JPS6346330A - Heat exchanger of heat pump type - Google Patents

Abstract

PURPOSE:To realize an energy-saving operation in the title heat exchanger, by comparing the actual power consumption integrated by an integrating wattmeter at the intermediate point of a predetermined period with the interim target value set by a pattern setter of power consumption, and by automatically correcting the operating capacity of thermal cycles downwardly when the actual power consumption exceeds the interim target value. CONSTITUTION:A controller 28 compares the actual power consumption W1 which is an integrated result by an integrating wattmeter 29 at the intermediate point of a predetermined period with an interim target value Wp set by an electric power consumption pattern setter 30 in the intermediate point of time. When the actual power consumption W1 exceeds the interim target value Wp, an operating capacity in terms of the air-cooling and air- dehumidifying capacity, the air-heating capacity, or the heat regenerating capacity of thermal cycles of a heat exchanger 10 is automatically corrected downwardly. A downward correction to the operating capacity of a heat exchanger 10 is taken place by lowering or stopping the number of revolution of an electric compressor 15, and by lowering or stopping the number of revolution of electric fans 19 and 22 which are incorporated in each heat exchanger 18 and 21. With such an arrangement the finally integrated amount of electric power consumption in a predetermined period can be controlled to within a predetermined final target value range.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a heat pump type heat exchange device.

[Prior Art] Conventionally, a heat pump type heat exchange device as described in JP-A-59-138FI8 has been used.

This heat pump type heat exchange device includes an electric compressor, a heat exchanger installed indoors, a heat exchanger installed in a heat storage tank,
A thermal cycle is formed by the 111 tension means and a heat exchanger installed outdoors. In other words, this heat exchange device is
■Cooling and dehumidifying by switching and setting the heat medium circulation circuit corresponding to each operation mode such as cooling dehumidification mode, ■heating mode, and ■thermal storage mode, and circulating the heat medium through the heat medium circulation circuit by driving the electric compressor. , heating, and heat storage operation.

[Problems to be Solved by the Invention] By the way, the above-mentioned heat cycle effectively utilizes outside air heat, indoor exhaust heat, surplus heat in a heat storage tank, etc. by circulating a heat medium to perform cooling/dehumidifying, heating, and heat storage operations. This is done by driving an electric compressor to circulate the heat medium, or driving an electric blower built into each heat exchanger to promote heat exchange in each heat exchanger. etc., it is necessary to consume a certain amount of power. Therefore, when using a heat pump type heat exchange device as described above, each operation of cooling/dehumidifying, heating, and heat storage should be performed within the range that does not result in excessive electricity consumption charges for the electricity consumed within a certain period of time. desired. In particular, since the power usage fee per unit increases step by step as the amount of power consumed increases, energy-saving operation is desired.

An object of the present invention is to control the operation of a thermal cycle so that the amount of power consumption accumulated within a certain period of time can be kept within a predetermined range.

[Means for Solving the Problems] The present invention implements a heat cycle using an electric compressor, a heat exchanger installed indoors or in a heat storage tank, an expansion means, and a heat exchanger installed outdoors. In the heat pump type heat exchange device to be constructed, a power integrator that integrates the power consumption over time during a certain period of the heat cycle, and a final target value for the power consumption in the above-mentioned certain period are determined, and a A power consumption pattern setter that determines an intermediate target value of power consumption at a point in the middle of the specified period so that the amount of power consumed does not exceed the final target value; and a power integration meter at a point in the middle of the specified period. The actual power consumption, which is the integration result, is compared with the intermediate target value of the power consumption pattern setter at the intermediate point in time, and when the actual power consumption exceeds the intermediate target value, the operating capacity of the thermal cycle is automatically lowered. and a controller for correction.

[Function] According to the present invention, a heat cycle is formed by the electric pressure machine, the heat exchanger installed indoors and at least in the heat storage tank, the expansion means, and the heat exchanger installed outdoors, and the power consumption is reduced. The heat medium is circulated between each heat exchanger while the electric compressor is driven, and by effectively utilizing outside air heat, indoor exhaust heat, excess heat in the heat storage tank, etc., it can be used for cooling and dehumidification, heating, or heat storage. At least one of each operation will be performed.

Here, in implementing the present invention, the actual power consumption, which is the integration result of the power integrator at a point in the middle of a certain period, is compared with the intermediate target value of the power consumption pattern setter at the point in time, and the actual power consumption is When the amount exceeds the target value midway, the operating capabilities such as the cooling/dehumidifying capacity, heating capacity, or heat storage capacity of the heat cycle are automatically revised downward. This downward adjustment of operating capacity is due to a reduction in the rotation speed or stoppage of one electric pressure unit I: A reduction in the rotation speed or stoppage of the electric blower, etc. built into each heat exchanger to promote heat exchange in each heat exchanger. achieved by. As a result, the power consumption gradient that the power consumption after the intermediate point in time forms over time is made gentler, and the power consumption that is finally accumulated over a certain period of time is kept within the range of the predetermined final target value. It can be accommodated.

[Example] Fig. 1 is a schematic diagram showing a cooling and dehumidifying mode of a heat pump type heat exchange device to which the present invention is applied, Fig. 2 is a schematic diagram showing a heating mode with the same heat pump type heat exchange device, and Fig. 3 is a schematic diagram showing a heating mode with the same heat pump type heat exchange device. is a schematic diagram showing the heat storage mode of the heat pump type heat exchange device,
FIG. 4 is a diagram showing the relationship between the power consumption pattern and actual power consumption in the present invention, and FIG. 5 is a block diagram showing the control system of the present invention.

The heat pump type heat exchange device io shown in FIGS. 1 to 3 includes a cooler 11. It includes an indoor unit 12, an outdoor unit 13, and a heat storage tank 14.

The cooler 11 includes an electric compressor 15, a four-way switching valve 16, an il
It is equipped with a t-dynamic expansion valve 16A and an accumulator 17. The indoor unit 12 includes a heat exchanger 18, an electric blower 19, and a dehumidifying pan 20. The outdoor unit 13 includes a heat exchanger 21,
An electric blower 22 is provided. The heat storage tank 14 includes heat exchangers 23 and 24, as well as a pump 25 and a water heater 2.
It is equipped with 6. That is, the heat exchange device 10 includes a compressor 15 .of the cooler 11 . Expansion valve 16, accumulator 17
, heat exchanger 18 of indoor unit 12, heat exchanger 2 of outdoor unit 13
1. A heat cycle is formed by heat exchangers 23 and 24 of heat storage 4fi14. 27A to 27F are electromagnetic on-off valves.

The heat exchanger R1O is equipped with a controller 28 consisting of a microcomputer or the like. The controller 28 controls the expansion valve 16 and the on-off valves 27A to 27A.
27F is switched and controlled to form a heat medium circulation circuit for each operation mode, and the compressor 15, expansion valve 16. Electric blower 19.2
2 to drive and control the heat cycle in each operation mode.

Here, each operation mode of the heat exchanger IO will be explained as follows.

■ Cooling dehumidification mode (Fig. 1) The controller 28 sets the switching valve 16 as shown in Fig. 1, opens the on-off valves 27A, 27C to 27F, and switches on the on-off valve 27B.
By closing, a heat medium circulation circuit for cooling/dehumidifying mode is formed. As a result, the high-pressure high-temperature heat medium from the compressor 15 passes through the heat exchanger 21 of the outdoor unit 13 by the switching valve 16 to radiate heat to the outside and is asra, and passes through the heat exchanger 23 of the heat storage tank 14 to the heat storage tank. After the heat is radiated to the water in 14 and condensed, it passes through the expansion valve 16A and is transferred to the heat exchanger 18 in the room 41112.
The indoor air is cooled by evaporation. In this mode, the indoor air is dehumidified by collecting moisture in the indoor air that liquefies in contact with the surface of the heat exchanger 18 into the dehumidifying pan 20.

The cooling and dehumidifying ability of the heat exchange device 10 can be achieved by: (1) increasing the number of revolutions of the compressor 15 to increase the amount of heat medium circulation;
Alternatively, the capacity can be increased, that is, upwardly adjusted, by increasing the rotational speed of the blower 22 of the outdoor unit 13 to increase the amount of heat medium condensed in the heat exchanger 21, thereby increasing the amount of heat radiated to the outside.

■Heating mode (Fig. 2) The controller 28 sets the switching valve 16 as shown in Fig. 2, opens the on-off valves 27A, 27C to 27F, and closes the on-off valve 27B.
By closing, a heat medium circulation circuit for heating mode is formed. As a result, the high-pressure high-temperature heat medium from the compressor 15 passes through the heat exchanger 18 of the indoor unit 12 by the switching valve 16, radiates heat indoors and condenses, and then passes through the expansion valve 16A to the outdoor unit 12.
It passes through the heat exchanger 21 of No. 3 to absorb and evaporate outside air heat, and passes through the heat exchanger 23 of the heat storage tank 14 to the heat storage tank 14.
absorbs the heat of the water and evaporates it, warming the indoor air.

In addition, the heating capacity of the heat exchanger lO is as follows: ■Compressor 15
A method of increasing the amount of heat medium circulation by increasing the number of rotations of the fan 22 of the outdoor unit 13, or increasing the amount of heat medium evaporated in the heat exchanger 21 by increasing the number of rotations of the blower 22 of the outdoor unit 13, thereby increasing the amount of outside air heat absorbed. The performance can be increased or adjusted upward by the method of

■Heat storage mode (Fig. 3) The controller 28 sets the switching valve 16 as shown in Fig. 3, opens the on-off valves 27B, 27C, and 27E, and closes the on-off valve 27A.
, 270.27F, a heat medium circulation circuit in heat storage mode is formed.

As a result, the high-pressure high-temperature heat medium from the compressor 15 passes through the heat exchanger 24 of the heat storage tank 14 by the switching valve 16, radiates heat to the water in the heat storage tank 14 and condenses, and then passes through the expansion valve 16A to the outside. The outside air heat is absorbed through the heat exchanger 21 of a13, evaporated, and stored in the wood of the heat storage tank 14.

In addition, the above heat exchange equipment! The heat storage capacity of 110 is ■Compressor 1
A method of increasing the number of rotations of the outdoor unit 13 to increase the amount of heat medium circulation, or a method of increasing the number of rotations of the air blower 22 of the outdoor unit 13 to increase the amount of heat medium evaporation in the heat exchanger 21 to absorb outside air heat. Capacity is increased or revised upward by increasing the amount.

Thus, the heat exchange device 10 includes a power integrator 29 and a power consumption pattern setting device 30. The power integrator 29 measures the power consumption during a certain period of the heat cycle (for example, one month), that is, the power consumption used to drive the compressor 15, the blower 19 of the indoor unit 12, and the blower 22 of the outdoor unit 13. Accumulate over time. As shown in FIG. 4, the power consumption pattern setter 30 determines the final target value Wa of the power consumption amount in the above-mentioned fixed period, and also sets the power consumption amount W actually consumed in the fixed period to the final target value W as shown in FIG. In order to match the curve Wa, the intermediate target value of the power consumption amount at a point in the middle of the certain period is determined, for example, as a value on the one-dot chain line shown in FIG. The horizontal axis in FIG. 4 indicates the number of days that have passed.

Note that the intermediate target value set in the power consumption pattern setting device 30 is the zero point and the final target value W in FIG. 4 at the initial stage.
Although it is determined as the value on the dashed-dotted line connecting a,
After the initial phase has passed, a correction is made by the controller 28.

That is, the controller 28 sets a new interim target value after the intermediate point in time based on the integration result of the power totalizer 29 at an intermediate point in the certain period, that is, the actual power consumption amount W1, based on the actual power consumption value shown in FIG. It can be corrected to a value on the two-dot chain line connecting the consumption amount Wt and the final target value Wa.

Here, the controller 28 compares the actual power consumption amount Wt, which is the integration result of the power 81 calculator 29 at a point in time during a certain period, with the intermediate target value Wp of the power consumption pattern setting base 30 at the point in time, and When the power consumption μWl exceeds the intermediate target value Wp, the operating capabilities such as cooling/dehumidifying ability, heating ability, or heat storage ability of the heat cycle of the heat exchanger IO are automatically revised downward.

The downward adjustment of the operating torque in the heat exchanger 10 includes lowering or stopping the rotational speed of the electric compressor 15, and reducing the rotation speed of the electric compressor 15,
8.21 for each heat exchanger 18.
This is achieved by reducing or stopping the rotation speed of the electric blower 19, 22, etc. included in the air blower 21. As a result, the power consumption gradient that the power consumption after the intermediate point in time forms with respect to the passage of time is made gentle, and the power consumption that is finally accumulated over a certain period of time is adjusted to the predetermined final target value. can be kept within the range.

In the implementation of the present invention, if the indoor units 12 are installed in multiple rooms or multiple heat storage tanks 14 are installed, as a method for downwardly adjusting the operating capacity of the heat cycle,
The number of rooms to which cooling/dehumidification and heating are applied is reduced, and the circulation of the heat medium to the heat exchanger 18 installed in the reduced number of rooms is reduced or stopped.
The number of heat exchangers 2 of the heat storage tank 14 reduced by reducing the number of heat exchangers 2
A method of reducing or stopping the circulation of the heat medium to No. 3 may be adopted.

In addition, in order to encourage electricity consumers to save on electricity consumption, electricity consumption is subject to a rate system that increases the unit price of electricity as the cumulative amount of electricity consumed over a certain period of time increases. Therefore, it is economical to select the final target value set in the power consumption pattern setting device within a range that does not exceed the highest consumption amount within the same unit price category.

[Effects of the Invention] As described above, the present invention forms a thermal cycle by an electric compressor, a heat exchanger installed indoors or in a heat storage tank, an expansion means, and a heat exchanger installed outdoors. In the heat pump type heat exchange equipment, a power integrator that calculates the power consumption V over time during a certain period of the heat cycle; a power consumption pattern setter that determines an intermediate target value of power consumption at a point in the middle of the certain period so that the amount of power actually consumed in the period does not exceed the final target value; The actual power consumption, which is the integration result of the power totalizer, is compared with the intermediate target value of the power consumption pattern setter at the relevant intermediate point in time, and when the actual power consumption exceeds the intermediate target value, the thermal cycle operation ability is automatically adjusted. and a controller for downward adjustment. Therefore, the operation of the thermal cycle can be controlled so that the amount of power consumption accumulated within a certain period of time can be kept within a predetermined range.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the cooling and dehumidifying mode of a heat pump type heat exchanger to which undeveloped Ill is applied, Figure 2 is a schematic diagram showing the heating mode of the heat pump type heat exchanger, and Figure 3 is a schematic diagram showing the heating mode of the same heat pump type heat exchanger. A schematic diagram showing the heat storage mode of the heat exchange device, the fourth trace is a diagram showing the relationship between the power consumption pattern and the actual power consumption in the present invention, and FIG. 5 is a block diagram showing the control system of the present invention. lO... Heat exchange device, 11... Cooler, 12...
Indoor unit, 13... Outdoor unit, 14... Heat storage tank, 15.
...Compressor, 16A...Expansion valve, 18.21.23.
... Heat exchanger, 28 ... Controller, 29 ... Power integrator, 30 ... Power consumption pattern setter. Patent applicant: Sekisui Chemical Co., Ltd. Representative Hiroshi 1) Kaoru

Claims (2)

[Claims] (1) In a heat pump type heat exchange device that forms a heat cycle by an electric compressor, a heat exchanger installed indoors or in a heat storage tank, an expansion means, and a heat exchanger installed outdoors, A power integrator that integrates power consumption over time over a certain period of time, and a final target value for power consumption in the above-mentioned certain period are determined,
a power consumption pattern setter that determines an intermediate target value for power consumption at a point in the middle of the certain period so that the actual power consumption during the certain period does not exceed the final target value; The actual power consumption, which is the integration result of the power integrator at the time, is compared with the intermediate target value of the power consumption pattern setter at the intermediate point in time, and when the actual power consumption exceeds the intermediate target value, the thermal cycle operating capacity is determined. A heat pump type heat exchange device, characterized in that it has a controller that automatically adjusts downward. (2) A patent in which the controller has a function of correcting the intermediate target value set in the power consumption pattern setting device after the intermediate point in time based on the actual power consumption at the intermediate point in the above-mentioned certain period. A heat pump type heat exchange device according to claim 1.