JP2008155716A - Vehicular air conditioner and air-conditioning controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an amount of air-conditioned air blown out from a face opening part and a foot opening part uniform when an air mix door is set to the maximum heating position side in the state that a blowing mode is set to a by-level mode. <P>SOLUTION: When a first temperature adjustment door 16 is set to the maximum heating position when the set blowing mode is set to the by-level mode, an opening position of the first temperature adjustment door 16 is corrected to the maximum cooling side position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner and the like.

  As an example of a vehicle air conditioner, one described in Patent Document 1 is known. This is because the hot air that has passed through the hot air passage formed by the hot air guide and the cold air that has passed through the cold air passage are mixed in the air mixing chamber, and the mixed conditioned air is selectively blown out from each opening. It is like that.

  Specifically, the configuration is as follows. First, the air introduced into the air conditioning case is cooled by a cooling heat exchanger, and the cooled cold air is heated by the heating heat exchanger by adjusting the opening position of the air mix door and the heating residual heat exchanger. Allocated to cold air to bypass. The hot air heated by the heating heat exchanger reaches the air mixing chamber through the hot air passage formed by the hot air guide, and the cold air bypassing the heating heat exchanger also passes through the cold air passage. It reaches the air mixing chamber and is mixed in the chamber.

  Here, the warm air blown out from the heat exchanger for heating rises along the warm air guide and blows out forward of the air conditioning case by the tip of the warm air guide curved in front of the air conditioning case (cold air passage side). Collect in the air mixing chamber. On the other hand, the cold air blown out from the cooling heat exchanger gathers in the air mixing chamber by being blown out toward the rear of the air conditioning case.

  The conditioned air mixed in the air mixing chamber is, for example, opened according to the switching position of the switching door that adjusts the air volume ratio between the conditioned air blown from the foot opening and the conditioned air blown from the face opening. Air-conditioned air is blown out at a predetermined rate from the section.

Since the face opening is located obliquely above the air mixing chamber and the foot opening is located behind the hot air guide, the conditioned air from the air mixing chamber is separated from the air mixing chamber by the switching door. It is divided into conditioned air that goes obliquely upward and conditioned air that circulates from the air mixing chamber to the rear side of the hot air guide. Of these, the conditioned air that circulates to the rear side of the hot air guide is mainly formed by the flow of cold air.
Japanese Patent Laid-Open No. 2005-22613

  By the way, with the blowing mode set to the bi-level mode in which the conditioned air blown from the face opening and the conditioned air blown from the foot opening are set to the same amount, the opening position of the air mix door is air-conditioned. It has been found that the ratio of the cool air gathering in the air mixing chamber decreases when it is set on the side of the maximum heating position where all of the air introduced into the case is heated by the heating heat exchanger.

  For this reason, the ratio of the conditioned air blown to the foot opening due to the flow of the cold air is reduced. As a result, the ratio of the conditioned air blown from both openings becomes non-uniform, and the air volume of the conditioned air blown to each body part may vary, resulting in a feeling of strangeness.

  The present invention has been made in view of the above circumstances, and the object thereof is a face opening portion when the air mix door is set to the maximum heating position side in a state where the blowing mode is set to the bi-level mode. Another object of the present invention is to provide a vehicle air conditioner or the like that can equalize the amount of air-conditioning air blown from the foot opening.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a vehicle air conditioner that adjusts the temperature of air introduced into the air conditioning case and blows out the air after temperature adjustment into the vehicle interior. The cooling heat exchanger that cools the air introduced into the cooling air and blows out the cold air, the heating heat exchanger that heats the cold air and blows out the hot air, and the cold air that has passed through the cooling heat exchanger is used for the heating. Heated by the cold air passage bypassing the heat exchanger, the cold air passing through the cold air passage, the air mix door for adjusting the air volume ratio of the cold air heated by the heating heat exchanger, and the heating heat exchanger A hot air passage through which the warm air passes, a hot air guide that forms the hot air passage, a downstream portion of the hot air flow is directed toward the cold air passage, and the cold air that has passed through the cold air passage. And the warm air that has passed through the warm air passage And an air mixing chamber for generating conditioned air, a face opening from which the conditioned air from the air mixing chamber is blown, and a position on the opposite side of the hot air passage through the hot air guide, A foot opening that blows conditioned air from the air mixing chamber; a switching door that switches an air volume ratio between the conditioned air blown to the face opening and the conditioned air blown to the foot opening; The switching door is set to a switching position where the conditioned air blown from the face opening and the conditioned air blown from the foot opening are set to have the same amount, and When the opening position is set to an opening position at which the cool air heated by the heating heat exchanger is larger than the cold air passing through the cold air passage, the opening position of the air mix door is set in the air conditioning case. It is characterized in all the introduced air to and a correction control means for correcting to a maximum cooling position side to Haifu the cool air passage.

  According to the invention of claim 1, by correcting the opening position of the air mix door to the maximum cooling position side, the amount of the cool air blown into the air mixing chamber is increased. As a result, the air volume of the conditioned air that circulates to the rear side of the hot air guide increases, and the air volume of the conditioned air that is blown out to the foot opening increases. Thereby, the difference between the air volume of the conditioned air blown from the face opening and the air volume of the conditioned air blown from the foot opening is reduced, and an appropriate air conditioning feeling can be secured.

  According to a second aspect of the present invention, the correction control means has the same amount of the conditioned air blown from the face opening and the conditioned air blown from the foot opening as to the opening position of the air mix door. It is characterized by correcting to the opening position.

  According to the invention of claim 2, the air conditioning feeling of the occupant can be optimized.

  In the invention of claim 3, the correction control means heats all of the air introduced into the air conditioning case with the opening position of the air mix door set by the setting means by the heat exchanger for heating. When the maximum heating position is set, the opening position of the air mix door is corrected.

  When the air mix door is set to the maximum heating position, the cold air blown into the air mixing chamber is interrupted, and the conditioned air to the foot opening due to the flow of the cold air is significantly reduced. Moreover, since the warm air blown into the air mixing chamber flows from the downstream side to the upstream side of the air flow, the flow of the warm air to reach the foot opening becomes a U-turn shape, so that pressure loss is reduced. By becoming large, the warm air blown out to the foot opening is remarkably reduced, and the air conditioning sensation is most easily felt.

  In the invention of claim 3, when the air mix door is set to the maximum heating position, the switching position of the switching door is corrected to eliminate the unevenness in the amount of warm air blown from both openings. An air-conditioning sensation can be provided.

  According to a fourth aspect of the present invention, there is provided an air conditioning control device comprising correction control means used in the air conditioning device according to any one of the first to third aspects. The invention according to claim 4 has the same effect as described above, and therefore the description thereof is omitted.

<First Embodiment>
An embodiment of a vehicle air conditioner according to the present invention will be described with reference to FIGS. 1 to 3. The vehicle air conditioner of the present embodiment switches the foot face when the set blowing mode is the bi-level mode and the opening position of the first temperature adjustment door 16 is set to the maximum heating position. The switching position of the door 29 is corrected.

  FIG. 1 shows a cross-sectional view of the air conditioning unit 10. The air conditioning unit 10 is arranged in the mounting direction indicated by the arrows in the figure with respect to the longitudinal direction and the vertical direction of the vehicle, and an air passage that flows toward the vehicle interior is formed. Also, a blower unit (not shown) is provided, and switches between outside air (vehicle compartment outside air) and inside air (vehicle compartment air) and introduces the introduced air into the air passage of the air conditioning unit 10.

  The air conditioning unit 10 includes an air conditioning case 11 in which each component constituting the unit 10 is accommodated and an air passage is formed therein. The air conditioning case 11 is integrated in a state in which each component is housed inside two case halves that are divided into left and right parts.

  As shown in the figure, an air conditioner case 11 includes an evaporator 12 as a cooling heat exchanger and a heater core 13 as a heating heat exchanger. An air inlet space 14 into which air blown out from the blower unit flows is formed in the frontmost part of the air conditioning case 11.

  The evaporator 12 is disposed substantially vertically at a portion immediately after the air inlet space 14. As is well known, the evaporator 12 absorbs the latent heat of evaporation of the refrigerant circulating in the refrigeration cycle from the air and cools the air. On the downstream side of the air flow of the evaporator 12 (the vehicle rear side), a heater core 13 is arranged substantially in parallel with a predetermined interval. The heater core 13 reheats the air that has passed through the evaporator 12, and high-temperature hot water (cooling water) flows from an internal combustion engine mounted on a vehicle (not shown) into the heater core 13, and heats the air using this hot water as a heat source. To do. The heater core 13 has a known configuration having a heat exchanging core 13a composed of flat tubes and corrugated fins.

  Above the heater core 13, a cold air bypass passage 15 (cold air passage) that bypasses the heater core 13 and passes cold air is formed.

  Between the evaporator 12 and the heater core 13, the 1st temperature adjustment door 16 and the 2nd temperature adjustment door 17 which consist of flat plate doors are arrange | positioned so that rotation is possible centering on the rotating shafts 16a and 17a, respectively.

  The first temperature adjustment door 16 corresponds to a door generally referred to as an air mix door, and the rotation shaft 16 a is disposed immediately above the upper end portion of the heater core 13. The first temperature adjustment door 16 rotates in the vertical direction about the rotation shaft 16a. The rotating shaft 17a of the second temperature adjusting door 17 is disposed on the upstream side (vehicle front side) of the air flow on the lower end side of the heater core 13, and the second temperature adjusting door 17 rotates in the vertical direction around the rotating shaft 17a. To do.

  A first inlet air passage 18a and a second inlet air passage 18b are arranged in parallel in the vertical direction on the upstream side (vehicle front side) of the heat exchange core 13a of the heater core 13. The first inlet ventilation path 18 a is disposed at a position closer to the upper side of the air flow upstream of the heat exchange core 13 a of the heater core 13 (part on the cold air bypass path 15 side), and the second inlet ventilation path 18 b is the heat of the heater core 13. The replacement core 13a is disposed in a lower portion (portion away from the cold air bypass passage 15) on the upstream side of the air flow of the replacement core 13a.

  In addition, the 1st inlet ventilation path 18a is arrange | positioned so that it may open to the site | part by the side of the cold wind bypass channel 15. The second inlet ventilation path 18b is disposed so as to open to a portion on the side farther from the cold air bypass path 15 than the first inlet ventilation path 18a.

  As shown in FIG. 1, the contact surface 19a at the tip of the first temperature adjusting door 16 and the second temperature are provided between the upper first inlet ventilation path 18a and the lower second inlet ventilation path 18b. A partition wall 19 having a curved surface 19b covering the rotating shaft 17a of the adjustment door 17 is disposed. The partition wall 19 is formed integrally with the air conditioning case 11, and guides the passing air flowing through the first inlet ventilation path 18 a and the second inlet ventilation path 18 b, so that the heat exchange core 13 a of the heater core 12 is formed. It plays the role of an air guide member that uniformly flows air into the entire vertical direction.

  Therefore, the partition wall 19 extends over the entire region in the vehicle width direction (perpendicular to the plane of FIG. 1) inside the air conditioning case 11 and from the vehicle front side end (evaporator side end) of the partition wall 19 to the vehicle rear side end. It arrange | positions so that it may incline diagonally downward toward a part (heater core side edge part).

  The rotating shaft 16a of the first temperature adjusting door 16 and the rotating shaft 17a of the second temperature adjusting door 17 are both rotatably supported by bearing holes (not shown) on the left and right wall surfaces of the air conditioning case 11. And one end part of both rotating shaft 16a, 17a protrudes the exterior of the air-conditioning case 11, and is connected to a temperature adjustment operation mechanism via the link mechanism which is not shown in figure, The 1st temperature adjustment door 16 and this temperature adjustment operation mechanism are connected. The second temperature adjustment door 17 is rotated in conjunction with it.

  This temperature adjustment operation mechanism is composed of an electric drive mechanism using a servo motor, and rotates the first temperature adjustment door 16 and the second temperature adjustment door 17 by the rotational power of the servo motor. In addition, you may use the manual type thing which rotates the 1st temperature adjustment door 16 and the 2nd temperature adjustment door 17 directly with a passenger | crew's manual operation force as a temperature adjustment operation mechanism.

  The first temperature adjustment door 16 adjusts the opening degree of the cold air bypass passage 15 and the first inlet air passage 18a, thereby passing the first inlet air passage 18a and warm air heated by the heater core 13 (see FIG. 3). The air volume ratio between the arrow WH shown) and the cool air passing through the cool air bypass passage 15 (arrow WC shown in FIG. 1) is adjusted. On the other hand, the second temperature adjustment door 17 supplementarily adjusts only the amount of warm air that passes through the second inlet air passage 18 b and is heated by the heat exchange core 13 a of the heater core 13.

  Here, as shown in FIG. 1, the first inlet ventilation path 18 a opened and closed by the first temperature adjustment door 16 is ventilated compared to the second inlet ventilation path 18 b opened and closed by the second temperature adjustment door 17. The road area is large. The second temperature adjustment door 17 plays an auxiliary role of the first temperature adjustment door 16 from the ventilation path area.

  In the present embodiment, the opening degree of the second temperature adjustment door 17 changes substantially proportionally according to the opening degree change of the first temperature adjustment door 16. That is, the solid line position where the first temperature adjustment door 16 and the second temperature adjustment door 17 fully close the first inlet ventilation path 18a and the second inlet ventilation path 18b is the maximum cooling position. Therefore, when the first and second temperature adjustment doors 16 and 17 are set to the maximum cooling position, all of the air introduced into the air conditioning case 11 bypasses the heater core 13.

  On the other hand, the two-dot chain line position where the first temperature adjusting door 16 and the second temperature adjusting door 17 fully open the first inlet ventilation path 18a and the second inlet ventilation path 18b is the maximum heating position. Therefore, when the first and second temperature adjustment doors 16 and 17 are set to the maximum heating position, all of the air introduced into the air conditioning case 11 is heated by the heater core 13.

  When the first temperature adjustment door 16 increases the door opening from the maximum cooling position indicated by the solid line toward the maximum heating position indicated by the two-dot chain line, the second temperature adjustment door 17 is also indicated by the maximum cooling position indicated by the solid line. The doors 16 and 17 are interlocked so as to increase the door opening toward the maximum heating position indicated by the two-dot chain line.

  A hot air guide 20 is formed at a predetermined interval between the heater core 13 and the heater core 13 on the downstream side (vehicle rear side) of the heater core 13. The warm air guide 20 extends in the vertical direction, and includes a wall surface in which a tip portion 20A (a portion on the downstream side of the warm air flow) is curved on the vehicle front side (cold air bypass passage side). 11 is integrally formed. The warm air guide 20 forms a warm air passage 21 that extends upward immediately after the heater core 13.

  An air mixing unit 22 that merges with the downstream side of the cold air bypass passage 15 in the upper part of the heater core 13 on the downstream side (the vehicle upper side) of the hot air passage 21 and mixes the cold air and the hot air to generate conditioned air. Is formed.

  Therefore, as shown in FIG. 1, the first temperature adjusting door 16 and the second temperature adjusting door 17 are provided with cold air (arrow WC shown in FIG. 1) and hot air (arrow shown in FIG. 3) flowing into the air mixing unit 22. Adjust the air volume ratio with WH). Further, the second temperature adjustment door 17 plays an auxiliary role of the first temperature adjustment door 16 because of its ventilation path area.

  A defroster opening 23 into which conditioned air whose temperature is adjusted from the air mixing unit 22 flows in an approximately middle portion in the vehicle front-rear direction on the upper surface of the air conditioning case 11 is opened. The defroster opening 23 is connected to a defroster opening (not shown) that opens into the vehicle compartment via a defroster duct (not shown), and air-conditioned air is blown from the defroster opening toward the inner surface of the front window glass of the vehicle. .

  The defroster opening 23 is opened and closed by a flat defroster door 24. The defroster door 24 is rotatable about a rotation shaft 25, and switches the defroster opening 23 and the communication port 26 to open and close. The communication port 26 serves as a passage for flowing the conditioned air from the air mixing unit 22 toward the face opening 27 and the foot opening 28.

  The face opening 27 is provided on the upper surface of the air conditioning case 11 at a site on the vehicle rear side (close to the occupant) with respect to the defroster opening 23. The face opening 27 is connected to a face air outlet (not shown) that opens into the vehicle compartment via a face duct (not shown), and air-conditioned air is blown from the face air outlet toward the passenger's upper body side in the vehicle compartment. The

  The face opening 27 and the foot opening 28 are opened and closed by a foot face switching door 29. The foot face switching door 29 is constituted by a flat door that is rotatable about a rotating shaft 30.

  The foot opening 28 is disposed below the face opening 27 and on the rear side (vehicle rear side) of the hot air guide 20. A foot outlet passage 31 is further formed below the foot opening 28 downward. In the middle of the vertical direction of the foot outlet passage 31, front seat foot outlets 32 are opened in the left and right side surfaces of the air conditioning case 11, and air conditioning is performed from the left and right foot openings 32 to the feet of the front seat occupant. The wind is blown out.

  A rear seat foot opening 33 is opened at the lower end of the foot outlet passage 31. A rear-seat foot duct (not shown) is connected to the rear-seat foot opening 33, and air conditioning is performed from the rear-seat-side foot outlet 33 provided at the front end of the rear-seat foot duct to the feet of the rear-seat occupant. Blow the wind.

  The defroster door 24 and the foot face switching door 29 constitute a blowing mode door for switching the blowing mode, and are operated in conjunction by a link mechanism (not shown). Examples of the blowing mode that can be set include a defroster mode, a face mode, a bi-level mode, and a foot mode. The defroster mode is a mode in which conditioned air is blown out only to the defroster opening 23. The face mode is a mode in which conditioned air is blown only to the face opening 27. The bi-level mode is a mode in which the same amount of conditioned air is blown out to the face opening 27 and the foot opening 28. Finally, the foot mode is a mode in which conditioned air is blown out only to the foot opening 28.

  Therefore, the air introduced into the air conditioning case 11 from the air inlet space 14 becomes cool air after being cooled by the evaporator 12, and is guided to the cool air bypass passage 15 according to the opening position of the first temperature adjustment door 16. And cold air led to the heater core 13.

  The cold air that has passed through the cold air bypass passage 15 reaches the air mixing chamber 22 as an air flow toward the rear of the vehicle. The cool air guided to the heater core 13 becomes warm air after being heated by the heater core 13, passes through the warm air passage 21, and reaches the air mixing chamber 22. The flow of warm air until it passes through the heater core 13 and reaches the air mixing chamber 22 rises upward in the vehicle by the warm air guide 20 and then the front of the vehicle by the tip 20A of the warm air guide 20 (on the cold air bypass passage 15 side). The flow direction is changed.

  The cold air and the hot air that have reached the air mixing chamber 22 are mixed in the mixing chamber 22 to become air-conditioned air, and the air-conditioned air is blown out to an opening that is open in accordance with a set blowing mode. .

  FIG. 2 shows the configuration of an air conditioner ECU 50 for controlling each component device provided in the present embodiment and its peripheral devices. The air conditioner ECU 50 sets the opening positions of the first temperature adjustment door 16 and the second temperature adjustment door 17 by operating the various actuators 81 and 82, and the switching position of the defroster door 24 and the foot face switching door 29. Set.

  The air conditioner ECU 50 receives a sensor signal from a known sensor group 60 and an operation signal from an operation panel 70 provided in the passenger compartment. The sensor group 60 includes an outside air temperature sensor 61 that detects the temperature outside the vehicle interior, an inside air temperature sensor 62 that detects the temperature inside the vehicle interior, a solar radiation amount sensor 63 that detects the amount of solar radiation in the vehicle interior, and the cold air blown from the evaporator 12. A post-evaporator temperature sensor 64 for detecting the temperature of the water and a water temperature sensor 65 for detecting the temperature of the cooling water flowing into the heater core 13 are provided. Further, as the driving means 80 for driving the doors 16, 17, 24, and 29, the driving motor 81 that rotationally drives the first and second temperature adjusting doors 16, 17, the defroster door 24, and the foot face switching door 29. A drive motor 82 and the like for driving are provided.

  The air conditioner ECU 50 sets the blowing mode and the blowing temperature in accordance with the sensor signal from the sensor group 60 and the operation signal from the operation panel 70 based on the occupant setting operation. And based on the blowing mode and blowing temperature which were set, various actuators 81 and 82 are driven and predetermined | prescribed air-conditioning control is performed. The air conditioner ECU 50 corresponds to setting means and correction control means described in claims.

  Hereinafter, an operation when the blowing mode is set to the bi-level mode will be described. When the blowing mode is set to the bi-level mode, the defroster door 24 is switched to a position where the defroster opening 23 is fully closed, and the foot face switching door 29 is blown out from the face opening 27 and the foot opening 28. The conditioned air is switched to a position where the amount is the same (the illustrated position in FIG. 3). Accordingly, the conditioned air in the air mixing chamber 22 circulates from the air mixing chamber 22 to the rear side of the hot air guide 20 and the conditioned air blown obliquely upward to the face opening 27. Evenly distributed to the conditioned air blown to the foot opening 28. In addition, the conditioned air blown out to the foot opening 28 is formed mainly by the flow of cold air toward the vehicle rear side.

  If the first temperature adjustment door 16 is set to the maximum heating position when the blowing mode is set to the bi-level mode, the flow of the conditioned air is as follows. That is, all the cool air that has passed through the evaporator 12 is heated by the heater core 13 to become warm air, passes through the warm air passage 21, passes through the air mixing chamber 22, and is then blown out to the openings 27 and 28. . And the flow of the warm air blown out from the warm air passage 21 to the air mixing chamber 22 is mainly the flow toward the front side of the vehicle, and thereafter obliquely rearward and upward along the first temperature adjustment door 16 and the defroster door 24. The conditioned air blown to the face opening 27 increases (arrow WH1 in FIG. 3).

  On the other hand, a part of the hot air blown out from the air mixing chamber 22 flows in a U-turn shape along the hot air guide 20 and is blown out to the foot opening 28. As described above, Since the flow is mainly directed obliquely rearward and upward, the amount of warm air blown out to the foot opening 28 is greatly reduced (arrow WH2 in FIG. 3). As a result, the amount of warm air blown from the face opening 27 and the amount of warm air blown from the foot opening 28 are not uniform.

  In the present embodiment, the air conditioner ECU 50 opens the first temperature adjustment door 16 when the opening position of the first temperature adjustment door 16 is set to the maximum heating position when the blowing mode is set to the bi-level mode. Correct the degree position to the maximum cooling position.

  The corrected opening position (solid line position in FIG. 3) is a position where the amount of warm air blown out from both openings 27 and 28 is the same, and the opening position is obtained by experiment. It can be determined based on the actually measured opening or the theoretically estimated opening.

  When the first temperature adjustment door 16 is set to the corrected opening position, the cool air flows into the cool air bypass passage 15 and the cool air flows into the air mixing chamber 22. The cool air flowing into the air mixing chamber 22 flows substantially horizontally toward the rear of the vehicle. Accordingly, a part of the warm air in the air mixing chamber 22 that is directed to the face opening 27 is directed to the foot opening 28 by the flow of the cold air, and is thus blown out to the foot opening 28. As the warm air increases and the warm air blown to the face opening 27 decreases, the air volume of the warm air blown to both the openings 27 and 28 becomes uniform.

  Although the opening position of the first temperature adjustment door 16 is set to the maximum heating position, the first temperature adjustment door 16 is blown out to the openings 27 and 28 by correcting from the maximum heating position to the maximum cooling position side. There is a concern that the temperature of hot air will decrease. However, assuming the situation where the first temperature adjustment door 16 is set to the maximum heating position, usually, the required heating capacity at the initial stage of heating is often high. Therefore, in most cases, the temperature of the hot air blown into the vehicle compartment is sufficiently higher than the temperature in the vehicle compartment. The inconvenience of decline is not a problem.

  In the present embodiment, when the first temperature adjustment door 16 is set to the maximum heating position when the blowing mode is set to the bi-level mode, the opening position of the first temperature adjustment door 16 is set to the maximum cooling position side. It is corrected to. Thereby, since the warm air blown out to the foot opening part 28 increases, the variation in the air volume of the conditioned air blown out from both the opening parts 27 and 28 can be suppressed, and an appropriate air conditioning feeling can be provided.

  In addition, since the corrected opening position is set to a position where the amount of hot air blown out from both openings 27 and 28 is the same, the hot air blown out from both openings 27 and 28 is made uniform. Can provide an optimal air conditioning feeling.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  In the above embodiment, when the opening position of the first temperature adjustment door 16 is set to the maximum heating position, the temperature adjustment door 16 is corrected to the maximum cooling position side. Correction may also be made when the opening position of the door 16 is set at a position on the maximum heating side where the cold air heated by the heater core 13 is larger than the cold air passing through the cold air bypass passage 15. This is because when the opening position of the first temperature adjustment door 16 is set to the maximum heating side position, the amount of cold air blown into the air mixing chamber 22 is reduced, and thereby the conditioned air to the foot opening 28 is reduced. This is because it decreases. Therefore, even in such a case, it is possible to provide an appropriate air conditioning feeling by correcting the opening position of the first temperature adjustment door 16.

It is sectional drawing of the air conditioning unit of the vehicle air conditioner by embodiment of this invention. It is the block diagram which showed the structure of air-conditioner ECU and a peripheral device. It is sectional drawing which showed the state of bilevel mode and the maximum heating in an air conditioning unit part.

Explanation of symbols

11 ... Air conditioning case 12 ... Evaporator (cooling heat exchanger)
13 ... Heater core (heat exchanger for heating)
15 ... Cold air bypass passage (cold air passage)
16 ... 1st temperature control door (air mix door)
17 ... second temperature adjusting door 20 ... warm air guide 21 ... warm air passage 22 ... air mixing chamber 50 ... air conditioner ECU (setting means, correction control means)

Claims (4)

A vehicle air conditioner that adjusts the temperature of air introduced into an air conditioning case and blows out the air after temperature adjustment into a vehicle interior,
A cooling heat exchanger that cools the air introduced into the air conditioning case and blows out cold air;
A heating heat exchanger for heating the cold air and blowing out hot air;
A cold air passage through which the cold air that has passed through the cooling heat exchanger bypasses the heating heat exchanger;
An air mix door for adjusting the air volume ratio between the cold air passing through the cold air passage and the cold air heated by the heating heat exchanger;
A hot air passage through which the hot air heated by the heat exchanger for heating passes,
A hot air guide that forms the hot air passage, and the downstream portion of the hot air flow is directed toward the cold air passage;
An air mixing chamber for generating conditioned air by mixing the cold air that has passed through the cold air passage and the hot air that has passed through the hot air passage;
A face opening through which air-conditioned air from the air mixing chamber is blown;
A foot opening through which the conditioned air is blown from the air mixing chamber, disposed at a position opposite to the hot air passage through the hot air guide;
A switching door for switching the air volume ratio between the conditioned air blown to the face opening and the conditioned air blown to the foot opening;
The switching door is set to a switching position where the conditioned air blown from the face opening and the conditioned air blown from the foot opening are set to the same amount, and the opening of the air mix door When the position is set to an opening position where the amount of cold air heated by the heating heat exchanger is larger than that of the cold air passing through the cold air passage, the opening position of the air mix door is introduced into the air conditioning case. A vehicle air conditioner comprising correction control means for correcting all of the air to the maximum cooling position side that distributes air to the cold air passage. The correction control means includes
The opening position of the air mix door is corrected to an opening position at which the conditioned air blown from the face opening and the conditioned air blown from the foot opening have the same amount. Item 2. The vehicle air conditioner according to Item 1. The correction control means includes
The air mix when the opening position of the air mix door set by the setting means is set to a maximum heating position where all of the air introduced into the air conditioning case is heated by the heat exchanger for heating. The vehicle air conditioner according to claim 1, wherein the opening position of the door is corrected.   The air-conditioning control apparatus provided with the said correction control means used for the air-conditioning apparatus in any one of Claims 1-3.

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