an evaporator. The above connection switching mechanism (
51) An operation control device for a regenerative air conditioner, comprising an operation control means (54) for controlling the operation of the regenerative air conditioner. (2) A refrigerant circuit (10) formed by connecting a compressor (1), an outdoor heat exchanger (3), and an indoor heat exchanger (6), and a heat storage tank (12) containing a heat storage medium capable of storing heat and heat. ) is interposed in the bypass path (16) between the liquid pipe (8c) and the gas pipe (8d) of the refrigerant circuit (10), and the heat storage tank (12)
A heat exchange coil (13) that exchanges heat between the heat storage medium and the refrigerant
), and a pressure reduction mechanism (4) that reduces the pressure of the refrigerant to the outdoor heat exchanger (3) and heat exchange coil (13) during heating operation.
, (17), during heating operation, the refrigerant is circulated such that the refrigerant condensed in the indoor heat exchanger (6) is evaporated in the outdoor heat exchanger (3). The normal heating operation route and the refrigerant condensed in the indoor heat exchanger (6) are transferred to the heat exchange coil (13) in the bypass route (16).
a connection switching mechanism (51) that selectively switches to a heat storage recovery heating operation route that circulates so as to evaporate, a room temperature detection means (Th1) that detects indoor air temperature, and an outdoor Stores an air temperature detection means (Th2), a heat storage temperature detection means (Th3) that detects the temperature of the heat storage medium in the heat storage tank (12), and normal heating operation capacity using outdoor air temperature and indoor air temperature as parameters. The first storage means (
23), and a second storage means (24) that stores the heat storage recovery heating capacity using the heat storage medium temperature and the indoor air temperature as parameters.
), a third storage means (25) for storing the required heating load using the indoor air temperature and the set temperature as parameters, and a third storage means (25) that receives the outputs of the above-mentioned detection means (Th1), (Th2), and (Th3) and takes appropriate action. Each storage means (23), (
Calculating means (55) for calculating normal heating capacity, heat storage recovery heating capacity, and required load from the memory contents of 24) and (25);
and receiving the output of the calculation means (55), the normal heating capacity,
Comparing means (53) for comparing the magnitude of the heat storage recovery heating capacity and the required load, and receiving the output of the comparison means (53), performs heat storage recovery heating only when the heat storage recovery heating capacity and the required load are larger than the heat storage recovery heating capacity. and an operation control means (54) for controlling the operation of the connection switching mechanism (51) so that normal heating operation is performed at other times. Device.