JPH03276813A - Air conditioner control device - Google Patents

Abstract

PURPOSE:To stabilize the temperature control for multiple air conditioners by obtaining control data as the sum of proportional terms with independent values for individual segment spaces and the integrated term with a common value for all segment spaces, comparing them with the reference data, and controlling the air conditioning for individual segment spaces. CONSTITUTION:The compartment of a bus vehicle is virtually divided into four regions (1)-(4), for example, air conditioners 10(i) (i=1-4) are installed for individual regions respectively, and operations of them are controlled by a controller 2. Temperature sensors 15(i) for detecting the respective segment space temperature in the compartment are arranged at positions assumed to represent the temperature of the regions (1)-(4). The controller 2 performs the proportional processing on the deviations between the detected temperatures of the regions (1)-(4) and the target temperature and also integration processing spacial average deviation between the temperature of the space to be airconditioned and the target temperature to obtain the control data and compares the control data with the preset reference data to operate the air conditioners 10(i).

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a device that virtually divides an air-conditioned space into a plurality of regions and controls air conditioning for each divided region.

[Conventional technology]

(1) The applicant has proposed a method in which the deviation between the detected temperature of the air-conditioned space and the target temperature is subjected to proportional integral processing, and the heating capacity and cooling capacity of the air conditioner are controlled based on the data obtained as a result. (Japanese Unexamined Patent Publication No. 61232912). In the above publication, the proportional integral process calculates the deviation EN as EN4-TN-Tset (TN: detected temperature, Tset: target temperature), and calculates the internal variable KE given as an initial value "0".
This is a process in which N is sequentially updated for each process, such as KEN-KEN+EN, and based on these, control data Y is obtained as Y4-AxEN+BxKEN (A: constant of proportionality, B: constant of integration). The control data Y is compared with a predetermined reference pig and converted into data governing the air conditioning capacity. That is,
The data is converted into data for operating the heating means and cooling means of the air conditioner so as to realize the above-mentioned air conditioning capacity. In other words, the proportional integral process is such that the area of the shaded area in Figure 6 is set to "0", that is, the detected temperature TN is changed to the target temperature T.
This is a process for obtaining the control amount of the air conditioner such that it converges to set. (2) A relatively large space such as the interior of a bus is virtually divided into a plurality of regions, and an air conditioning (heating and/or cooling) device is installed in each region. This is because a single air conditioner may not be able to sufficiently air condition a wide space.

[Problems to be solved by the invention]

Virtually divides a relatively large air-conditioned space into multiple areas,
There is a desire to install air conditioners in each area and realize air conditioning based on proportional integral processing. However, if air conditioners are installed in each air-conditioned space that is not insulated from each other, like the virtual partitioned space above,
If air conditioning control is performed independently based on proportional integral processing, each compartment will be affected not only by the air conditioner installed in its own compartment, but also by the air conditioners installed in other compartments. Become. Furthermore, the temperature detected by each air conditioner differs depending on the solar radiation distribution and the like. Originally, the meaning of control using the integral term (the BxKENO term) is to cause the time average of temperature to converge to the set temperature. Therefore, when the temperature of the space is stably controlled to the set temperature, the value of the integral term oscillates in a minute interval between a positive value and a negative value near zero. However, if the detected temperature of your own air conditioner is directly affected by the output of another air conditioner for a long time, or if only the temperature sensor of your air conditioner is exposed to intense sunlight for a long time, , the above integral term will swing largely in the direction of one sign. In this state, when the effects of other air conditioners and local solar radiation disappear, the integral term oscillates largely around zero, gradually decreasing its amplitude over a long period of time until it reaches around zero. Eventually, the temperature control becomes stable. In this way, it takes time for the air conditioner to stabilize, so if the influence of other air conditioners or local solar radiation frequently occurs, the temperature control by that air conditioner will always be unstable, and the set temperature will be affected. Reproducibility becomes poor. Also, if air conditioners are constantly influencing each other, it is thought that the vibration of the integral term will become large.
There is a problem that the stability of temperature control deteriorates and the temperature distribution changes greatly depending on the location. The present invention has been made in view of such circumstances, and is an object of the present invention to stabilize temperature control by a plurality of air conditioners.

[Means to solve the problem]

The present invention includes temperature detection means installed at predetermined locations in each compartment, air conditioning means installed at predetermined locations in each compartment, target temperature input means, detected temperature and target temperature in each compartment. a calculation means for obtaining control data by performing proportional processing on the deviation between the temperature of the air-conditioned space and the target temperature and integral processing on the spatial average deviation between the temperature of the air-conditioned space and the target temperature; The air conditioning control device includes a control means for operating each air conditioning means. In the above, the air conditioning means is a device that has air heating means and/or cooling means and whose operation is controlled by a control means. In addition, the proportional processing for the deviation EN (i) between the detected temperature TN (i) and the target temperature Tset in each segmented space (j) is as follows: EN (i) ← TN (i) −Ts e t as EN (i) This is the process of finding the proportional term AXEN (i) of the control data by multiplying it by the proportionality constant A. In addition, the integration process for the spatial average deviation ENav between the temperature TN of the air-conditioned space and the target temperature Tset is performed by converting the internal variable KEN into the latest average deviation as follows: K E N = K E N + E N a v This is a process of updating with ENav and multiplying it by an integral constant B to obtain an integral term BxKEN of control data.

[Effect]

As described above, in the device of the present invention, the air conditioning of each compartment is independently controlled based on control data. Further, the control data is given as the sum of a proportional term AXEN (i) that is an independent value for each partitioned space and an integral term BXKEN that is a common value for all partitioned spaces. In other words, integral term data that is affected by the output of other air conditioners is made common to all partitioned spaces. Therefore, even if there is interaction between the air conditioners in each compartment, the temporal stability of the controlled temperature and the stability of the spatial temperature distribution can be improved.

【Example】

The present invention will be explained in detail below. (1) Configuration of Example Device FIG. 1 is an explanatory diagram of the layout of the example device, and FIG. 2 is a block diagram showing the configuration of the control circuit of the device. As shown in the figure, in this embodiment, the cabin of a bus vehicle is virtually divided into four regions (1), (2), (3), and (4), and air conditioners 10 (i) (i = 1 to 4 (hereinafter the same) are respectively installed, and their operations are controlled by the control unit 2 (controlling CPU 20, etc.). Each air conditioner 10(i) includes an evaporator 12(i) as a cooling means and a heater core 11(i) as a heating means.
, and a blowing fan 13(i) as a blowing means. The evaporator 12(i) cools the air by exchanging heat with the refrigerant circulating in the refrigeration cycle, which is composed of "compression means → outdoor heat exchange means → pressure reduction means → indoor heat exchange means (evaporator) → compression means" . The degree of cooling (temperature of the blown air) is adjusted by the drive circuit 12d(i) by controlling an electromagnetic clutch that connects and connects the compression means (compressor) and the prime mover of the bus. The heater core 11(i) heats air using the cooling water of the prime mover. The degree of heating (blowing air temperature) is
The drive circuit 11d(i) causes the heater core 11 of the cooling water to
(i) It is adjusted by controlling a solenoid valve that cuts off and on the supply. The blower fans send cooled and/or heated air to the respective compartments. The amount of air blown is by a fan motor of 13m (
i) is controlled and adjusted by the drive circuit 13d (i). Note that the above three types of drive circuits 12d (i), 11d
(i) and 13d (i) are each controlled by a control signal from the CPU 20. On the other hand, a temperature sensor 14 (i) that detects the temperature of the blown air is arranged at the air blowing position of each air conditioner, and the detected temperature signal of each temperature sensor 14 (i) is sent to the detection circuit 14 s (i). After being processed, it is input to the CPU 20. In addition, temperature sensors 15 (i ) is arranged, and the detected temperature signal of each temperature sensor 15(i) is sent to the detection circuit 15s(i).
After being processed, the data is input to the CPU 20. Note that 16(i) is a temperature adjustment volume for commanding the target temperature, and the designated target temperature signal is input to the CPU 20 after being processed by the processing circuit L6S(i). As described above, the CPU 20 executes proportional calculation and integral calculation based on the input blowing air temperature, vehicle interior temperature, and target temperature, and based on the data obtained as a result, the CPU 20 calculates the electromagnetic clutch, electromagnetic valve, and determines the control amount of the fan motor and outputs a control signal to each drive circuit. Note that 21 is a ROM in which a control program etc. for the above control is stored, and 22 is a ROM that stores a predetermined table 1. This is a working RAM that stores table 2 and the like and is backed up by a battery. (2) Control in the Example Device Next, control by the present device will be explained in accordance with the processing by the CPU 20. FIG. 3 is a flowchart showing an outline of the processing in the CPU 20, and FIGS. 4 and 5 show step 5 in FIG.
31.333 is a characteristic diagram illustrating processing. The CPU 20 starts processing, for example, by turning on the main switch of the air conditioner. In step 311, initial setting processing is performed. For example, 0m is assigned as the initial value of the internal variable KEN. It also sets the count value of a delay timer (described later). In step S13, a routine timer for managing the execution time of one routine of this process is started. In step S15, the CPU waits for the delay timer to count up. The delay timer is a timer counter that manages the time interval at which the control of this device is repeated, and is counted for each routine of this process, and counts up when the counted value reaches the value set in step Sll. The following control (817-535) is executed by the count-up. First, in step S17, the delay timer is reset and started. Next, in step S19, the vehicle interior temperature sensor 15 (i), the outlet air temperature sensor 14 (i), and the target temperature setting volume 16 (
Perform input processing of each signal from i). In step S21, the average temperature inside the vehicle is determined. That is, from the temperature of each region mentioned above (the temperature detected by the vehicle interior temperature sensor 15(i)), TNav=(ΣTN(i))
/4 (i=1 to 4), the average value TNav of the vehicle interior temperature is calculated, and the variable TN
Assign to av. In step S23, a spatial average deviation (see claims) is determined. That is, the target temperature Tset and the average vehicle interior temperature T
From Na v, the average value ENav of the deviation is determined as ENa v = TNav - Tset, and is substituted into the variable ENav. In step S25, the value of internal variable KEN is updated. That is, the value obtained by adding the average deviation value ENav to the internal variable KEN calculated during the previous execution of this step is assigned to the variable KEN as a new value of the internal variable KEN. In step S27, the deviation of each of the four regions is determined. That is, the target temperature Tset and the detected temperature TN(
From i), the deviation EN (i) of each region is determined as EN (i) = TN (i) −Ts e t, and the variable E
Assign each to N(i). In step S29, control data is calculated. That is, the deviation EN (i
) and the internal variable KEN updated in step 325.
From the values of ) respectively. In step S31, a predetermined table 1 stored in the RAM 22 is referred to, and the air conditioner of the area (i) is determined according to the value of the control pig Y (i). 110(i>) The values of air conditioning capacity Q(i) required for
Data that associates the value of the control data Y with the value of the air conditioning capacity Q is prepared. As mentioned above, the control data Y (i) is the proportional term AX
It is given as the sum of EN (i) and the integral term BXKEN (i) (!:. Therefore, as shown in Figure 4 (a), regions (1) to (4)
When the temperature of is -like, the proportional term AXEN (
1) The values of ~AXEN (4) are all equal (S2
(see 7). Further, the value of the integral term BXKEN is always equal in each region (see S25). Therefore, each air conditioner 10 (
Air conditioning capacity required for 1) to 10(4) Q(1) to Q(
4) are all equal. On the other hand, as shown in FIG. 4(b), when the temperatures of regions (1) to (4) are different, the proportional term AXEN of each region
The values of (1) to AXEN (4) are different (S
27). For this reason, each air conditioner 10(1) to 10(
The air conditioning capacities Q(1) to Q(4) required for 4) are different from each other. In step S33, a predetermined table 2 stored in the RAM 22 is referred to, and the control amount of each air conditioner (blow air temperature TC(i), air volume WC(i)
, and evaporator 12(i) and heater core 11(i)
(operating rate) respectively. In the predetermined table 2, as shown in FIG.
The value of the air conditioning capacity Q is calculated by the outlet air temperature TC and the air flow rate WC.
Data that corresponds to is prepared. It is assumed that data for realizing the blowout air temperature TC, that is, data giving the operating rates of the evaporator 12(i) and the hita core 11(i), are also prepared. In step S35, the blown air temperature TC(i), the air flow rate WC(i), and the evaporator 12(i) and heater core 11(i) of each region obtained in step S33 are determined.
According to the data giving the operating rate of , control data given to the drive circuits Lid (i), 12d (i) and 13d (i) of each actuating section is calculated and outputted respectively. Control in the device of this embodiment is performed in the manner described above. Note that steps S13 to S17. As described above, step S37 functions as a delay process that defines the time interval at which the air conditioning control is performed by the present device. In this device, the delay timer value is initially set to a value of about 10 to 20 seconds, for example, in step SLl. In addition, in the above control, the target temperature Tset is the same for each region, but if it is made different, the process in step S23 is set to ENav-TNav-ΣTset(i)/4, and the process in step S27 is The processing of EN (i)=TN (i) −Ts e t (i)
A similar effect can be obtained by doing so. Further, although the present device shows a case in which the air-conditioned space is divided into four sections, the present invention can also be implemented using any number of sections.

【Effect of the invention】

As described above, the present invention performs proportional processing on the deviation between the detected temperature and the target temperature of each divided space, and performs integral processing on the spatial average deviation between the temperature of the air-conditioned space and the target temperature to obtain control data. This device compares the control data with predetermined reference data and controls the operation of each air conditioning means installed in each partitioned space. According to the present invention, control data is given as the sum of a proportional term AXEN (i) that takes an independent value for each partitioned space and an integral term BXKEN that has a common value for all partitioned spaces, and the control data is By comparing with the reference pig, the air conditioning of each compartment is individually controlled. Therefore, even when controlling the temperature of each compartment using air conditioners installed in each compartment,
Temporal and spatial stabilization of the controlled temperature is achieved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the arrangement of each air conditioner in the vehicle interior of the embodiment device, Fig. 2 is a block diagram schematically showing the configuration of the control circuit of the embodiment device, and Fig. 3 is a control CPU 20 of the above device.
4 and 5 are characteristic diagrams explaining the processing in FIG. 3, and FIG. 6 is an explanatory diagram of the concept of air conditioning control based on proportional-integral processing. 1 (i = 1 to 4) Variable 11 (i
)゛ Evaporator 12 (i) Heater core 13 (j) Blow fan 15 I) Separated space temperature sensor Y (]) Control data

Claims (1)

[Scope of Claims] Temperature detection means installed at predetermined locations in each compartment of the air-conditioned space; air conditioning means installed at predetermined locations in each compartment of the air-conditioned space; A target temperature input means for issuing a command, which performs proportional processing on the deviation between the detected temperature of each divided space and the target temperature, and performs integral processing on the spatial average deviation between the temperature of the air-conditioned space and the target temperature, An air conditioning control device comprising: calculation means for obtaining control data; and control means for comparing the calculated control data with predetermined reference data and operating each air conditioning means based on the results.