JPH10119544A - Air conditioning controller for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress heat loss in heat exchange means when hot water is heated and early blow hot air of a desired temperature by limiting flow rate of hot water circulating in the heat exchange means to prescribed quantity and limiting gas quantity of wind delivered by a blower to prescribed quantity when an air conditioner is started. SOLUTION: When an air conditioner is started, a blower 11 is controlled so that gas quantity may be a prescribed value by a blower gas quantity control part 35. At the same time, a pump 15 is controlled so that flow rate of hot water in a circulation route may be the prescribed value by a pump flow rate control part 33. At this stage, each of the prescribed values of gas quantity and flow rate is set to a value by which heat loss due to a heat exchange by a heater core 13 becomes minimum. A hot water heating system 17 controlled by a heater control part 25 and hot water is heated so as to be a temperature target value. When hot water detected by a temperature sensor 31 becomes a prescribed temperature or more, the blower 11 is controlled so that gas quantity may be a gas quantity target value and the pump 15 is controlled so that flow rate of circulating hot water may be a water quantity target value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioning control system for performing air conditioning in a passenger compartment using an electric hot water circulation device.

[0002]

2. Description of the Related Art FIG. 6 shows a block diagram of a conventional automotive air conditioner (hereinafter referred to as "air conditioner") using an electric hot water circulation device. In this figure, the electric hot water circulation device comprises a blower 11, a heat exchanger (hereinafter referred to as a "heater core") 13, a pump 15, and a hot water heating device 17. The heater core 13, the pump 15, and the hot water heating device 17 are connected by a pipe 19 so that hot water circulates in the pipe 19. The blower 11 is provided in the air conditioning duct 21 together with the heater core 13. The hot water in the pipe 19 is heated by the hot water heating device 17,
The air circulated by the pump 15 and exchanged with the hot water circulated in the heater core 13 by the air sent out by the blower 11 generates hot air, which is sent out into the vehicle interior.

[0003] The temperature of the hot air sent into the vehicle compartment is based on the temperature of the hot water circulating in the heater core 13, the flow rate of the hot water, It is adjusted by controlling the air volume of the air sent out. Heater core 13
The flow rate of the hot water circulating in the
5 is controlled. The temperature of the hot water is controlled by the heater control unit 25 controlling the hot water heating device 17. The amount of warm air sent into the vehicle interior is controlled by the blower control unit 27 controlling the blower 11. The heater control unit 25, the pump control unit 23, and the blower control unit 27 are controlled by the air conditioning control device 29.

In such a conventional air-conditioning control device, at the time of startup, final target values based on the set values are set for the temperature of the hot water, the flow rate of the hot water, and the flow rate of the hot air, respectively, and the temperature of the hot water is set. In addition, the flow rate of the hot water and the flow rate of the hot air have been controlled all the time from the final target value. That is, when a target value is initially set based on the set value, the target value does not change, so that the flow rate of hot water and the flow rate of hot air are controlled to be constant throughout.

[0005]

In this case, even when the temperature of the hot water has not risen sufficiently high, the hot water circulates at a predetermined flow rate, which is a final target value, and radiates heat by heat exchange in the heater core. It took time for the temperature of the hot water to rise. For this reason, it took time to raise the temperature in the vehicle interior. In addition, since the air volume of the blower is also controlled at a predetermined value, there is a problem that when the temperature of the hot water does not rise sufficiently high, cool air blows out into the vehicle interior and the occupant feels discomfort. Furthermore, as described above, since it takes time to raise the temperature of the wind blown out of the air conditioner, even when removing the fogging of the vehicle window with hot air, it takes time to remove the fogging, which hinders driving. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to raise the temperature of hot water to a predetermined value in a short time in an automobile air conditioner using an electric hot water circulation device. It is an object of the present invention to provide a control device for an electric hot water circulation device which can perform the control.

[0007]

According to the present invention, there is provided an air conditioning control apparatus for a vehicle, comprising: a blower for sending out air; and a hot water heating means for heating hot water; and a heater for heating the hot water and air sent by the blower. In a control device of an automotive air conditioner including a heat exchange means for performing heat exchange to generate hot air, and a hot water circulation means including a pump means for circulating the hot water to the hot water heating means and the heat exchange means, Water temperature detection means for detecting the temperature of the hot water, heater control means for controlling the hot water heating device to adjust the temperature of the hot water, and blower air volume control means for controlling the blower to adjust the air volume A pump flow rate control means for controlling the pump to adjust the flow rate of the hot water,
Air conditioning control means for controlling the heater control means, the blower air volume control means, and the pump flow rate control means is provided.

At the time of startup, the air conditioning control means controls the heater control means at a predetermined control value corresponding to a set value set by a user, and based on a detection result from the water temperature detection means, When the temperature is lower than a predetermined temperature, the blower air volume control means is controlled so that the flow rate of the hot air is a predetermined flow rate, and the pump flow rate control means is controlled so that the flow rate of the hot water is a predetermined flow rate.
Thereafter, when the temperature of the hot water becomes equal to or higher than a predetermined temperature,
The blower air volume control means is controlled such that the air volume of the hot air is a predetermined target air volume according to the set value, and the pump is controlled so that the flow rate of the hot water becomes a predetermined target flow volume according to the set value. Control the flow control means.

In the above-mentioned air conditioning control apparatus for an automobile, the predetermined air volume is set to zero or a value smaller than the target air volume so that heat loss due to heat exchange in the heat exchange means during heating of the hot water is minimized. The flow rate may be the target flow rate.

[0010] In the above-mentioned air conditioning control apparatus for an automobile, the predetermined air volume is set to the target air volume and the pump is set to the predetermined air flow so that heat loss due to heat exchange in the heat exchange means during heating of the hot water is minimized. The minimum flow rate that does not stop or a value smaller than the target flow rate may be used.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a vehicle air-conditioning control apparatus according to an embodiment of the present invention.
FIG. 1 shows a block diagram of an automotive air conditioner (hereinafter, referred to as “air conditioner”) using an electric hot water circulation device.
In this figure, an electric hot water circulation device includes a hot water heating device 17 for heating hot water, and a pump 15 for circulating hot water.
And a heater core (heat exchanger) 13 for performing heat exchange. The heater core 13, the pump 15, and the hot water heating device 17 are connected by a pipe 19 through which hot water flows, and constitute a hot water circulation path. The heater core 13 is installed in an air conditioning duct 21, and a blower 11 for sending out air is provided in the air conditioning duct 21. Also,
The air conditioner includes a heater controller 25 that controls the hot water heater 17 and a pump flow controller 33 that controls the pump 15.
And a blower air volume control unit 35 for controlling the blower 11 and an air conditioning control device 37 for controlling these control units.
The air-conditioning control device 37 is connected to the operation panel 22 on which the user sets the temperature and the amount of hot air. Further, a temperature sensor 31 for detecting the temperature of the hot water is provided at the hot water inlet of the heater core 13 in the circulation path in the hot water circulation device,
The temperature information of the hot water is input to the air conditioning controller 37. Note that the temperature sensor 31 may be provided in the hot water heating device 17.

As described in the prior art, in the electric hot water circulation device, the hot water heated by the hot water heating device 17 circulates in the pipe 19 and is sent out by the blower 11 at the heater core 13 in the air conditioning duct 21. Exchange heat with air. Thereby, warm air is generated in the air conditioning duct 21 and sent out into the vehicle interior.

At this time, the temperature of the hot air sent into the vehicle compartment is adjusted by controlling the temperature of the hot water, the flow rate of the hot water, and the air volume by the blower. The temperature of the hot water is controlled by the heater control unit 25, the flow rate of the hot water is controlled by the pump flow rate control unit 33, and the air volume sent out by the blower is controlled by the blower air volume control unit 35. The heater control unit 25, the pump flow control unit 33, and the blower air volume control unit 35 are controlled by an air conditioning control device 37.

In the present embodiment, the temperature of the hot water is detected by a temperature sensor 31 provided in the circulation path, and the pump flow control unit 33 and the blower air volume control unit 35 are controlled by the air conditioning control unit 37 based on the detection result. By doing so, the flow rate of the hot water and the flow rate of the wind sent out by the blower 11 are controlled. That is, the air conditioning control device 37 of the present embodiment increases the temperature of the hot water in a short time,
During the period from when the air conditioner is started to when the hot water reaches a predetermined temperature, the flow rate of the hot water and the air volume by the blower 11 are controlled to zero or a predetermined value so that heat loss due to heat exchange in the heater core 13 during heating of the hot water is minimized. I do. Hereinafter, the control will be described in detail.

FIG. 2 is a flowchart showing the first control when the air-conditioning control device 37 is started. In the figure,
When the air conditioner is started, the temperature target value, which is the target value of the temperature of the hot water, and the target value of the flow rate of the hot water are set based on the set values for the temperature and the flow rate of the hot air set on the operation panel 22 by the occupant. A certain flow rate target value and an air volume target value which is a target value of the air volume of the blown wind are set (S1).
Here, each target value is a control value of the temperature and flow rate of hot water and the flow rate of hot air for obtaining the temperature and flow rate of hot air set on the operation panel 22. Next, the blower 11 is controlled by the blower air volume control unit 35 so that the air volume becomes a predetermined value smaller than the air volume target value (S2). At the same time, the pump 15 is controlled by the pump controller 33 so that the flow rate of the hot water flowing through the circulation path becomes a predetermined value smaller than the target flow rate value (S3). Here, the predetermined value of the air volume and the predetermined value of the flow rate are set to zero or a value smaller than the target value so that the heat loss due to heat exchange in the heater core 13 is minimized. Also, the heater control unit 2
5, the hot water heating device 17 is controlled so that the hot water is heated so as to have a temperature target value corresponding to the set value (S4). At this time, the blower air volume control unit 35, the pump flow control unit 33, and the heater control unit 25 are controlled based on a control signal from the air conditioning control device 37.

Based on the value detected by the temperature sensor 31 provided in the circulation path, it is determined whether or not the temperature of the hot water has reached a predetermined temperature (for example, 60 ° C.) (S5).
The flow rate and the air volume of the hot water are controlled at the above-mentioned predetermined values until the predetermined temperature is reached, and the hot water is continuously heated (S2 to S5). When the temperature of the hot water rises and becomes equal to or higher than the predetermined temperature due to the heating of the hot water by the heater core 13, the blower 11 is controlled by the blower air volume control unit 35 so that the air volume becomes the air volume target value (S6). At the same time, the pump 15 is controlled by the pump flow control unit 33 so that the flow rate of the circulating hot water becomes the water flow target value (S7). Thereafter, the air conditioner is operated with these target values.

FIG. 3 is a flow chart showing the second control when the air-conditioning control device 37 is started. In FIG. 3, when the air conditioner is started, a temperature target value which is a target value of the temperature of the hot water, a flow rate target value which is a target value of the flow rate of the hot water, and a target value of the air volume of the blown air are set according to the set values. A certain air flow target value is set (S11). Next, the blower 11 is controlled by the blower air volume control unit 35 so that the air volume becomes zero or a predetermined value smaller than the air volume target value so that heat loss due to heat exchange in the heater core 13 is minimized (S12). . Further, the pump 15 is controlled by the pump flow control unit 33 such that the flow rate of the hot water flowing through the circulation path becomes the flow rate target value (S13). Further, the hot water heating device 17 is controlled by the heater control unit 25, and the hot water is heated so as to reach the temperature target value corresponding to the set value (S
14).

Based on the value detected by the temperature sensor 31 provided in the circulation path, it is determined whether or not the temperature of the hot water has reached a predetermined temperature (S15). It is controlled to be zero or a predetermined value smaller than the air flow target value, the flow rate is controlled at the flow rate target value, and the hot water continues to be heated (S12 to S12).
15). If the temperature of the hot water becomes equal to or higher than the predetermined temperature, the blower 11 is controlled by the blower air volume control unit 35 so that the air volume becomes the air volume target value (S16). Thereafter, the air conditioner is operated with these target values.

FIG. 4 is a flowchart showing the third control when the air-conditioning control device 37 is started. In FIG. 4, when the air conditioner is activated, the temperature target value which is the control target value of the temperature of the hot water, the flow rate target value which is the control target value of the flow rate of the hot water, and the control of the air volume of the blown air are set according to the set values. An air flow target value as a target value is set (S2
1). Next, the blower 11 is controlled by the blower air volume control unit 35 so that the air volume becomes the air volume target value (S22).
At the same time, the pump 15 is controlled by the pump flow control unit 33 so that the flow rate of the hot water flowing through the circulation path becomes the minimum flow rate at which the pump does not stop (S23). Further, the hot water heating device 17 is controlled by the heater control unit 25, and the hot water is heated so as to reach the target temperature value corresponding to the set value (S2).
4).

Based on the value detected by the temperature sensor 31 provided in the circulation path, it is determined whether or not the temperature of the hot water has reached a predetermined temperature (S25). Then, the flow rate and flow rate of the hot water are controlled such that the flow rate of the blower 11 becomes the target flow rate value, and the hot water is continuously heated (S22 to S25). When the temperature of the hot water becomes equal to or higher than the predetermined temperature, the pump 15 is controlled by the pump flow control unit 33 so that the flow rate of the circulating hot water becomes the flow rate target value (S26). Thereafter, the air conditioner is operated with these target values.

FIG. 5 shows the temperature change with time of the hot water circulating in the electric hot water circulating apparatus when controlled by the above control method. As shown in FIG. 5, according to the air conditioner of the present embodiment, it can be seen that the target temperature is reached more quickly than in the conventional case.

As described above, in the control device of the air conditioner using the electric hot water circulating device of the present embodiment, the temperature of the hot water circulating in the electric hot water circulating device after the air conditioner is started is determined by the predetermined value. Until the temperature is reached, by controlling the flow rate of the hot water and the flow rate of the wind from the blower 11 to a predetermined value smaller than the target value, the heat loss in the heater core 13 during the heating of the hot water can be minimized, so that it can be efficiently performed in a short time. The temperature of the hot water can be increased, and the temperature of the air blown into the vehicle compartment from the air conditioner can be increased in a short time.

[0023]

According to the air-conditioning control device for a vehicle according to the present invention, at the time of startup, the flow rate of the hot water circulating through the heat exchange means is limited to a predetermined amount, and the amount of air blown by the blower is reduced by a predetermined amount. By limiting to, heat loss in the heat exchange means at the time of hot water heating is minimized,
The time for raising the hot water to the desired temperature is reduced. Thereby, the hot air of a desired temperature can be blown out more quickly, and when the fogging of the window is removed by the hot air, it can be removed in a short time.

Further, in the air conditioning control device for a vehicle, the blower may be stopped or the amount of the blower may be reduced until the temperature of the hot water becomes equal to or higher than a predetermined temperature, so that the heat loss in the heat exchange means is reduced. It is suppressed and the time for raising the hot water to the desired temperature is reduced. For this reason, the warm air of a desired temperature can be blown out more quickly. Further, since the air blowing is stopped until the temperature of the hot water reaches the predetermined temperature, a low-temperature air is not blown out, so that the occupant does not feel uncomfortable.

Further, in the air conditioning controller for a vehicle, the flow rate of the hot water by the pump means may be limited to a predetermined amount until the temperature of the hot water becomes equal to or higher than the predetermined temperature, thereby suppressing the heat loss in the heat exchange means. As a result, the time for raising the hot water to the desired temperature is reduced. For this reason, the warm air of a desired temperature can be blown out earlier, and the temperature in the vehicle interior rises more quickly.

[Brief description of the drawings]

FIG. 1 is a block diagram of a vehicle air conditioning control device according to the present invention.

FIG. 2 is a flowchart showing a first control for a hot water circulation device and a blower.

FIG. 3 is a flowchart showing a second control for the hot water circulation device and the blower.

FIG. 4 is a flowchart showing a third control for the hot water circulation device and the blower.

FIG. 5 is a diagram showing a time change of the temperature of hot water circulating in the electric hot water circulation device.

FIG. 6 is a block diagram of a conventional automotive air conditioning control device.

[Explanation of symbols]

11 ... blower, 13 ... heat exchanger (heater core), 15 ...
Pump 17 hot water heating device 19 pipe 21 air conditioning duct 22 operation panel 23 pump control unit
25: heater control unit, 27: blower control unit, 29: conventional air conditioning control unit, 31: temperature sensor, 33: pump flow rate control unit, 35: blower air volume control unit, 37: air conditioning control device according to the present invention.

Claims (3)

[Claims] A blower for sending out air, a hot water heating means for heating hot water, a heat exchange means for exchanging heat between the hot water and the air sent out by the blower to generate hot air, A control device for an air conditioner for a vehicle, comprising a hot water circulating unit including a hot water heating unit and a pump unit that circulates the hot water to the heat exchange unit, a water temperature detecting unit that detects a temperature of the hot water, Heater control means for controlling the hot water heating device to adjust the temperature; blower air volume control means for controlling the blower to adjust the air volume; and controlling the pump to adjust the flow rate of the hot water. Pump flow control means, at the time of startup, controlling the heater control means with a predetermined control value corresponding to a set value set by a user; When the temperature of the hot water is lower than a predetermined temperature based on the detection result from the outlet means, the blower air volume control means is controlled so that the air volume of the hot air becomes a predetermined air volume, so that the flow rate of the hot water becomes a predetermined flow volume. And controlling the blower air volume control means such that when the temperature of the hot water becomes equal to or higher than a predetermined temperature, the air volume of the hot air becomes a predetermined target air volume according to the set value. An air-conditioning control device for an automobile, further comprising an air-conditioning control means for controlling the pump flow control means so that the flow rate of the hot water becomes a predetermined target flow rate according to the set value. 2. The vehicle air-conditioning control device according to claim 1, wherein the predetermined airflow is zero or a value smaller than the target airflow, and the predetermined flow is the target flow. Air conditioning control device. 3. The air conditioning controller for a vehicle according to claim 1, wherein the predetermined air flow is the target air flow, and the predetermined flow is a minimum flow at which the pump does not stop or a value smaller than the target flow. An air conditioning control device for a vehicle, characterized by the following.