JPH11139146A - Hot water type heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set desired blowoff temperature distribution by a reheat type unidirectional heater core by regulating the temperature of hot water fed to a heating heat exchanger, to the mixing ratio of high temperature hot water from a hot water source and low temperature hot water after passing through the heating heat exchanger, and setting the quantity of hot water. SOLUTION: In the case of any mode other than a face mode, the lower target blowoff temperature is compared with the detection value of a second blowoff temperature sensor 29 to control the valve opening of a control valve 7. The temperature of air-conditioning air blasted into a foot air passage 20 is controlled, that is, the mixing ratio of high temperature hot water from an engine 2 and low temperature hot water after passing through a heater core 17 is regulated according to the valve opening of the contorl valve 7, and high temperature hot water to the heater core 17 is automatically regulated. The upper target blowoff temperature is then compared with the detection value of a first blowoff temperature sensor 28, and the hot water quantity supplied to the heater core 17 is controlled by the rotating speed of a motor- driven pump 11 to control the temperature of air-conditioning air to a face air passage 19. Desired blowoff temperature distribution can therefore be regulated and set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water type heating apparatus, and more particularly to a hot water type heating apparatus in which hot water linearly flows in a plurality of tubes of a heating heat exchanger (heater core) in the same direction.

[0002]

2. Description of the Related Art Conventionally, a flat tube and a corrugated fin are laminated and arranged as a heater core of a hot water type heating device to form a core portion for exchanging heat with air, and hot water (engine cooling water) is provided at one end of the core portion. There is a well-known one-way type in which an inlet tank for distributing to a flat tube is arranged, and an outlet tank for joining hot water flowing through the flat tube is arranged on the other end side of the core portion.

[0003] Here, the one-way heater core refers to a structure in which hot water flows in all flat tubes from the inlet tank side to the outlet tank side only in the same direction. Conventionally, there is an advantage that the water flow resistance can be reduced as compared with a U-turn type in which hot water flows in a U-turn through a known core portion.
Also, when a minute flow of hot water flows through such a one-way heater core, the temperature of the hot water flowing in the flat tube is high at the inlet tank side, but the hot water at the outlet tank side is already air and heat at the inlet tank side. Because it is replaced and the temperature drops,
It is known that the temperature becomes lower than that of the inlet tank side and a remarkable temperature distribution occurs.

[0004]

By the way, in a vehicle air conditioner to which the above-mentioned hot water type heating device is applied, the mixing ratio of cold air and hot air is adjusted by an air mixing door.
There are known an air mixing system for obtaining a desired air-conditioning air temperature and a reheating system for adjusting a degree of air heating by a heater core without providing an air mixing door.

The inventor of the present invention has studied the use of the above-described one-way heater core in a reheating type heating apparatus. However, in the one-way heater core, the above-described temperature distribution occurs, and thus the same applies to air-conditioned air.吹 吹 吹 吹 吹. For this reason, when the blowing mode is the bi-level mode, for example, depending on the occupant, the temperature of the conditioned air blown toward the upper body of the occupant is equal to the temperature of the conditioned wind blown toward the lower body of the occupant ( There is a demand for the same temperature bi-level mode), but it is difficult to achieve this with the one-way heater core.

Therefore, a first object of the present invention is to provide a hot water type heating apparatus in which a temperature control method is a reheat type and a one-way heater core is applied, without being affected by a blow-out temperature distribution due to a flow direction of hot water in the one-way heater core. Another object of the present invention is to make it possible to set a desired outlet temperature distribution. A second object of the present invention is to provide a hot water type heating apparatus in which the temperature adjustment method is a reheat type, a one-way heater core is applied, and the same temperature bi-level mode can be achieved.

[0007]

In order to achieve the above object, the invention according to claim 1 has a heating heat exchanger (17) to which hot water is supplied from a hot water source (2). The core (1) of the heating heat exchanger (17) that exchanges heat with air.
7e) is a hot water type heating device configured so that the hot water flows only in one direction from one end to the other end. In the hot water heating device, the hot water supply to the heating heat exchanger (17) is performed by using a hot water source. Mixing ratio adjusting means (7) for adjusting the mixing ratio between the high-temperature hot water supplied from (2) and the low-temperature hot water after passing through the heating heat exchanger (17); and a heating heat exchanger (17). ) Is provided with hot water amount setting means (11, 13) for setting the amount of hot water to be supplied to the water supply device.

In other words, the present inventor applies the above-mentioned heating heat exchanger to a hot water type heating device for adjusting the temperature of the supplied hot water, and further uses the hot water amount setting means (11, 13) to set the heating heat exchanger. By setting the amount of hot water supplied to the exchanger (17), it was thought that the outlet temperature distribution of the heating heat exchanger could be set to a desired value. The reason will be described with reference to FIG. In the lower part of FIG. 1, the hot water temperature on the hot water inlet side of the heating heat exchanger is adjusted by the mixing ratio adjusting means (7) as indicated by an arrow B in FIG. It is adjusted by the mixing ratio of the hot water and the low-temperature hot water after passing through the heating heat exchanger (17) as shown by an arrow A in FIG.

At this time, the temperature of the hot water outlet side of the heating heat exchanger is lower than that of the hot water inlet side as described above.
However, the decrease in the hot water temperature differs depending on the amount of hot water. That is, the temperature of the hot water at the outlet of the hot water is determined by the amount of heat exchange between the air and the hot water at the inlet of the hot water of the heating heat exchanger (17). Is determined. Therefore, by setting the amount of hot water, a desired outlet temperature distribution can be set in advance for each hot water heating device without being affected by the outlet temperature distribution due to the flow of hot water in the heating heat exchanger.

According to the second aspect of the present invention, the amount of hot water supplied to the heating heat exchanger (17) is adjusted in accordance with the air conditioning information signal by utilizing the concept of the first aspect of the present invention. And a hot water amount adjusting means (11, 13). Thereby, it is possible to adjust the outlet temperature distribution of the heating heat exchanger according to the air conditioning information.

Further, according to the invention described in claim 5, according to claim 1,
A vehicle air conditioner to which the hot water heating device according to claim 3 is applied, wherein the conditioned air that has passed through the hot water inlet side of the core portion (17e) is blown to a lower portion in the vehicle compartment,
A blowing mode in which the conditioned air passing through the hot water outlet side of the core portion (17e) is blown from an upper part in the vehicle compartment can be set, and in the blowing mode, the hot water amount setting means (11,
13) setting a first temperature of the conditioned air blown from the upper part, and setting a second temperature of the conditioned air blown from the lower part by the mixing ratio adjusting means (7). .

[0012] Thus, the first temperature of the conditioned air blown from the upper portion in the vehicle compartment and the second temperature of the conditioned air blown from the lower portion in the vehicle compartment are determined by the distribution of the blow-out temperature of the heating heat exchanger. Can be set to a desired value. According to a sixth aspect of the present invention, there is provided a vehicle air conditioner to which the hot water type heating device according to the second or fourth aspect is applied, wherein the conditioned air passing through the hot water inlet side of the core portion (17e) is provided. A blowing mode in which air is blown to the lower part in the vehicle compartment and air-conditioned air that has passed through the hot water outlet side of the core portion (17e) is blown from the upper part in the vehicle cabin can be set. The first temperature of the conditioned air blown from the upper part is adjusted by the hot water amount adjusting means (11, 13), and the second temperature of the conditioned air blown from the lower part is adjusted by the mixing ratio adjusting means (7). It is characterized by adjustment.

Thus, the first temperature of the conditioned air blown from the upper portion in the vehicle compartment and the second temperature of the conditioned air blown from the lower portion in the vehicle compartment are changed according to the air conditioning information. The outlet temperature distribution of the exchanger can be adjusted to a desired value. Also,
In the invention described in claim 8, the first set temperature (TSET (upper)), which is an air conditioning information signal in the upper portion by the occupant,
Setting means (32) for setting a second set temperature (TSE) which is air-conditioning environment information in the lower part by the occupant.
T (lower)) and second setting means (33) for setting
The first calculating means (step S521) includes at least the first
The first target temperature (TAO (upper)) is calculated based on the set temperature (TSET (upper)), and the second calculating means (step S521) calculates at least the second target temperature (TSET (upper)).
The second target temperature (TAO (lower)) is calculated based on (lower)).

Thus, the temperature of the upper portion of the vehicle interior can be controlled to the first set temperature, and the temperature of the lower portion of the vehicle interior can be controlled to the second set temperature, so that the upper and lower independent temperatures can be controlled. According to the ninth aspect, the blowing mode includes:
This is a bi-level mode in which conditioned air is blown from the upper portion to the upper body of the occupant and from the lower portion to the lower body of the occupant, and the first temperature and the second temperature are substantially the same.

By the way, as described above, depending on the structure of the heating heat exchanger, the first temperature is usually lower than the second temperature. The first temperature and the second temperature can be made substantially the same without being affected. According to the tenth aspect of the present invention, the blowing mode is a bi-level mode in which conditioned air is blown from the upper portion to the upper body of the occupant and from the lower portion to the lower body of the occupant. When a certain amount of solar radiation (Ts) increases, the amount of hot water is reduced to lower the temperature of the conditioned air blown toward the upper body of the occupant.

As a result, when the amount of solar radiation increases, the temperature of the conditioned air blown toward the upper body of the occupant decreases.
The occupants can cancel the hot flash feeling by the solar radiation, and the air conditioning feeling can be improved. Furthermore, by doing so, it is necessary to provide a bypass passage that bypasses the heating heat exchanger as in the past, and when the amount of solar radiation increases, it is necessary to open the bypass passage to cancel the amount of heat corresponding to the amount of solar radiation. And the amount of heat corresponding to the amount of solar radiation can be canceled without providing a bypass passage. As a result, the physique of the vehicle air conditioner can be reduced, and vehicle mountability can be improved.

[0017]

Embodiments of the present invention will be described below. In the present embodiment, the hot water heating device of the present invention is applied to an air conditioner for a vehicle. FIG. 1 shows an outline of a vehicle air conditioner 1 and an overall configuration diagram of a hot water circuit 100. First, the hot water circuit 100 will be described. The hot water circuit 100 has an engine 2 that is a hot water source. Although not shown, the hot water circuit 100 on the left side of the engine 2 in FIG.
Is connected to a cooling water circuit having a well-known radiator for cooling engine cooling water (hereinafter, hot water). A mechanical pump 4 is built in the engine 2. When the engine 2 is driven, the pump 4 supplies hot water to a hot water circuit 1.
00 is set to flow.

The hot water circuit 100 constitutes a hot water circulation circuit for circulating hot water from the engine 2 to a heater core 17 described later. The hot water circuit 100 is a simple closed circuit as shown in FIG. In the hot water circuit 100, the low-temperature hot water that is provided in parallel with the heater core 17 and that passes through the heater core 17 and exchanges heat with air returns to the heater core 17 by bypassing the engine 2 and returning to the heater core 17 again. Road 5 is provided.

In the hot water circuit 100, a hot water supply path 100a for supplying hot water from the engine 2 to the heater core 17 has a control for adjusting the amount of hot water supplied to the heater core 17 and the amount of hot water flowing through the reflux hot water path 5. A three-way type regulating valve 7 is provided. Specifically, the regulating valve 7 is provided at a junction of the hot water supply path 100a and the reflux hot water path 5 as shown in FIG.

Here, the regulating valve 7 will be described.
The adjusting valve 7 is a rotary valve in which a resin valve body 7b is housed in a resin-made bottomed cylindrical housing 7a as shown in FIG. As shown in FIG. 1, a control channel 7c through which hot water flows is formed in the valve element 7b. In addition,
In FIG. 1, the valve element 7b is hatched for easy understanding of its shape and the control flow path 7c.

In this embodiment, when the valve element 7b rotates in the direction of arrow X in FIG. 1, the control flow path 7c and the housing 7a
And is connected to the hot water supply path 100a and the engine 2
The overlapping area with the hot water inlet 8, which is the inlet of the hot water flowing through, changes. Further, when the valve element 7b rotates, the overlapping area of the control flow path 7c and the hot water intake 9 for the reflux hot water path 5 that opens to the housing 7a changes, and the control flow path 7c and the housing 7a And the overlapping area of the hot water outlet 10 communicating with the hot water inflow circuit 100b on the heater core 17 side changes.

For example, in order to maximize the heating capacity of the heater core 5, the valve 7b is rotated counterclockwise in FIG. 1 to close the hot water intake 9 and close the reflux hot water channel 5. At the same time, the hot water inlet 8 and the hot water outlet 10 are fully opened. On the other hand, in order to minimize the heating capacity of the heater core 5 (maximum cooling), the valve body 7b in FIG. 1 is rotated clockwise to close the hot water inlet 8 and the hot water outlet 10, The hot water inlet 9 is opened. The state of the regulating valve 7 shown in FIG. 1 indicates a state in which the valve opening is in an intermediate range between the maximum heating and the maximum cooling.

The regulating valve 7 has a pair of stoppers (not shown) formed, for example, on the housing 7a in order to regulate the operating range of the regulating valve 7 from the preset maximum heating to the maximum cooling. The valve body 7b (one end in the direction of the rotation axis) is formed with a receiving portion that comes into contact with the stopper portion. Thus, when the operating position of the valve element 7b reaches the maximum heating, the regulating valve 7 collides with one of the stopper portions and the receiving portion.
b does not operate. On the other hand, when the operating position of the valve element 7b reaches the maximum cooling, the regulating valve 7 collides with the other stopper part and the receiving part.
b does not operate.

The hot water inflow circuit 100b is provided with an electric pump 11 which constitutes the hot water amount adjusting means of the present invention. The electric pump 11 has a heater core 1
It is for generating a hot water flow toward 7. More specifically, as shown in FIG.
9. When all the hot water outlets 10 are open,
By operating the electric pump 11, a hot water flow indicated by an arrow A in FIG. 1 is generated in the heater core 17 and the return hot water channel 5.

The electric pump 11 is operated by receiving electric power from a battery 12 (rated 12 V) mounted on the vehicle. Between the battery 12 and the electric pump 11, there is provided a variable resistor 13, which constitutes the above-described hot water amount adjusting means and is a means for changing the number of revolutions of the electric pump 11, and whose resistance value changes. Next, the vehicle air conditioner 1 will be described. FIG. 2 shows an overall configuration diagram of the vehicle air conditioner 1.

The vehicle air conditioner 1 has an air conditioner case 14 which forms an air passage into the vehicle interior. In the air conditioning case 14,
An electric blower 15 (hereinafter, blower) that generates an airflow toward the vehicle interior is provided. In the air conditioning case 14,
An evaporator 16 of a refrigeration cycle (not shown) mounted on the vehicle is disposed downstream of the blower 15. The low temperature and low pressure refrigerant flows inside the evaporator 16,
The cooling heat exchanger that cools the air is configured by removing heat from the passing air by the latent heat of evaporation of the refrigerant.

Further, in the air conditioning case 14, the heater core 17, which is a heating heat exchanger for heating the passing air, is housed and arranged downstream of the evaporator 16 so as to block the entire internal flow path. ing. Heater core 5
Is provided in the hot water circuit 6 so that hot water flowing through the hot water circuit 6 circulates. Thereby, in the heater core 5, the passing air and the hot water exchange heat, so that the air is heated. The configuration of the heater core 17 is as follows. FIG. 3 shows the heater core 17.
The single figure of is shown.

The heater core 17 of this embodiment is a one-way heater core described in the above-mentioned prior art, and has a core portion 17e that exchanges heat with air. The core portion 17 is configured by laminating a plurality of flat tubes 17f and a plurality of corrugated fins 17g. The flat tube 17f and the corrugated fin 17g are formed of aluminum or the like. An inlet tank 17b for distributing warm water to all the flat tubes 17f is provided at one end of the core 17 (right side in FIG. 3) and on the inlet side of the flat tubes 17f.

The other end of the core 17 (left side in FIG. 3)
Then, the hot water flowing out of all the flat tubes 17f is joined to the inlet side of the flat tubes 17f to form a hot water circuit 10.
An outlet tank portion 17a that flows to zero is provided. With such a configuration, the hot water flows through the core portion 17e only in one direction from the inlet tank portion 17b at one end to the outlet tank 17a at the other end.

In the air-conditioning case 14, the conditioned air is blown toward the inner surface of the vehicle window glass (not shown) (upper part in the vehicle interior) as shown in FIGS. 1 and 2 downstream of the heater core 5. A defroster air passage 18, a face air passage 19 that blows conditioned air toward the upper body of the occupant (upper part in the passenger compartment), and a foot that blows conditioned air toward the lower body of the occupant (lower part in the passenger compartment) Air passage 20
Are formed. The air passage 18 for the defroster and the air passage 19 for the face constitute the upper outlet passage of the present invention, and the foot air passage 20 constitutes the lower outlet passage.

In this embodiment, the inlets of the defroster air passage 18 and the face air passage 19 are shown in FIG.
As shown in the figure, the core portion 17e is open from the hot water outlet side (outlet tank portion 17a side). The inlet of the foot air passage 20 is open from the hot water inlet side (the inlet tank 17b side) of the core 17e as shown in FIG.

The defroster air passage 18 is opened and closed by a first blow-out mode switching door 21 as an opening / closing member as shown in FIG. 2, and the face air passage 19 is an opening / closing member as shown in FIG. It is opened and closed by the two-blowout mode switching door 22. Further, the foot air passage 20 is opened and closed by a second blowing mode switching door 23 which is an opening and closing member. Thus, in the present example, the well-known face mode, bi-level mode, foot mode, foot differential mode, and defroster mode can be switched and set as the blowing mode. Hereinafter, these blowing modes will be briefly described.

Face Mode In the face mode, the first blow mode switching door 21 closes the defroster air passage 18 and the second blow mode switching door 22 opens the face air passage 19. Further, the foot air passage 20 is closed by the third blowing mode switching door 23. Thus, the conditioned air is sent only to the face air passage 19.

In the bi-level mode, in the bi-level mode, the first blow mode switching door 21 closes the defroster air passage 18 and the second
The face mode air passage 19 is opened by the blow mode switching door 22. The third air outlet mode switching door 23 opens the foot air passage 20. As a result, the air conditioning wind
The air is sent to both the face air passage 19 and the foot air passage 20.

In the bi-level mode, the air passage 19 for the face and the air passage 2 for the foot
0 is open, the conditioned air that has passed through the hot water outlet side of the core portion 17e is sent to the face air passage 19, and the conditioned air that has passed through the hot water inlet side of the core portion 17e becomes air for the foot. The air is sent to the passage 20. Foot Mode In the foot mode, the defroster air passage 18 is slightly opened by the first blowing mode switching door 21 and the second
The blow-out mode switching door 22 closes the face air passage 19. The third air outlet mode switching door 23 opens the foot air passage 20. Thereby, most of the conditioned air is blown to the foot air passage 20, and a small amount of the remaining air is blown to the defroster air passage 18. In addition,
The air flow rate of the conditioned air between the defroster air passage 18 and the foot air passage 20 is about 2 to 8.

Also in this foot mode, the air passage 18 for the defroster and the air passage 20 for the foot are opened at the above-mentioned positions, so that the conditioned air passing through the hot water outlet side of the core portion 17e is supplied to the air passage for the defroster. 18 and the conditioned air that has passed through the hot water inlet side of the core 17 e is sent to the foot air passage 20. Foot differential mode In the foot differential mode, the first blow mode switching door 21 opens the defroster air passage 18 and the second
The blow-out mode switching door 22 closes the face air passage 19. The third air outlet mode switching door 23 opens the foot air passage 20. As a result, about half of the conditioned air is sent to the foot air passage 20 and the other half is sent to the defroster air passage 18. Core part 1
The flow of the conditioned air passing through 7e is the same as that in the foot mode.

Defroster Mode In the defroster mode, the first blowout mode switching door 21 opens the defroster air passage 18 and the second
The blow-out mode switching door 22 closes the face air passage 19. Further, the foot air passage 20 is closed by the third blowing mode switching door 23. As a result, the air conditioning wind
Air is blown only to the defroster air passage 18. The defroster mode is set only when a defroster switch (not shown) provided on the air-conditioning operation panel 31 described later is turned on.

Next, a control system of the vehicle air conditioner 1 will be described. The vehicle air conditioner 1 includes a control device 24 shown in FIG.
Is controlled by the air conditioning. Control device 24
Is a well-known computer means, such as a ROM in which an air conditioning program is stored, and an RA in which data is temporarily stored.
It has an M, A / D converter, a timer, and the like. A schematic diagram of the control device 24 is shown in FIG.

The control device 24 is a means for detecting air conditioning information as an input terminal, and is connected to various sensors constituting an air conditioning information signal generating means of the present invention. Specifically, the control device 24 includes an inside air temperature sensor 25 for detecting the temperature in the passenger compartment,
An outside air temperature sensor 26 for detecting the temperature outside the vehicle compartment, a solar radiation sensor 27 for detecting the amount of solar radiation entering the vehicle interior, and an air-conditioning air blower which is installed downstream of the heater core 5 and whose temperature is adjusted by the heater core 5. Blow-out temperature sensor 2 for detecting temperature
8, 29, a water temperature sensor 30 for detecting the temperature of the hot water discharged from the engine 2 and the air-conditioning operation panel 31 arranged in the vehicle interior are connected.

In this embodiment, the two outlet temperature sensors 2
As shown in FIG. 2, the outlet temperature sensor 28 is disposed on the hot water outlet side of the core 17e, and detects the outlet temperature of the conditioned air passing through the hot water outlet side. On the other hand, as shown in FIG.
7e is disposed on the hot water inlet side, and detects the blow-out temperature of the conditioned air passing through the hot water inlet side.

The air-conditioning operation panel 31 has first and second temperature setting devices 32 and 33 for setting two set temperatures in the passenger compartment.
Is provided. The first and second temperature setting devices 3
2, 33 also constitute signal generation means for deriving the air conditioning information signal of the present invention. The first temperature setter 32 is for setting a first set temperature of an upper portion in the vehicle compartment, and the second temperature setter 33 is for setting a second set temperature of a lower portion in the vehicle compartment. belongs to.

On the other hand, the control device 24 outputs
Servo motor 34, which is an electric driving means for driving the valve element 7b of the regulating valve 7, the variable resistor 13, a driving circuit 35 for driving the blower 15, the outlet switching door 21
To 23 are connected. Next, the control contents of the control device 24 will be described with reference to FIGS.
This will be described with reference to the flowchart of FIG.

First, in FIG. 5, in step S100, the various sensors 25 to 3 are read as air conditioning information is read.
0 is read, and the first and second set temperatures (TSET (upper), TSET) of the first and second temperature setters 32 are read.
(Bottom)). Subsequently, in step S200,
Based on the air-conditioning information read in step S100, a target outlet temperature TAO, which is a target temperature of the conditioned air, is calculated from the following equation (1).

[0044]

## EQU1 ## TAO = KSET × TSET−Kr × Tr−Kam ×
Tam−Ks × Ts + C Here, Tr is a detection value of the inside air temperature sensor 25, Tam is a detection value of the outside air temperature sensor 26, and Ts is a detection value of the solar radiation sensor 27. KSET, Kr, Kam and Ks are gains, respectively, and C is a correction constant. In addition, TSET is the above T
Average temperature of SET (top) and TSET (bottom).

Next, in step S300, the blowing mode is determined based on the target blowing temperature TAO calculated in step S200. Specifically, the blowing mode is set from the map of FIG. 6 stored in the ROM. Subsequently, in step S400, the above step S2
In accordance with the target blowing temperature TAO calculated in 00, the amount of conditioned air blown by the blower 15, that is, the voltage applied to the blower 15 is determined. Note that the setting of the blowing amount is determined from two maps (not shown). That is, of the two maps, one is for warm-up control performed when the water temperature detected by the water temperature sensor 30 is lower than a predetermined temperature, and the other is for warm-up control when the water temperature is higher than the predetermined temperature. This is for normal control. The following description has been made on the case where the water temperature is higher than a predetermined temperature.

Subsequently, in step S500, the blow-out temperature of the conditioned air is controlled in accordance with the blow-out mode determined in step S300. Hereinafter, this will be described with reference to FIGS. In FIG. 7, step S510
Then, it is determined whether or not the blowing mode set in step S300 is the face mode. If the result of this determination is YES and the face mode is set, then step S
At 530, normal temperature control is performed. The contents of step S530 will be described with reference to FIG.

First, in the case of the face mode, the upper target blowing temperature TAO (upper) is calculated in step S531. This TAO (upper) is calculated by the following equation (2).

[0048]

## EQU2 ## TAO (upper) = KSET × TSET (upper) −Kr ×
Tr−Kam × Tam−Ks × Ts + C That is, in the above equation (1), the term of TSET is the average temperature of TSET (upper) and TSET (lower).
TSET (above) instead of T.

Next, in step S532, the TAO
(Upper) and the detection value of the first outlet temperature sensor 28 (hereinafter referred to as the first
Temperature) to control the valve opening of the regulating valve 7. Specifically, when the TAO (upper) is lower than the first temperature, the valve element 7b of the regulating valve 7 is rotated clockwise in FIG. 1 by a predetermined amount. Thereby, for example, as shown in FIG. 10, the hot water inlet 8 and the hot water outlet 10 are closed, and the hot water inlet 9 is closed.
Will be fully opened. As a result, the supply of hot water to the heater core 17 is stopped.

On the other hand, when the TAO (upper) is higher than the first temperature, the valve element 7b of the regulating valve 7 is rotated by a predetermined amount counterclockwise in FIG. Thereby, although not shown in the present example, the hot water inlet 8 and the hot water outlet 10 are slightly opened, and the hot water inlet 9 is still closed. As a result, a small amount of hot water is supplied to the heater core 17, so that the first temperature increases and approaches the TAO (upper).

The actuation amount of the valve element 7b is determined by the TA
The larger the difference between O (upper) and the first temperature, the larger the setting. For example, in a case where the vehicle interior is rapidly cooled in summer, for example, the TAO (above) is much lower than the first temperature. Therefore, in this case, the valve element 7b is in the maximum cooling state. When the interior of the vehicle is sufficiently cooled and the TAO (upper) becomes higher, the valve 7b rotates clockwise in FIG. 1 and a small amount of hot water is supplied to the heater core 17, whereby air conditioning is performed. The temperature of the wind is adjusted and controlled.

Next, in step S533, the electric pump 1
1 is set to the stop state. That is, as can be seen from the above description, in the face mode, the electric pump 11 may be stopped because the hot water inlet 9 is closed, and the adjustment valve 7 adjusts the amount of hot water to the heater core 17. Performs hot water volume adjustment function. Returning to the flowchart of FIG. 7, when the determination result in step S510 is NO and the mode is other than the face mode, that is, when the blowing mode is the bi-level mode, the foot mode, and the foot differential mode, the upper and lower independent temperature is determined in step S520. Perform control. FIG. 9 shows the control contents of the upper and lower independent temperature control.

First, a case in which the blowing mode is the bi-level mode will be described as a typical example. Step S52
1, the upper target blowing temperature TAO is calculated based on the following equation (3).
In addition to calculating (upper), the lower target blowing temperature TAO (lower) is calculated based on Equation 4 below. This step S521 constitutes the first and second calculation means of the present invention.

[0054]

## EQU3 ## TAO (upper) = f (Ts) × (KSET × TSET)
(Bottom) -Kr x Tr-Kam x Tam-Ks x Ts + C)

[0055]

## EQU4 ## TAO (bottom) = KSET × TSET (top) −Kr ×
Tr−Kam × Tam−Ks × Ts + C The above f (Ts) is smaller than 0 and is a value preset based on Ts. F (Ts) is set to decrease as the amount of solar radiation Ts increases.

The above TAO (upper) is the first target temperature of the conditioned air for making the upper space in the vehicle interior TSET (upper), and the above TAO (lower) is the lower target space in the vehicle interior. T
This is the second target temperature of the conditioned air for setting to SET (down). Subsequently, in step S522, the above TAO (lower)
Is compared with the second temperature which is the detection value of the second blowout temperature sensor 29, and the valve opening of the regulating valve 7 is controlled. Thereby, first, the second temperature, which is the temperature of the conditioned air sent to the foot air passage 20, is controlled.

More specifically, since the bi-level mode is a mode mainly used in the middle period such as spring or autumn, the air heating capacity required by the heater core 17 is small. Therefore, in the bilevel mode, the valve opening of the regulating valve 7 in step S522 is as shown in FIG. That is, the hot water inlets 8, 9 and the hot water outlet 10 are all slightly opened. In this case, when the electric pump 11 is operated, the low-temperature hot water flowing through the reflux hot water channel 5 flows into the heater core 17 again as shown by an arrow A in FIGS. The high-temperature hot water from the hot water circuit 100 flows as indicated by an arrow B. That is, according to the valve opening of the regulating valve 7,
High-temperature hot water supplied from the engine 2 and the heater core 17
Is adjusted, and the temperature of the hot water supplied to the heater core 17 is automatically adjusted.

For example, when the above TAO (lower) is higher than the second temperature, the valve element 7b of the regulating valve 7 is rotated a predetermined amount counterclockwise in FIG. Thereby, as shown in FIG. 11, for example, the opening areas of the hot water inlet 8 and the hot water outlet 10 increase, and the opening area of the hot water inlet 9 decreases. That is, of the hot water supplied to the heater core 17, the ratio of the high-temperature hot water from the hot water circuit 100 increases, and the ratio of the low-temperature hot water from the reflux hot water channel 5 decreases.
For this reason, the temperature of the hot water supplied to the heater core 17 increases.

On the other hand, when the above TAO (lower) is lower than the second temperature, the valve element 7b of the regulating valve 7 is rotated by a predetermined amount clockwise in FIG. Thus, for example, the opening areas of the hot water inlet 8 and the hot water outlet 10 are reduced, and the opening area of the hot water inlet 9 is increased. That is, of the hot water supplied to the heater core 17, the ratio of the high-temperature hot water from the hot water circuit 100 decreases, and the ratio of the low-temperature hot water from the reflux hot water channel 5 increases. For this reason, the temperature of the hot water supplied to the heater core 17 decreases. As a result, the second temperature decreases and approaches the TAO (lower).

The temperature of the hot water is adjusted in this manner, and as shown in FIG.
However, the temperature Tw supplied to the heater core 17 by the regulating valve 7 is controlled to 30 to 80 degrees. In addition,
The operation amount of the valve element 7b is set to be larger as the difference between the TAO (upper) and the second temperature becomes larger. Then, in the next step S523, the upper target outlet temperature TAO
The lower value is compared with the first temperature, which is the value detected by the first blowout temperature sensor 28, and the number of rotations of the electric pump 11 (applied voltage, the amount of hot water Vw supplied to the heater core 17) is compared.
(Liter / min). That is, the first temperature, which is the temperature of the conditioned air sent to the face air passage 19, is controlled.

Here, whether the first temperature can be controlled by controlling the rotation speed of the electric pump 11 will be described with reference to FIG. FIG. 13 shows the temperature of the hot water Tw (hereinafter, Tw (in)) supplied to the heater core 17 when the amount of hot water supplied to the heater core 17 is controlled by changing the voltage applied to the electric pump 11. This is a general representation of a change from the hot water temperature Tw (out) b after exiting from the section 17e. FIG. 13 illustrates that the amount of hot water passing through the heater core 17 is constant, and the amount of hot water Vw is 0 when the electric pump 11 is stopped.

For example, the hot water temperature T
It is assumed that w (in) is Tw1. Then, as shown in FIG. 13, when the amount of hot water Vw is in the range of 0 to 1 liter / min, the state is such that the warm water is slightly flowing into the core 17 e, and the relatively low-temperature warm water in the core 17 e enters It is in a state where minute hot water flows into it. Therefore, the hot water temperature Tw (in) and the hot water temperature Tw (out) increase with an increase in the amount of hot water. At this time, the hot water temperature Tw (out) is a temperature after the heat exchange in the core portion 17e, and is lower than the hot water temperature Tw (in).
Tw1 '. The hot water temperature has such a temperature distribution that the temperature decreases from the hot water inlet side to the hot water outlet side of the core portion 17e.

Further, as shown in FIG. 13, when the amount of warm water is 1 liter / min or more, the warm water existing in the core portion 17e is in a state of being completely washed away by the incoming warm water. For this reason, even if the amount of hot water Vw is increased, the hot water temperature T
w (in) hardly changes. On the other hand, the hot water temperature Tw
(Out) becomes lower than the hot water temperature Tw (in) due to heat exchange with air in the core portion 17e, but the hot water temperature Tw (out) becomes 1 liter / mi because the amount of hot water increases.
It becomes higher than the case of n or less.

That is, as described in the means for solving the above problems, the hot water temperature Tw (out) is not
The amount of heat exchange between the air and the hot water at the hot water inlet side of 7e determines the degree of decrease in the hot water temperature Tw (out). For example, when the amount of hot water increases, the core portion 17
Even when heat is exchanged with air at the hot water inlet side of e, this hot water flows into the hot water outlet side of the core portion 17e without greatly lowering the hot water temperature. Therefore, the temperature of the hot water outlet side of the core portion 17e, that is, the temperature of the hot water temperature Tw (out) increases.

The tendency of the hot water temperature (out) to increase in accordance with such an increase in the hot water amount Vw is that the hot water amount 0
Up to 6 liters / min, hot water volume is 6 liters / min
When the temperature exceeds min, the hot water temperature (out) is saturated and becomes constant. Further, such a behavior differs depending on the hot water temperature Tw by the regulating valve 7, and when the hot water temperature Tw is Tw2, the temperature on the hot water outlet side of the core portion 17e is Tw.
When the hot water temperature Tw is Tw3, the temperature of the hot water outlet side of the core portion 17e becomes Tw3 '.

Therefore, in step S522, the adjustment valve 7
After the valve opening is determined, in step S523, the TAO (upper) is compared with the first temperature, and the rotational speed (applied voltage) of the electric pump 11 is controlled by the variable resistor 13. For example, the temperature of the conditioned air sent to the face air passage 19 can be controlled. For example, TAO (above) is TAO
(Lower) If lower, the applied voltage of the electric pump 11
If the hot water flow rate is set to 6 liters / min or less in the range of 12 V to 12 V, the temperature of the conditioned air blown to the face air passage 19 as shown in FIG. The desired value can be reduced by a predetermined amount. The arrow on the left side of the heater core 17 in FIG. 12 indicates the blowout temperature distribution.

For example, in step S522, the valve opening of the regulating valve 7 is adjusted, and as shown in FIG.
Is Tw1, and the voltage applied to the electric pump 11 is 12
It is assumed that the state is V, which is V. Then, in this state, T
According to the comparison between AO (upper) and the first temperature, when the first temperature is higher, the applied voltage of the electric pump 11 is greatly reduced as the difference between TAO (upper) and the first temperature becomes larger. For example, the voltage applied to the electric pump 11 is the hot water temperature (ou
t) is lowered until the water temperature Tw3 that satisfies the above TAO (upper) is reached, and the state becomes the state b (applied voltage 5 V) in FIG.

As a result, as shown in FIG. 11, it is possible to blow cool air at a desired temperature into the face air passage 19 and blow hot air at a desired temperature into the foot air passage 20. As a result, the occupant can be given a feeling of warmth (head cold foot fever) that feels most comfortable. Also, for example, TSE
If T (top) is the same as TSET (top), TAO (top)
And TAO (lower) have the same value. Therefore, as shown in FIG. 11, if the applied voltage of the electric pump 11 is set to the maximum of 12 V and the amount of hot water is set to the maximum, the face air passage 19
And the temperature of the conditioned air sent to the foot air passage 20 can be made substantially the same, and the same-temperature bi-level mode can be set. As described above, in this example, the bi-level mode for achieving head and foot heat and the bi-level mode for the same temperature can be arbitrarily set according to the feeling of warmth of the occupant.

In this example, when the amount of solar radiation Ts increases according to f (Ts) in Equation 3, the upper target blowing temperature TA
Since O (up) decreases, the voltage applied to the electric pump 11 decreases, and the amount of hot water to the heater core 17 decreases. For this reason, the temperature of the conditioned air blown toward the upper body of the occupant decreases, and the occupant can cancel the hot flash feeling by the solar radiation, and the air conditioning feeling can be improved.

Further, in this manner, a bypass passage is provided to bypass the heating heat exchanger as in the prior art, and when the amount of solar radiation increases, the bypass passage is opened to cancel the amount of heat corresponding to the amount of solar radiation. Therefore, it is possible to cancel the amount of heat corresponding to the amount of solar radiation without providing a bypass passage. As a result, the physique of the vehicle air conditioner can be reduced, and the on-board mountability can be improved.

Next, in the case of the foot mode or the foot differential mode, the vehicle interior is heated in winter or the like, and the heating capacity of the heater core 17 is increased. When the TAO (upper) is higher than the first temperature, the valve element 7b of the regulating valve 7 is rotated by a predetermined amount counterclockwise in FIG. Thereby, for example, as shown in FIG. 11, the hot water inlet 8 and the hot water outlet 10 are fully opened,
The hot water inlet 9 is fully closed. Thus, all of the high-temperature hot water that has passed through the engine 2 is supplied to the heater core 17. As a result, the air heating capacity of the heater core 17 is maximized.

On the other hand, when the above TAO (upper) is lower than the first temperature, the valve element 7b of the regulating valve 7 is rotated by a predetermined amount clockwise in FIG. Thereby, for example, the hot water inlet 8 and the hot water outlet 10 are slightly closed, but the hot water inlet 9 is still closed. As a result, the amount of hot water that has passed through the engine 2 decreases, and the air heating capacity of the heater core 17 decreases. As a result, the first temperature decreases and approaches the TAO (above).

For example, when the vehicle interior is rapidly heated in winter, the value of TAO (above) is much higher than the first temperature. Therefore, in this case,
The valve element 7b is in the maximum heating state. Then, when the vehicle interior is sufficiently heated and the above TAO (upper) becomes lower,
The valve element 7b rotates clockwise in FIG.
The amount of hot water to the air is reduced, and the temperature of the conditioned air is adjusted and controlled.

As described above, in the foot mode and the foot differential mode, the adjusting valve 7 has a function of adjusting the amount of hot water to the heater core 17. And even in such a foot mode and a foot differential mode,
By performing the control in steps S522 and S523 described above, it is possible to provide a difference in the blowout temperature as shown in FIG. 12 or to perform the upper and lower independent temperature control as shown in FIG.

As described above, in the present embodiment, by setting the above hot water amount Tw, TSET (upper), TSE
T (lower), a desired outlet temperature distribution can be adjusted and set according to the air conditioning environment information such as the amount of solar radiation Ts. Further, in this example, the first temperature and the second temperature can be adjusted to desired values by setting the blow-out temperature distribution of the heater core 17 according to the air-conditioning environment information. Can be controlled to the first set temperature TSET (upper), the lower part in the vehicle compartment can be temperature controlled to TSET (upper), and the upper part and the lower part can be independently temperature controlled.

In this embodiment, the heater core 17 is
The vehicle is mounted on the vehicle such that the inlet tank portion 17b is an upper portion and the outlet tank portion 12a is a lower portion. The mounting direction and the like differ depending on the type of vehicle, and the blowout temperature distribution at the heater core 17 differs depending on the mounting direction and the wind speed distribution of the conditioned air passing through the heater core 17.
Therefore, in order to improve the blowout temperature distribution by using the conventional heater core, it is necessary to deal with each vehicle in a complicated manner. However, since the blow-out temperature distribution of the heater core 17 can be controlled by the electric pump 11 as in this example, any control can be easily performed by changing the control specifications of the electric pump 11.

(Second Embodiment) In the first embodiment,
The voltage applied to the electric pump 11 is adjusted and variably controlled. For example, in the bi-level mode, the applied voltage of the electric pump 11, that is, the amount of hot water to May be set to a predetermined value. Thereby, without being influenced by the structural blow-out temperature distribution of the heater core 17,
The first temperature and the second temperature can be substantially equal.
Further, in the high level mode, the occupant can be given an air conditioning feeling of head and foot heat. In addition, the electric pump 11 mentioned here constitutes the hot water amount setting means of the present invention.

(Modification) In the above embodiment,
The mounting position of the heater core 17 on the vehicle is not limited, and the heater core 17 may be arranged so that the inlet tank portion 17b and the outlet tank portion 17a are arranged in a horizontal direction.
May be arranged in an inclined state. Further, the arrangement of the inlet tank 7b and the outlet tank 7a may be reversed in the vertical direction.

In each of the above embodiments, the hot-water heating device of the present invention is applied to a vehicle air conditioner.
It may be used not only for vehicles but also for homes, ships and the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water circuit and a vehicle air conditioner in each embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a vehicle air conditioner in each of the embodiments.

FIG. 3 is a single view of a heater core in each of the embodiments.

FIG. 4 is a diagram illustrating a control system of the vehicle air conditioner in each of the embodiments.

FIG. 5 is a flowchart showing control contents of the vehicle air conditioner in the first embodiment.

FIG. 6 is a diagram illustrating a relationship between TAO and a blowing mode in the first embodiment.

FIG. 7 is a flowchart showing control contents of the vehicle air conditioner in the first embodiment.

FIG. 8 is a flowchart showing control contents of the vehicle air conditioner according to the first embodiment.

FIG. 9 is a flowchart showing control contents of the vehicle air conditioner in the first embodiment.

FIG. 10 shows a state of the adjustment valve 7 in the face mode of the first embodiment.

FIG. 11 shows a state of the regulating valve 7 in the bi-level mode of the first embodiment.

FIG. 12 shows a state of the adjustment valve 7 in the foot mode and the foot differential mode of the first embodiment.

FIG. 13 is an explanatory view of the principle of the present invention.

[Explanation of symbols]

2 ... engine, 7 ... regulating valve, 17 ... heater core, 11 ...
Electric pump, 17e ... core part.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sugi Hikari 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside DENSO Corporation

Claims (11)

[Claims] 1. A heating heat exchanger (17) to which hot water from a hot water source (2) is supplied.
7) In the hot water type heating device, wherein the core portion (17e) that exchanges heat with air is configured such that the hot water flows only in one direction from one end to the other end. The hot water temperature supplied to (17) is
Mixing ratio adjusting means (7) for adjusting the mixing ratio of high-temperature hot water supplied from the hot water source (2) and low-temperature hot water after passing through the heating heat exchanger (17); A hot water heating device comprising: a hot water amount setting means (11, 13) for setting the amount of hot water supplied to the heat exchanger (17). 2. A heating heat exchanger (17) to which hot water from a hot water source (2) is supplied, wherein the heating heat exchanger (1) is provided.
7) In the hot water type heating device, wherein the core portion (17e) that exchanges heat with air is configured such that the hot water flows only in one direction from one end to the other end. The hot water temperature supplied to (17) is
Mixing ratio adjusting means (7) for automatically adjusting the mixing ratio between the high-temperature hot water supplied from the hot water source (2) and the low-temperature hot water after passing through the heating heat exchanger (17); Signal generating means (27, 32, 33) for generating an air conditioning information signal (Ts, TSET (upper), TSET (upper)); and the heating heat exchanger (1) according to the air conditioning information signal.
7) A hot water amount adjusting means (1) for adjusting the amount of hot water supplied to
1, 13). 3. A hot water circulation circuit (10) for circulating hot water from the hot water source (2) to the heating heat exchanger (17).
0) and the heating heat exchanger (1) in the hot water circulation circuit (100).
7) a reflux hot water channel (5) that is provided in parallel with 7) and that guides the low-temperature hot water to the heating heat exchanger (17), bypassing the hot water source (2). (7) is the hot water circulation circuit (1).
00), the hot water supply path (100a) and the reflux hot water path (5) in a hot water supply path (100a) for supplying hot water from the hot water source (2) to the heating heat exchanger (17). And a regulating valve (7) for adjusting the mixing ratio, wherein the hot water amount setting means (11, 13) is provided in the reflux hot water channel (5) with the heating heat. The hot water heating device according to claim 1, characterized in that the heating device is constituted by an electric pump (11, 13) for generating a hot water flow toward the exchanger (17). 4. A hot water circulation circuit (10) for circulating hot water from the hot water source (2) to the heating heat exchanger (17).
0) and the heating heat exchanger (1) in the hot water circulation circuit (100).
7) a reflux hot water channel (5) that is provided in parallel with 7) and that guides the low-temperature hot water to the heating heat exchanger (17), bypassing the hot water source (2). (7) is the hot water circulation circuit (1).
00), the hot water supply path (100a) and the reflux hot water path (5) in a hot water supply path (100a) for supplying hot water from the hot water source (2) to the heating heat exchanger (17). And a regulating valve (7) for adjusting the mixing ratio, wherein the hot water amount adjusting means (11, 13) is provided in the reflux hot water channel (5) with the heating heat. The hot water heating device according to claim 2, characterized in that the heating device is constituted by an electric pump (11, 13) for generating a hot water flow toward the exchanger (17). 5. A vehicle air conditioner to which the hot water heating device according to claim 1 or 3 is applied, wherein the conditioned air passing through a hot water inlet side of the core portion (17e) is directed to a lower part in a vehicle cabin. To the core portion (1
7e), a blowing mode in which the conditioned air passing through the hot water outlet side is blown from an upper portion in the vehicle cabin can be set, and in the blowing mode, the hot water amount setting means (11,
13) setting a first temperature of the conditioned air sent from the upper part, and setting a second temperature of the conditioned air sent from the lower part by the mixing ratio adjusting means (7). Vehicle air conditioner. 6. A vehicle air conditioner to which the hot water type heating device according to claim 2 or 4 is applied, wherein the conditioned air passing through a hot water inlet side of the core portion (17e) is directed to a lower part of a vehicle interior. A blowing mode in which the conditioned air that has passed through the hot water outlet side of the core portion (17e) and blows the conditioned air from an upper portion in the vehicle cabin can be set. Amount adjusting means (11,
13) adjusting the first temperature of the conditioned air blown from the upper portion, and adjusting the second temperature of the conditioned air blown from the lower portion by the mixing ratio adjusting means (7). Vehicle air conditioner. 7. The first air conditioner based on the air conditioning information signal.
First calculating means (S521) for calculating a first target temperature of the temperature (TAO (upper)); and calculating a second target temperature (TAO (lower)) of the second temperature based on the air conditioning information signal. Second calculation means (S52
1) controlling the mixing ratio adjusting means (7) so that the second temperature is equal to the second target temperature (TAO (lower));
Control means (S522); and second control means (S523) for controlling the first temperature to be the first target temperature (TAO (upper)) by the hot water amount adjusting means (11, 13). The vehicle air conditioner according to claim 6, wherein 8. A first setting means (32) for setting, by an occupant, a first set temperature (TSET (upper)), which is the air conditioning information signal in the upper portion, the occupant using the air conditioning information signal in the lower portion. A second setting means (33) for setting a certain second set temperature (TSET (lower)), wherein the first calculating means (step S521) sets at least the first set temperature (TSET (upper)) The first target temperature (TAO (upper)) is calculated based on the second target temperature (TAO (upper)) based on at least the second set temperature (TSET (lower)). (T
AO (lower)) is calculated, The air conditioner for vehicles of Claim 7 characterized by the above-mentioned. 9. The blow-off mode is a bi-level mode in which conditioned air is blown from the upper portion to the upper body of the occupant and from the lower portion to the lower body of the occupant, wherein the first temperature, the second temperature and 6. The vehicle air conditioner according to claim 5, wherein 10. The blow-off mode is a bi-level mode in which conditioned air is blown from the upper portion to the upper body of the occupant and from the lower portion to the lower body of the occupant, and is the air conditioning information signal incident on the vehicle interior. Solar radiation (T
9. The vehicle air conditioner according to claim 6, wherein when s) increases, the temperature of the conditioned air blown toward the upper body of the occupant is reduced by decreasing the amount of hot water. apparatus. 11. An air-conditioning case (14) that houses the heating heat exchanger (17) and forms an air passage into a vehicle cabin; and the heating heat exchanger (17) of the air-conditioning case (14). ), Which are provided on the downstream side of the air and blow air-conditioned air toward the upper portion, and the air of the heating heat exchanger (17) in the air-conditioning case (14). A lower outlet passage (20) that is provided on the downstream side and blows conditioned air toward the lower portion, wherein an inlet of the upper outlet passage (18, 19) is a part of the core portion (17e). The inlet port of the lower outlet passage (20) is open to the downstream side of the hot water, and is connected to the core portion (17e).
The vehicle air conditioner according to any one of claims 5 to 10, wherein the vehicle air conditioner is opened on the upstream side of the hot water.