JPS62280551A - Heat accumulation type air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) Taisukei is related to the Wakatsuta-type air-speed communication machine, which uses surplus electricity such as night electricity, especially in the summer. Relating to a regenerative air conditioner that stores cold heat and allows the compressor to operate at a low capacity while condensing refrigerant during peak daytime power usage, thereby making it possible to take measures against beakkenft. .

(Prior Art) For example, the one shown in Fig. 4 is known as a heat storage type air conditioner that performs a peak cut function by using a heat storage mechanism during peak power usage in the summer.
(Refer to Publication No.-43732).

In addition to an indoor unit Y having an indoor heat exchanger 4, the heat storage type air conditioner also has a heat storage tank 5 located higher than the indoor unit Y.
is installed, and one or two independent systems of heat transfer pipes 4. for forced circulation refrigerant circuit and natural circulation refrigerant circuit are installed in indoor heat exchanger 4 and heat storage tank 5. ．． 4-2, 6-+, and 6-z, and during normal cooling, the heat transfer pipe 4-2 of the indoor unit Y acts as an evaporator to perform cooling, and when storing cold heat, the heat storage tank 5 is forcedly closed. The heat transfer pipe 6-1 for the circulating refrigerant circuit is used as an evaporator to store cold heat, and when peak power usage is cut, the circuit is switched to the natural circulation refrigerant circuit to stop the compressor 1 and the heat transfer pipe 4 of the indoor unit Y. -2 is used as an evaporator, and the heat transfer pipe line 6-2 of the heat storage tank 5 is made to function as a condenser, and the cold heat stored in the heat storage tank 5 is released to perform cooling, thereby saving energy.

(Problem to be solved by the invention) However, since this device uses the gravity of the refrigerant to transfer the refrigerant, the transfer force for transferring the refrigerant is applied to the upper and lower heads of the heat storage tank 5 and the indoor unit Y. This is a difference, and when packaging the device, the head difference between the two cannot be sufficiently counted, making it difficult to secure capacity.

In addition, since the heat storage tank 5 and the indoor unit Y require two independent heat transfer pipe lines, one for the forced circulation refrigerant circuit and one for the natural circulation refrigerant circuit, as described above, the piping becomes complicated.
Since the required refrigerant is different, a liquid reservoir 36 is required in addition to the liquid receiver 35.
is necessary.

(Means for Solving the Problems) Therefore, the present invention provides a variable capacity electric compressor 1, an outdoor heat exchanger 2,
A heat storage tank 5 is attached to an air conditioner having a refrigerant circuit consisting of a pressure reducer 3 and an indoor heat exchanger 4, and during cold storage heat operation, the outdoor heat exchanger 2 is used as a condenser, and a heat transfer pipe line in the heat storage tank 5 is attached. 6
act as evaporators to store cold heat,
During peak power operation, the compressor 1 is driven at low capacity, the heat transfer pipe 6 is made to act as a condenser to liquefy the refrigerant, and the liquefied refrigerant bypasses the pressure reducer 3 and is transferred to the indoor heat exchanger 4. The piping is configured to function as an evaporator.

(Function) According to the above-mentioned means, the present invention operates the compressor 1 during normal cooling operation, uses the outdoor heat exchanger 2 as a condenser, and uses the indoor heat exchanger square type 4
Each acts as an evaporator to perform normal cooling during times when peak power loads do not occur. When the cooling operation is stopped, for example late at night when cooling is not required, or when the room temperature drops and the cooling thermostat is activated, the indoor unit Y is switched to the heat storage tank 5, and the heat transfer pipe line 6 in the heat storage tank 5 is connected to the evaporator. The heat storage material acts as a cold storage material to store cold heat.

Therefore, when the power load is at its peak, the refrigerant is transferred to the heat storage tank 5.
The liquefied refrigerant bypasses the pressure reducer 3 and is evaporated in the indoor heat exchanger 4 without being depressurized to provide cooling with the same capacity as normal refrigerant. The system operates as a pump that overcomes the resistance of refrigerant piping, resulting in low capacity and reduced power consumption.

(Embodiment) A separate type thermal air conditioner as a preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the separated type thermal air conditioner according to the first embodiment of the present invention shown in FIG. 1, an outdoor unit X and an indoor unit Y are arranged separately into an outdoor unit and an indoor unit. The outdoor unit X houses an electric compressor 1, an outdoor heat exchanger 2, an outdoor fan 15, a heat storage tank 5, and an inverter 16 in a caning.

The heat storage tank 5 has a single heat transfer pipe 6 inside thereof and uses a heat medium having heat therein. The size of the heat storage tank 5 is 100 per compressor output IPS (it is preferable to use one with a capacity of 1st place.In addition, the inverter 16 changes the rotation speed of the compressor 1 to make the capacity of the compressor variable. It is used for

The outdoor unit X connects each of the devices with piping as follows. That is, the gas side terminal 8, the suction side and discharge side of the compressor 1, the outdoor heat exchanger 2, the check valve 9, and the liquid terminal 10 are connected in sequence, and the three-way switching valve 11 and the heat transfer tube of the heat storage tank 5 are connected in sequence. A parallel circuit in which the reversal valve 14 is connected in parallel to the series circuit of the passage 6, the check valve 13, and the expansion valve I2 for heat storage is connected in parallel to the outdoor heat exchanger 2 and the check valve 9. It branches from the gate between IT and the outdoor heat exchanger 2 and is connected between the check valve 9 and the liquid terminal 10.

Therefore, the check valve 9 is directed from the outdoor heat exchanger 2 toward the liquid terminal IO, the check valve 13 is directed from the expansion valve 12 toward the heat storage tank 5, and the check valve 1 = 1 is the heat storage tank. 5 to the liquid terminal 10 or the boat A connected to the tank 5, respectively, to the port B connected between the compressor 1 and the outdoor heat exchanger 2, and to the compressor 1 and the gas side terminal 8. It is configured such that it can be switched and connected to port C connected between the two ports.

On the other hand, indoor unit Y has an indoor heat exchanger 4 and an indoor fan 1.
7. The cooling expansion valve 19 and the solenoid valve 20 are housed in the canong, and the liquid terminal 18, the parallel circuit of one expansion valve and the solenoid valve 20, the indoor heat exchanger 4, and the gas side terminal 2I are connected in sequence. Note that the solenoid valve 20 is opened only during electric power pickup operation, and closed during normal cooling and cold storage heat operation.

The gas terminals 8 and 21 and the liquid terminals 10 and 18 of the outdoor unit X and indoor unit Y are connected to each other to form a circulating refrigerant circuit.

Next, the operation of the refrigerant circuit constructed as described above will be explained. In normal cooling operation during the time when peak power load does not occur in the summer, the compressor 1, the outdoor fan 155, and the indoor fan 17 are each driven, the solenoid valve 20 is closed, and the refrigerant is circulated as shown by the solid line arrow. The outdoor heat exchanger 4 cools the room. When the cooling operation is stopped, for example late at night when cooling is not necessary, or when the room temperature has dropped and the cooling thermostat is activated and the cooling is stopped, the compressor I and the outdoor fan 15 are driven, and the three-way switching valve 11 is activated. Boat A
and boat C, and compressor 1, as shown by the broken line arrow.
outdoor heat exchanger 2, check valve 9, expansion valve 12, check valve 13,
The refrigerant is passed through the heat transfer pipe 6 of the heat storage tank 5, the boat A1 port C of the three-way switching valve 11, and the compressor l, and the outdoor heat exchanger 2 acts as a condenser and the heat transfer pipe 6 acts as an evaporator. , the water serving as the heat storage material 7 is turned into ice to store cold heat.

Next, when the power load is at its peak, power peak-down operation is performed. That is, the compressor l, which has a large electric power consumption, is operated at low speed by the inverter 16 to reduce its capacity, and at the same time, the indoor fan 17 is driven, the solenoid valve 20 is opened, and the boat B and port A of the three-way switching valve 11 are When you communicate with
The refrigerant circulates through the compressor I, the port B of the three-way switching valve 11, the boat A, the heat transfer pipe 6, the reverse valve 14, the solenoid valve 20, the indoor heat exchanger 4, and the compressor I, as indicated by the white arrow. , the gas discharged from the compressor 1 is condensed with water as a heat storage material in the heat transfer pipe line 6 in the heat storage tank 5 and liquefied (approximately 5° C.), and the electromagnetic valve 20 bypasses the expansion valve 19 for cooling the liquid refrigerant. is circulated and evaporated in the indoor heat exchanger 4 without reducing the pressure to cool the room.

Here, the refrigerant is condensed in the heat transfer pipe 6 in the heat storage tank 5, but since the heat storage material 7 is water and has a low temperature, the condensation temperature is also 5°C.
This liquid refrigerant is transferred to the indoor heat exchanger 4 without being depressurized.
Since the compressor IT operates as a pump to transfer the refrigerant, a low capacity is required, and the inverter 16
Even when driven at low speed, the air conditioner can provide sufficient cooling equivalent to normal cooling. For this reason, it goes without saying that it is preferable to use a solenoid valve 20 that has low refrigerant flow resistance when opened.

In the above embodiment, both the cooling expansion valve 19 and the heat storage expansion valve 12 act as the pressure reducer 3, and the expansion valve 19 and the solenoid valve 20 are connected to the indoor unit Y.
Although this is installed inside the outdoor unit X between the check valve 9 and the liquid terminal IO, it is also possible to install it inside the outdoor unit It is.

Next, the second embodiment shown in FIG. Dual-purpose expansion valve 2
5 and the solenoid valve 26, and the check valve 9 and the liquid terminal I.
The expansion valve 25 and the solenoid valve 2 are interposed between the expansion valve 25 and the solenoid valve 2.
The circuit is the same as that of the first embodiment except that it is branched from between 6 and 6 and connected to the heat transfer pipe 6 of the heat storage tank 5 via the electromagnetic valve 27.

Since the solenoid valve 26 of this embodiment and the regenerative air conditioner of the second embodiment of the solenoid valve are constructed as described above, the refrigerant flow during normal cooling, cold storage heat operation, and power peak knot operation is The directions are indicated by the solid arrows in Figure 2, respectively.
The expansion valve 25, which serves both for cooling and for storing cold heat, is connected to the outdoor unit Y. Since the expansion valve I9 and the solenoid valve 20 of the first embodiment are installed inside the outdoor unit Y,
Not only can noise be prevented when the refrigerant circulates indoors, but since most of the equipment can be stored in the outdoor unit X, piping and wiring in the indoor unit Y can be simplified.

It goes without saying that in this embodiment, what functions as the pressure reducer 3 is the expansion valve 25 which serves both for cooling and storing cold heat.

Indeed, the third embodiment shown in FIG.
While the embodiment performs only cooling, this is an air conditioner that performs heating and cooling by adding a four-way valve 30 and other devices to the refrigerant circuit.

That is, in the third embodiment, the four-way switching valve 30 is interposed on the discharge side and the suction side of the compressor I of the first embodiment, and the four-way switching valve 30, the outdoor heat exchanger 2, and the compressor I are A three-way switching valve 3L is connected to the suction side, and an expansion valve 32 for heating is connected in parallel to the check valve 9. This is different from the first embodiment or the second embodiment, except that the check valve 13 is connected between the check valve 13 and the heat transfer pipe 6, and the expansion valve 12 is directly connected to the outdoor heat exchanger 2 without using the check valve 9. Since they are similar, the details of the configuration will be omitted.

Since the cooling operation state of the above-mentioned regenerative air conditioner in summer is almost the same as that of the first embodiment, it will be briefly explained.

First, during normal cooling, the refrigerant is pumped into the compressor 1 as shown by the solid line arrow.
, the four-way switching valve 30, the boat B of the three-way switching valve 31, the same port A, the outdoor heat exchanger 2, the check valve 9, the expansion valve 19, the indoor heat exchanger 4, the four-way switching valve 30, and the compressor 1. It circulates to cool and air the room. Next, during cold storage heat operation, as shown by the broken line arrow, the compressor 1, the four-way switching valve 30, the three-way switching valve 31, the boat B1) A, the outdoor heat exchanger 2, the expansion valve 12, and the check valve I3. , the heat transfer pipe 6 , the boat A of the three-way switching valve 11 , the port C of the three-way switching valve 11 , and the compressor 1 through which the refrigerant flows to store cold heat in the heat storage tank 5 . During power peak shift operation, both the solenoid valve 33 and the solenoid valve 20 are opened, and the refrigerant is transferred to the boat B and port A of the compressor 1, four-way switching valve 30, and three-way switching valve 11 as shown by the white arrows. , the heat transfer pipe 6, the solenoid valve 33, the solenoid valve 20, the indoor heat exchanger 4, the four-way switching valve 30, and the compressor 1, so that the cold heat stored in the heat storage tank 5 is cooled in the indoor heat exchanger 4. Cool the room.

However, during normal heating in winter, as shown by the solid double arrow,
Compressor I, four-way switching valve 30, indoor heat exchanger 4, solenoid valve 2
Heating is performed by circulating refrigerant through the expansion valve 32, the outdoor heat exchanger 2, the boat A of the three-way switching valve 31, the port 1-B of the three-way switching valve 31, the four-way switching valve 30, and the compressor 1. During cold storage heat operation in winter, the compressor 1, four-way switching valve 30, three-way switching valve 11, boat B1 port 1, A-heat transfer pipe 6,
The refrigerant is circulated through the lightning α [33, the expansion valve 32, the outdoor heat exchanger 2, the boat A and the port C of the three-way switching valve 31, and the compressor I, to store heat in the heat storage tank 5.

Also, at the start of heating, compression R1 is shown as a white double arrow.
, four-way switching valve 30, indoor heat exchange company 4, solenoid valve 20,
The expansion valve 32, the outdoor heat exchanger 2, the boat A of the three-way switching valve 31, the same port B, the four-way switching valve 30, and the compressor L, and the expansion valve 32 are connected in parallel to the outdoor heat exchanger 2 and the three-way switching valve 31. An expansion valve 12 (
In this case, use an electric expansion valve and fully open it), reverse valve I
3. Coolant is circulated between the heat transfer pipe 6, the boat A of the three-way switching valve 11, and the port B of the four-way switching valve 30 and the boat B of the three-way switching valve 31, and heat is collected from the outdoor heat exchanger 2. At the same time, the heat stored in the heat storage tank 5 is radiated to rapidly heat the room.
Make heating start up faster.

Note that during the defrost operation, the refrigerant circulation (white arrow) is similar to the heat storage operation during the summer night or when the air conditioner is stopped, so the details will be omitted.

In this embodiment, those acting as the pressure reducer 3 are for cooling,
The expansion valve for heat storage and heating is 19.12°32.

(Effects of the Invention) Since the present invention is configured as described above, it has the following remarkable effects.

In other words, when the summer power load is at its peak, the refrigerant is condensed in the heat transfer pipe 6 by the cold heat stored in the heat storage tank 5.
Since the condensation temperature becomes low and therefore the condensation pressure does not increase, the liquefied refrigerant is evaporated in the indoor heat exchanger 4 without being depressurized by bypassing the pressure reducer 3, and cooling with the same capacity as normal cooling can be performed. Therefore, since the compressor I is operated as a pump that overcomes the refrigerant pipe resistance, the compressor 1, which consumes the largest amount of power, can be driven at a low capacity, thereby reducing power consumption.

Note that if a heat medium having latent heat of fusion, such as water, is used as the heat storage material 7 of the heat storage tank 5, the effect will be significant.

[Brief explanation of the drawing]

Fig. 1, Fig. 2, and Fig. 3 are piping connection diagrams of the first, second, and third embodiments of the regenerative air conditioner of the present invention, respectively, and Fig. 4 is the piping connection diagram of the conventional regenerative air conditioner. It is a piping connection diagram of a harmonizer. l... Compressor 2... Outdoor heat exchanger 3... Pressure reducer 4... Indoor heat exchanger 5... Heat storage tank 6... heat transfer pipe line

Claims (1)

[Claims] 1. A heat storage tank (5 ), and during cold storage heat operation, the outdoor heat exchanger (2) is used as a condenser.
The heat transfer pipes (6) in the heat storage tank (5) act as evaporators to store cold heat, while the compressor (1) is driven at low capacity during power peak shift operation, and the heat transfer pipes (6) acts as a condenser to liquefy the refrigerant, the liquefied refrigerant bypasses the pressure reducer (3), and the indoor heat exchanger (4) acts as an evaporator. A heat storage type air conditioner.