JPS6190064A - Integrating device for power consumption of air-conditioning device - Google Patents

Abstract

PURPOSE:To calculate precisely the electric charge of each room by distributing proportionally electric power to be used by an exterior unit according to the throttle degree of a throttle degree control valve. CONSTITUTION:When an opening-closing valve 15 of one of interior units B-D is open, a refrigerant from the compressor of the exterior unit A flows through the interior unit in the opening state to condition the air in the corresponding room. On the other hand, the refrigerant flows through none of interior units in a closed state and air in the corresponding rooms is neither cooled nor warmed. Then, really necessary rooms are only air-conditioned according to temperatures in rooms that operations of valves 15 of the respective units B-D correspond to. In this case, the proportion of the power consumption of the unit A to the allotted electric power of the units BD is calculated by an arithme tic device 22 and electric charges of the units B-D are calculated precisely.

Description

[Detailed Description of the Invention] (Industrial Application Field) Is the present invention applicable to a single outdoor unit? ! In a so-called multi-type air conditioner in which several indoor units are connected in parallel to each other, a power consumption integration device for an air conditioner is configured to calculate the shared power of each indoor unit with respect to the power consumption of the outdoor unit. Regarding.

<Conventional technology> Conventionally, this type of multi-method air conditioner
For example, as disclosed in Japanese Utility Model Application Publication No. 54-50859, there is a single outdoor unit having a compressor and an outdoor heat exchanger, and a single outdoor unit that is connected in parallel to each other and placed in different rooms. The system is equipped with an indoor heat exchanger and a plurality of indoor units each having an on-off valve for controlling refrigerant flow, and the on-off valve of each indoor unit is controlled to open and close according to the temperature in the corresponding room. It is known that the refrigerant is allowed to flow only to the indoor unit on the side where the on-off valve opens, thereby cooling or heating only a predetermined room that truly requires air conditioning.

(Problems to be Solved by the Invention) By the way, in a high-rise building or the like, a single outdoor unit is installed in a room where equipment is concentrated, and multiple indoor units are installed in multiple rooms with different occupants. In some cases, it is necessary to distribute the power used by the outdoor unit according to the usage status of each indoor unit and calculate the electricity bill for each resident individually.

In that case, in order to calculate electricity charges individually, for example, the operation time of each indoor unit is calculated based on the operation command signal of the operation/stop switch of the indoor unit installed in each room, and the operation time of the outdoor unit is calculated accordingly. One idea is to allocate the power used proportionally, but this idea does not take into account the amount of time the indoor unit will be stopped due to the thermostat being turned off when the room temperature reaches the target room temperature, and the electricity bill will not be calculated accurately. There is a drawback. Moreover, instead of the on-off valve for controlling the refrigerant flow as described above, an electric valve that changes the degree of aperture depending on the difference in width between the room temperature and the target room temperature value! When applied to a variable air conditioning unit equipped with an IJ expansion valve, etc., even if the operating time is the same, the shared power will be calculated as the same amount of power, even though there will be a difference in the shared power depending on the change in air conditioning capacity. As a result, the accuracy of calculating electricity charges will be significantly reduced.

The present invention has been made in view of the above, and its object is to provide a multi-type air conditioner in which the above-mentioned on-off valves and throttle adjustment valves such as electric expansion valves are controlled according to room temperature. By proportionally distributing the power used by the outdoor units according to the degree of aperture of the aperture adjustment valve, the shared power of each indoor unit is made proportional to the refrigerant flow rate of each indoor unit, and the electricity for each room is reduced. The purpose is to accurately determine the price regardless of the indoor unit stop time due to thermo-FF or changes in air conditioning capacity.

(Means for solving the problem) In order to achieve the above object, the solving means of the present invention is as follows:
Compressor (1) and outdoor heat exchanger (3) as shown in the figure
and an indoor heat exchanger (A) connected in parallel to the outdoor unit (A).
10) and a restriction adjustment valve (16) for adjusting the restriction degree of the refrigerant passage area (11 or more indoor units (B))
~(D), and each indoor unit (B)
In an air conditioner equipped with a throttle control means (21) that controls the throttle control valves (16) of (D) according to the respective indoor temperatures, the throttle control means (21)
), the power used by the outdoor unit (A) is proportionally divided into the power to be shared by the corresponding indoor units (B) to (D) according to the throttle control signal value sent to each throttle adjustment valve (16). The configuration includes an arithmetic device (22) for distributing the data.

(Function) As described above, in the present invention, the power consumption of the outdoor unit (A) is reduced by
6), the shared power of each indoor unit (B) to (D) is proportionally distributed according to the throttling degree control signal value to the corresponding indoor unit (B) to (D), respectively. The values are proportional to each other, and each indoor unit (B) ~ (
The electricity charges for each of D) are calculated with high accuracy regardless of the indoor unit stoppage time due to the thermostat being turned off or changes in air conditioning capacity.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 2 onwards.

FIG. 2 shows the first embodiment of the present invention, in which (A) is a single outdoor unit, <8>, (C), and (D) are multiple units (three units) installed in different rooms. ), the outdoor unit (A) has a compressor (1), a four-way switching valve (2), an outdoor heat exchanger (3) having a blower fan (3a), and a reverse heat exchanger (3). a heating expansion valve with a stop valve (4);
A receiver (5) and an accumulator (6) are provided, and each of the devices (1) to 6) has a refrigerant pipe (7)...
are connected to allow refrigerant flow. In addition, the indoor units (B) to (D) have the same configuration, and have an indoor heat exchanger (10
) and a cooling expansion valve (11) with a check valve, and the respective devices (10) and (11) are connected to each other by a refrigerant pipe (12) so that refrigerant can flow therethrough. The indoor units (B) to (D) are connected to the outdoor unit (A) through refrigerant piping (13) so that the refrigerant can circulate in parallel with each other to form a refrigerant circulation system (14). During cooling operation, the four-way switching valve (2) is switched as shown by the solid line to circulate the refrigerant as shown by the solid arrow, thereby transferring the amount of heat absorbed from the indoor air by the indoor heat exchanger (10) to the outdoor heat exchanger. (3) radiates heat to the outside air to cool the room, while during heating operation, the four-way switching valve (2) is switched as shown by the broken line to circulate the refrigerant as shown by the broken line arrow, thereby transferring heat. It is designed to heat the room in reverse.

In addition, each of the above-mentioned indoor units (B) to (D> is equipped with an on-off valve (15) interposed in the refrigerant pipe (12), and the refrigerant passage area is reduced by closing the on-off valve (15). The degree of restriction is adjusted to the degree of restriction of the cooling expansion valve (11) during cooling operation, and to the degree of restriction of the heating expansion valve (4) during heating operation. A restriction adjustment valve that adjusts the restriction of the refrigerant passage area in two stages to fully open the restriction of the area.
16).

Furthermore, each of the indoor units (8) to (D) includes a room temperature sensor (20), which is arranged near the indoor heat exchanger (10) and includes a thermistor or the like, for detecting the indoor temperature;
The on-off valve (15) receives the output of the room temperature sensor (2o).
) is provided. The throttle control means (21) starts operating in response to an operation command signal from a run/stop switch (not shown) installed in the corresponding room, and during this operation, the throttle control means (21) receives an operation command signal from a room temperature sensor (20). The room temperature signal 1a (tO) is compared in size with the room temperature target value ([S) set by the person in the room, etc., and the room temperature signal 101 (tO) is greater than or equal to the room temperature target value (ts) (to≧
When the room temperature signal value (tO) is lower than or equal to the room temperature target value (ts) (to≦ts), an open command signal δ (“1” signal) is output to the on-off valve (15). By controlling the opening of the on-off valve (15), the flow of refrigerant to the corresponding indoor unit is allowed to cool or heat the corresponding room, while the on-off valve (15) is opened at times other than when the above-mentioned cooling is requested or heating is requested. 15) by outputting a close command signal (a "0" signal) to control the opening, thereby blocking the flow of refrigerant to the corresponding indoor unit and stopping cooling or heating in the corresponding room. .

Then, an opening command signal δ of each aperture control means (21) is provided.
i (i = B, C, D) is input to an arithmetic device (22) which is a feature of the present invention. The arithmetic unit (22
) is an outdoor unit (A) whose electric power for driving the compression 1 (1) of the outdoor unit (A>) and the blower fan (3a) of the outdoor heat exchanger (3) is measured with a wattmeter (23).
Each indoor unit (B') for the power consumption (wO) of
The power consumption (WO>
Calculate by proportionally distributing each aperture degree υJI [1 means (21) open command signal δi (aperture control signal value) inputted above, and integrate this over time using the following formula % formula % After calculating the integrated value Wi of the shared power of each indoor unit (B) to (D), this is stored in the storage device (24
).

Therefore, in the first embodiment, when the on-off valve (15) of any one of the plurality of (three) indoor units (B) to (D) is closed, the outdoor unit (A>
The refrigerant discharged from the compressor (1) flows to the indoor unit on the side where the closing operation is performed, and the corresponding indoor unit is cooled or heated. Refrigerant does not flow through the indoor unit, and the corresponding room is not cooled or heated. Then, each indoor unit (B
) - (D) Each time the operation of the on-off valves (15) is switched to the open state or open state according to the temperature in the corresponding room, the refrigerant flow to the corresponding indoor unit is also sequentially switched, and true air conditioning is achieved. Only rooms that require air conditioning are cooled or heated.

In that case, the shared power (wi) of each indoor unit (B) to (D) with respect to the power used (WO) of the outside unit (A)
is calculated by the arithmetic unit (22) from each indoor unit (B) to (
It is calculated by proportionally distributing the power consumption (wi) of the outdoor unit (△) according to the open command signal (δ1) to the on-off valve (15) in D), so each shared power (wi) is calculated as follows: Each indoor unit (B
) to (D) are calculated with high accuracy.

Furthermore, FIG. 3 shows a second embodiment of the present invention, in which the orifice adjustment valve (16) in the first embodiment is constructed with an electric expansion valve instead of the on-off valve (15). be. still,
The same parts as in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted.

That is, each of the indoor units (B) to (D) is provided with a level adjustment valve (16') which is a cooling type fJJ expansion valve and which is installed in the refrigerant pipe (12). At the same time, the aperture control means (21') includes a room temperature sensor (
20) room temperature signal value (to) and room temperature target value (ts)
By calculating the deviation (to-ts) from
When s) is 7 or more (to-ts O), the opening signal v1 is set according to the difference (-), and when the deviation (to-ts) is less than 7 (to-ts<Q), it is fully opened. Opening signal v corresponding to
i is output to the aperture adjustment valve (16') to control the sentence in the meantime.

In addition, the arithmetic device (22') is connected to each indoor unit (B
) to (D), the power consumption (wQ) of the outdoor unit (A) is determined as the opening signal (Vi) of the aperture control means (21') based on the following formula (% formula %). It is calculated by proportionally distributing the amount accordingly. still,
In the figure, 25 is an electric expansion valve for heating provided in the outdoor unit (A>).

Therefore, in the second embodiment, when cooling each room, the aperture adjustment valve (1) of each indoor unit (8) to (D) is
6'), when the deviation (to-ts) between the temperature (to) and the temperature target value (ts) in the corresponding room is large, the degree of aperture increases and the refrigerant flow rate increases, and the air conditioning in the corresponding room increases. While the capacity increases, the above deviation (to-ts
) is small, the degree of aperture also becomes small, the flow rate of refrigerant decreases, and the corresponding indoor air conditioning capacity decreases.

In this case, the shared power (wl) of each indoor unit (B) to (D) with respect to the power used (WO) of the outdoor unit (A)
is calculated by proportionally distributing the power consumption (wO) of the outdoor unit (A) according to the opening signal (vi) of each calibration level adjustment valve (16'), so this shared power (wi) is The electricity bill for each indoor unit (B) to (D) is a value that corresponds to the flow rate of refrigerant in each indoor unit (B) to (D), that is, a value that takes into account changes in the air conditioning capacity in each room. It will be calculated with high accuracy.

In the second embodiment, each indoor unit (B) to (D
) was calculated according to the opening signal (vi) to each proof adjustment valve (16'). It may be calculated accordingly. However, when calculating according to the opening signal (vi) as in the second embodiment, the shared power (wi) is made to correspond well to the cold ts flow rate of each indoor unit (B) to (D>). Therefore, it is possible to further improve the calculation accuracy of shared power (wt).

(Effects of the Invention) As explained above, according to the present invention, the power shared by a plurality of outdoor units with respect to the power used by a single outdoor unit is reduced by the throttle control valve provided in each indoor unit. It is calculated by proportional distribution of the power used by the outdoor units according to the control signal value, and the value is determined according to the refrigerant flow rate of each indoor unit, so it is possible to stop operation or change the air conditioning capacity due to the thermo-FF of each indoor unit. Regardless of the situation, the electricity charges for each indoor unit can always be calculated with high accuracy, making it convenient to use.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 and 3 show embodiments of the present invention, FIG. 2 is a refrigerant piping system diagram showing the first embodiment, and FIG. 3 is a refrigerant piping system diagram showing the second embodiment. (A)...Outdoor unit, (B), (C), (D)...
...Indoor unit, (1)...Compressor, (3)...
Outdoor heat exchanger, (10)... Indoor heat exchanger, (15)
...Opening/closing valve, (16), (16')... Throttle adjustment valve, (21>, (21')... Throttle control means, (22), (22')... Calculation Device.

Claims (1)

[Claims] (1) A single outdoor unit (A) having a compressor (1) and an outdoor heat exchanger (3), and an indoor heat exchanger (10) connected in parallel to the outdoor unit (A) and a throttling adjustment valve (1
6), and the aperture adjustment valves (16) of each of the indoor units (B) to (D) are adjusted according to the corresponding indoor temperature. In an air conditioner equipped with an aperture control means (21), the output of the aperture control means (21) is received and the outdoor air conditioner is controlled according to the aperture control signal value to each aperture adjustment valve (16). A power usage integration device for an air conditioner, comprising a calculation device (22) that proportionally allocates the power usage of a unit (A) as shared power to the corresponding indoor units (B) to (D).