JPS608645A - Operation controlling method of heat source apparatus - Google Patents

Abstract

PURPOSE:To contrive the energy saving operation of the titled apparatus by a method wherein a heat source apparatus is forced to be started or stopped so that the starting temperature and stopping temperature are decided according to the season, also the starting and stopping temperature are deviated simultaneously according to the open air temperature and entropy. CONSTITUTION:A deviation value OA is determined according to the open air temperature thetaOD, formulas 1-4 are calculated with a processor CPU, the starting temperature theta1 and stopping temperature theta2 are simultaneously deviated then an RAM stores the deviated starting temperature theta1 and stopping temperature theta2. When the temperature theta of a heat accumulator tank reaches said temperature theta1 or theta2, a heat pump is made to be FORCED STARTING and FORCED STOPPING. At this time, DELTASP1-DELTASP4 are allowable deviation values for the target value thetaS, those deviation values are predetermined according to the air conditioning conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in an operation control method for a heat source device such as a heat pump used in an air conditioner.

[Prior art]

In air conditioning equipment that has a heat storage tank, if the amount of heat stored in the heat storage tank is insufficient, the heat source equipment for heat storage is generally operated in accordance with the air conditioning load in order to replenish this amount. A start temperature and a stop temperature are set for the heat storage temperature of the tank, and when the heat storage tank temperature reaches the start temperature, the heat source equipment is started, and when the heat storage tank temperature reaches the stop temperature, the heat source equipment is stopped. .

However, according to the conventional means, the starting temperature and the stopping temperature are set semi-fixed, which is inappropriate in relation to the outside temperature, and the heat source equipment is operated unnecessarily, resulting in excessive This has disadvantages such as consuming operating power. This phenomenon is especially noticeable from evening to night when the air conditioning load is reduced.

[Summary of the invention]

The purpose of the present invention is to fundamentally eliminate the drawbacks of the conventional technology, and to set a target value for the heat storage temperature according to the season, and to set a starting temperature and a stopping temperature based on this, Or, an extremely effective heat source device that simultaneously shifts the start temperature and stop temperature according to the enthalpy, and forces the heat source device to start and stop according to the shifted start temperature and stop temperature. The present invention provides an operation control method.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

Fig. 1 is an instrumentation diagram, and shows a heat pump ()I/Pt~)i/P that uses cold water or hot water in a heat storage tank AT as a heat source device.
Pumps Pl to P3 are provided to supply the heat pumps H/P3, and the cold water or hot water supplied by these pumps is supplied to the heat pumps H/P
1 to VP3, it is cooled down during cooling, heated up during heating, and then discharged into the heat storage AT again, depending on the amount of heat storage required. By repeating this process for a certain period of time, the cold water or hot water in the heat storage '4'li AT reaches a predetermined temperature, and heat storage is performed.

In addition, three-way valves v1 to v are provided on the inlet sides of the pumps P1 to P3.
3 is provided, the heat pump H/Pl~H/P mixes cold water or hot water from the vicinity of the discharge port of the heat pump This improves the operating efficiency of I(/P 1~)(/P 3).

In addition, a temperature sensor Tx-T3 is inserted into the heat storage tank AT, and detects the heat storage temperature according to the amount of heat storage in each part. , temperature sensors T4-T6 and T7-T, respectively.
9 is provided, and a temperature sensor 'l'to for detecting the outside air temperature is provided, and these detection forces are controlled by the control unit C.
0NT, and control unit C0NT according to each detected force.
are heat pumps H/p1 to H/P3, pump pl-ps
and controls the three-way valves v1 to v3.

That is, the heat storage operation is generally performed during the discount electricity rate period at night, and the control unit C0NT is activated based on the timing operation.
From heat pump H/PI to H/P3 and pump P
A start signal is sent to temperature sensor T1 to P3.
~The heat storage temperature is monitored according to the detected power of T3, and the heat storage operation is controlled so that the temperature is within the range determined by the predetermined target value and the outside air temperature detected by the temperature sensor TIG. However, the three-way valves v1 to v3 are controlled according to the detected forces of temperature sensors T7 to T9, and the above-mentioned mixing situation is varied, while the temperature in the heat storage tank AT is controlled based on the detected forces of temperature sensors T4 to T6. Predict heat storage temperature changes early, and if the heat storage temperature reaches a point where operation will be stopped, heat pump L/PI~
The amount of heat stored by the heat storage tank AT, which sends a stop signal to H/P3 and pump PI-%-P3 and stops heat storage operation, is the amount required for one day's worth of air conditioning. The amount of heat generated is generally small, and in order to compensate for the shortfall, compensatory operation is performed even outside the discounted power rate period, and in this case, the same control as described above is performed.

The cold water or hot water in the heat storage tank AT is supplied by a pump P4. which operates under the control of a separately provided control device. Ps is supplied to an air conditioner AC1% AC3 such as a fan coil unit via a header H, and is then returned to the heat storage tank AT via these, and this process is repeated.

FIG. 2 is a block diagram of the control unit C0NT, with the processor CPU at the center, fixed memory rtoMS variable memory RAM, keyboard KB, display DP, and interfaces I/F 1 and I/F 2 arranged around it. , connect these to the busbar, fixed memo 1, lROM
The processor CPU executes the instructions stored in the
1G detection power and accepts commands from the keyboard KB as data and stores what is needed in the variable memory RA.
Control decisions are made while accessing M, and the results are sent to each section via the interface I/F2.

Incidentally, a display DP using a character display or the like displays necessary data, making it convenient for monitoring and sweeping.

Figure 3 shows a time schedule showing the status of heat storage operation and compensation operation.
Total loss compensation operation mode M2 in which all H/P3s are operated at the same time, and in order to compensate for sudden changes in air conditioning load,
A quantity control compensation operation mode M3 is defined in which only the required number of heat pumps H/P 1 to I (/P 3) is operated, and a forced stop mode MO is defined for the purpose of cutting peak power consumption. On the other hand, if a day is divided into multiple time periods HB1 to HB4, each time period HBI
- Each mode is assigned to each of HB4, and the operation of heat pump H/Pl-H/P3 is controlled according to this.

In other words, in the example of FIG. 3, the time zone HB
It is possible to enter the heat storage operation mode M1 only in I, and it is only possible to enter the forced stop mode MO in the time period HB3 from 13:00 to 16:00. HB2. In HB4, each mode M2. of total loss compensation operation, number control compensation operation, and forced stop. Ma
, Mo, any one can be selected. FIG. 4 shows that in order to realize the control shown in FIG.
This is a flowchart of the control status performed by the PU.The timekeeping circuit in the processor CPU determines the time zone, determines the mode assigned according to the contents of the variable memory rLAM, and then enters the forced stop mode. “Mo?
If " is Y (YES), it will move to "forced stop", but "MO? ”, the heat storage operation mode Ml?
In response to "Y", the mode shifts to heat storage operation mode M1 operation.

Also, M1? ``Depending on N, 'M2 + M3's driving time on the day > time limit?'', each supplementary driving mode M
2. It is determined whether the M30 total time does not exceed a time limit set based on statistical prediction in advance. If the time is less than the time limit, the surplus compensation driving mode “M2?”
is determined, and if this is Y, same mode M2 operation"
But M2? When `` is N, the number of units control compensation operation mode ``M3 operation'' is established according to the outside temperature.

Note that the time limit (M2+Ma) max is set for each month according to the seasonal changes, for example, as shown in FIG.

In addition, for the heat storage temperature θ of the heat storage tank AT, as shown in Figure 6, a target value θS is determined for each month depending on the season, and the heat pump H/PI-H/P3 is forced to operate based on this target value θS. Starting temperature 01 to start up and heat pump H/P
A stop temperature 02 for forcibly stopping H/P3 is determined, and the heat storage temperature 0 is controlled as shown in FIG. 7 during cooling and as shown in FIG. 8 during heating.

Therefore, in Fig. 4, is the driving time of M2+M3 on the day ≧ the limit time? Determine whether ``is Y or N?'', and if this is Y, perform ``6 forced stop according to Y of θ〈θ2?'', and if ``θ? θ2?'' is N and ”θ〉
θl? "1 forced rise? Jh" is performed in Y, while in N of "air conditioning?", 1θ>θ2? "1 forced stop according to Y of" is performed, and "θ>θ2?" is N and "θ<θl?"
However, the deviation value is determined according to the outside temperature θOD as shown in Fig. 9 corresponding to Fig. 7, and Fig. 10 corresponding to Fig. 8. Once the OA is determined, the processor CPU calculates the following formula, simultaneously shifts the starting temperature θ1 and the stopping temperature θ2, and stores the shifted starting temperature θl and stopping temperature θ2 in the variable memo!J RAM. When the heat storage tank temperature θ reaches this value, the "forced start b" of the heat pumps H/PI to H/P3 is activated.
” and “forced stop.”

(When cooling) θ1=θS+△5PI-OA...-Fist...-(11
θ2=θS-Δ5P2-OA ・・・・・・・−+21
(During heating) θ1=θ8-l＼SP3+□A 118＠11＠＠1
1@ (3) θ2=θs+Δsp 4+OA @#
a * * e e e (In 41 and \, ΔSP
1 to ΔSP4 are allowable deviation values for the target value θS, and are determined in advance according to the empty 1 condition.

Figure 11 is a block diagram of a circuit that performs the operation η of equations (1) to (4). vessel ADD
2, ADD s is supplied to one input of the adder ADD 2 , and the allowable deviation values SP1 to SP4 each having a predetermined polarity are supplied to the adder ADD 2 ,
Since the selectors 5EL1 and 5EL2 select the input according to the signal S/W that is applied to the other input of ADD a and switches between cooling and heating, during cooling, the allowable deviation value +SPI and -8P2 and are each an adder ADD2゜A
The starting temperature θ1 and the stopping temperature θ2 of Equation 21 are sent to each adder ADD z and ADD B, whereas during heating, the allowable deviation value -
8PB and are sent to each individual.

Therefore, the above control can be performed by implementing the same function as shown in FIG. 11 in the processor CPU, or by adding the circuit shown in FIG. 11 to the control unit C0NT. Each temperature θ1.
Since θ2 is determined, the heat pump H/Ps~)(/P3) corresponding to the outside air temperature θOD is operated, and the operating power consumption becomes efficient and the air conditioning conditions are improved.

FIG. 12 shows the control situation performed during cooling for the purpose of supplementing the above-mentioned control.
If `` is Y, then unconditionally ``make the heat pumps H/PI to H/P3 perform forced operation 2 for a certain period of time, determine the deviation value DIF in advance, and then ``θ1-D I F) θ?''
The "forced operation" is repeated for one certain period of time until Y becomes Y, thereby suppressing fluctuations in the heat storage temperature θ.

Although FIG. 12 shows the case of the image layer, similar control may be performed in the case of heating.

Therefore, the heat pump H follows the outside air temperature θOD.
, /Pi to H/P: 1, the amount of heat storage corresponds to the outside temperature θOD, and fluctuations in the amount of heat storage are stabilized, making it possible to perform good air conditioning.

In addition, various operating modes are set and the modes are assigned according to the time of day, so that rational operation in terms of heat storage can be achieved at the lowest possible electricity rate, and the heat source equipment can be operated economically.

However, as a heat source device, heat pump II/Pl ~
H/Pg controllers, boilers, refrigerators, etc. may be used, and the configuration shown in Figure 1 can be selected arbitrarily depending on the conditions. The same is true even if the operation mode is MO~
Various modifications are possible, such as changing the type of M3 and time zone H, or omitting unnecessary steps.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the starting and stopping conditions of the heat source equipment are determined according to the outside air temperature.
In addition to efficient operation, the amount of heat storage is controlled to follow the outside temperature, and air conditioning conditions are suitable, and remarkable effects can be obtained in an air conditioner having a heat storage tank.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is an instrumentation diagram, Figure 2 is a block diagram of the control section, Figure 3 is a time schedule showing the operating status, and Figure 4 realizes the control shown in Figure 3. Flowchart showing the control status of the heat storage, Figure 5 is a diagram showing the setting status of the time limit, Figure 6 is a diagram showing the status of determining the target value of the heat storage temperature, Figures 7 and 8 are the control status of the heat storage temperature. FIG. 9 and FIG. 10 are diagrams showing the setting status of deviation values, FIG. 11 is a block diagram of the arithmetic circuit, and FIG. 12 is a flowchart of complementary control. AT... Heat storage tank, H/PI~H/P3...Φ Heat pump (heat source equipment), P1~p 6@...1 pump,
AC1~ACa・1111・Air conditioner, C0NT・・・・
Control unit, Tl~TIO...Temperature sensor, CPU, controller, φ processor, ROM+1...Fixed memory, RA
M-@--Variable memory, KB11+1... Keychain,
ADDs~ADD 3...Adder, 5ELI, 5E
L211+1・- selector. Patent applicant: Yamatake Honeywell Co., Ltd. Agent: Masaaki Yamakawa (#ji) 1 person) Fig. 5 (Mz + M3) max Fig. 6 out Fig. 7 θ Fig. 8 Fig. 9 A Fig. 10 0Δ υ 5 10

Claims (1)

[Claims] In an operation control method for controlling the start and stop of a heat storage heat source device according to an air conditioning load amount in order to replenish a shortage of heat storage amount, a target value of a heat storage temperature indicating the heat storage amount is determined depending on the season, and A starting temperature for forcibly starting the heat source device and a stopping temperature for forcibly stopping the heat source device are determined based on the temperature, and the starting temperature and the stopping temperature are simultaneously shifted and shifted according to the outside temperature. A method for controlling the operation of a heat source device, characterized in that when the heat storage temperature reaches a start temperature and a stop temperature, the heat source device is forced to start and stop.