JP3296084B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adjusts the amount of air passing through a heating means and the amount of air bypassing the heating means by moving a flexible film-like member having an opening. The present invention relates to an air conditioner that regulates the temperature of air blown into a vehicle.

[0002]

2. Description of the Related Art As described above, an air conditioner for adjusting the temperature of air blown into a room by moving a flexible film-like member is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-257720. Air conditioners are known. This prior art employs rotating shafts 101 and 102 as shown in FIG.
Are rotatably provided in the air conditioning case 103. By connecting both ends of a film door 104 as a flexible film member to the rotating shafts 101 and 102, the film door 104 is disposed so as to cross the hot air passage 105 and the bypass passage 106. I have. Then, the rotating shafts 101 and 102 are rotated to move the film door 104 in the transverse direction, and the film door 10 is moved.
4 by moving the opening 107 (see FIG. 9), the amount of warm air passing through the warm air passage 105 and the bypass passage 1
06, the amount of cool air passing through is adjusted to control the temperature of air blown into the vehicle interior.

Here, the hot air passage 105 and the bypass passage 1
The positional relationship between the opening 06 and the opening 107 of the film door 104 will be described with reference to FIG. 9A and 9B are development views of the film door 104, wherein FIG. 9A shows a state of maximum cooling, FIG. 9B shows a state of temperature adjustment, and FIG. 9C shows a state of maximum heating. As described above, the film door 104 moves between the position shown in FIG. 9A and the position shown in FIG. 9C, but is opened by the opening 107 in the temperature control state shown in FIG. 9B. The distance between the hot air passage 105 and the bypass passage 106 opened by the opening 107 becomes shorter. Therefore, the warm air that has passed through the hot air passage 105 and the cool air that has passed through the bypass passage 106 are immediately mixed, and the air whose temperature has been firmly adjusted is blown into the vehicle interior.

[0004]

In the case of the above prior art,
Since the air whose temperature has been firmly adjusted is blown into the passenger compartment, there is a problem that it is inconvenient when a vertical temperature difference is required, for example, in a bi-level mode. In view of the above problems, an object of the present invention is to provide an air conditioner capable of giving a sufficient temperature difference to the temperature of air blown into a room.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a blower for generating an air flow, an air passage for guiding air from the blower into a room, and an air passage. A heating unit disposed in the passage and heating the air, wherein the air passage is configured such that air from the blowing unit passes through the heating unit, and air from the blowing unit bypasses the heating unit. Having a bypass passage,
A flexible film member is provided in the air passage so as to cross the hot air passage and the bypass passage. The film member has a first member through which air from the air blower passes.
An opening and a second opening are formed, and an air shield is formed between the first opening and the second opening, and an interval between the first opening and the second opening is Moving means for moving the film-like member in the transverse direction, wherein the air shielding portion is provided so as to cover the entirety of the bypass passage when the first opening portion opens the entirety of the warm air passage; An air conditioner comprising: a moving means, wherein the first opening portion opens the entire hot air passage and the air shielding portion shields the entire bypass passage. Moving the member in a direction in which the first opening moves away from the bypass passage, and wherein the second opening opens the bypass passage from a side far from the hot air passage to a side closer to the hot air passage. Features.

According to the second aspect of the present invention, a blowing means for generating an air flow, an air passage for guiding the air from the blowing means into a room, and a heating means disposed in the air passage for heating the air The air passage has a hot air passage in which air from the blowing means passes through a heating means, and a bypass passage in which air from the blowing means bypasses the heating means. Is provided with a flexible film-like member so as to cross the hot air passage and the bypass passage, and the film-like member has a first opening and a second opening through which air from the blowing means passes. And an air shielding portion is formed between the first opening and the second opening, and an interval between the first opening and the second opening is the second opening. When the air opens the entire hot air passage, An air conditioner provided with a moving unit for moving the film-shaped member in the transverse direction, wherein the moving unit includes a moving unit that moves the membrane member in the transverse direction. The film-shaped member that is open to the entire bypass passage and the air shielding portion is shielding the entire hot air passage, the second opening is moved in a direction away from the hot air passage, The first opening is configured to open the warm air passage from a side far from the bypass passage to a side closer to the bypass passage.

Further, as described in claim 3, claim 1
In the air conditioner according to any one of the first to third aspects, the room may be a vehicle interior of a vehicle, and the air from the air blowing unit may be supplied to the air passage at a position where hot air that has passed through the hot air passage is easily guided. Forming a lower outlet passage leading to the foot of an occupant in the room; and an upper outlet passage for guiding air from the air blowing means to the upper body of the occupant at a position in the air passage where air passing through the bypass passage is easily led. It may be formed.

Further, as described in claim 4, claim 1
4. The air conditioner according to any one of claims 3 to 3, wherein one end of the film-shaped member is connected to a first rotatable shaft rotatably provided, and the other end of the film-shaped member is rotatably provided. The moving means may be connected to a second rotating shaft, and the moving means may be constituted by a driving means for rotating the first rotating shaft and the second rotating shaft.

The term "hot air passage" as used in the first and second aspects of the present invention means not only an air passage which has passed through the heating means but also an air passage which has not passed through the heating means. is there. The first aspect of the present invention is the first aspect.
The state in which the opening opens the entire hot air passage refers to the state in which the first opening opens the hot air passage the largest during the movement of the membrane member.

The state in which the second opening opens the entire bypass passage means the state in which the second opening opens the bypass passage in the course of movement of the membrane member. That means.

[0011]

According to the first, third and fourth aspects of the present invention,
The first member formed on the film-like member is moved by moving the flexible film-like member disposed across the hot air passage and the bypass passage in the air passage in the crossing direction by the moving means. The area where the opening and the hot air passage overlap, and the area where the second opening formed in the membrane member and the bypass passage overlap each other are changed. As a result, the amount of air passing through the hot air passage and the amount of air passing through the bypass passage are adjusted, and the temperature of air blown into the room is adjusted.

When the film-like member is located at a position where the first opening portion opens the entire hot air passage and the air shielding portion shields the entire bypass passage, the moving means moves the film-like member.
The first opening moves in a direction away from the bypass passage. By this movement, the air shielding portion gradually shields the hot air passage from the side closer to the bypass passage to the side farther from the bypass passage, and the second opening opens the bypass passage closer to the side closer to the hot air passage from the side farther from the warm air passage. Open gradually toward. In other words, during this movement, the warm air passage opened by the first opening and the bypass passage opened by the second opening become far from each other.

Therefore, part of the warm air passing through the warm air passage is:
The air that is blown into the room without mixing with the air that has passed through the bypass passage, and a portion of the air that has passed through the bypass passage is blown into the room without being mixed with the warm air that has passed through the hot air passage. As a result, air with a sufficient temperature difference is blown into the room. According to the second, third and fourth aspects of the present invention, when the film-shaped member is located at a position where the second opening opens the entire bypass passage and the air shielding portion is located at a position where the entire air passage is shielded. Moves the film-shaped member in a direction in which the second opening moves away from the hot air passage. Due to this movement, the air shielding portion gradually shields the bypass passage from the side closer to the warm air passage to the side farther from the warm air passage, and the first opening forms the warm air passage closer to the side closer to the warm air passage from the side farther from the bypass passage. Open gradually toward. In other words, during this movement, the warm air passage opened by the first opening and the bypass passage opened by the second opening become far from each other.

Therefore, similarly to the first aspect of the present invention, air with a sufficient temperature difference is blown into the room. Particularly, as in the third aspect of the present invention, a lower air outlet passage is formed in the air passage at a position where the hot air that has passed through the hot air passage is likely to be guided, to guide the air from the air blowing means to the feet of the occupant in the passenger compartment. In the case where an upper outlet passage for guiding air from the blowing means to the upper body of the occupant is formed at a position in the air passage where air passing through the bypass passage is easily guided, the air is blown to the feet of the occupant. Temperature difference between the air blown into the upper body and the air blown into the upper body.

[0015]

Next, an embodiment using the air conditioner of the present invention as an air conditioner for an automobile will be described with reference to FIGS. 1 and 2 are views showing an air conditioning unit of an air conditioner for a vehicle. The automotive air conditioner 1
An air conditioner, which is an auto air conditioner, which is disposed in a center console in a vehicle cabin;
Control unit 3 that electrically controls each air conditioner and automatically controls the temperature and amount of air blown into the vehicle cabin
(Hereinafter referred to as ECU).

The air-conditioning unit 2 comprises a blowing means 4, a cooling means 5, a heating means 6, a unit case 7, an air mix door 8, an air outlet switching means 9, and the like. The blowing means 4 includes a first centrifugal fan 4a,
a, which is provided coaxially with the centrifugal fan
(Not shown) and a blower motor 10 as a driving means for these. This blower motor 10
The blower voltage applied to is controlled by the ECU 3,
The rotational speeds of the two centrifugal fans are determined by the magnitude of the blower voltage. The rotation speeds of the two centrifugal fans can be continuously changed between a maximum air flow (Hi) and a minimum air flow (Lo). In addition, both centrifugal fans have suction port 11
The air taken in from FIG. 2 is blown into the vehicle interior through the unit case 7.

The cooling means 5 is an evaporator housed in the unit case 7, and is provided with a compressor (not shown), a condenser (not shown), and a pressure reducing means (not shown) which are rotated by the internal combustion engine. It is a well-known thing which comprises a refrigeration cycle. The evaporator 5 exchanges heat between the low-temperature and low-pressure refrigerant from the decompression means and the air flowing in the unit case 7, and cools the air using the heat of vaporization.

The heating means 6 is a heat exchanger called a heater core disposed on the lee side of the evaporator 5 in the unit case 7, and includes cooling water heated by a water jacket of the internal combustion engine and air flowing through the unit case 7. And heat exchange, and heat the air. The unit case 7 constitutes an air passage referred to in the present invention, and is formed of resin. Inside the unit case 7, a warm air passage 12, a first cool air passage 13, and a second cool air passage 14 are formed.

The hot air passage 12 is an air passage before and after the cold air passing through the evaporator 5 passes through the heater core 6. Also the first
The cool air passage 13 is a bypass passage according to the present invention,
It is formed on the side of the warm air passage 12 via the first support wall 15. The second cool air passage 14 is formed on the side of the hot air passage 12 via the second support wall 16. The first cool air passage 13 and the second cool air passage 14 are air passages through which the cool air that has passed through the evaporator 5 bypasses the heater core 6. Then, the warm air passing through the warm air passage 12, the first cold air passage 1
The cool air that has passed through 3 and the cool air that has passed through the second cool air passage 14 mix with each other in the air mix area 17.

In this embodiment, the opening dimension La of the hot air passage 12 and the opening dimension Lb 1 of the first
The relationship with the opening dimension Lb2 of the cool air passage 14 is set so as to satisfy the relationship shown in the following Expression 1.

[0021]

[Lambda] Lb1 + Lb2 The first support wall 15 is for regulating the mounting position of the heater core 6 in the unit case 7, and the hot air passage 1
2 and the first cold air passage 13. Note that the first support wall 15 is made of a material that does not allow air to pass therethrough.

The second support wall 16 regulates the position of the heater core 6 in the unit case 7 and separates the hot air passage 12 from the second cold air passage 14. Note that the second support wall 16 is made of a material that does not allow air to pass therethrough. Further, a defroster outlet 23, a face outlet 24, and a foot outlet 25 are formed on the side wall of the unit case 7. Defroster outlet 23
Is an outlet for mainly blowing hot air toward the inner surface of the windshield of the automobile. The face outlet 24
An outlet that mainly blows out cool air toward the occupant's head and chest, and communicates with the air mix area 17 through a face passage 26 that constitutes an upper outlet passage according to the third aspect of the present invention. The foot outlet 25 is an outlet that mainly blows out warm air toward the feet of the occupant. The foot outlet 25 is connected to the air mixing area 17 via the foot passage 27 that constitutes the lower outlet passage according to the third aspect of the present invention. Communicating.

The air mix door 8 is a film door made of a flexible film-like member laminated with a resin such as PPS or nylon, and has a first opening 33 and a second opening 34 as shown in FIG. Four of each are formed. FIG. 3 is a diagram showing the positional relationship between the operating position of the air mix door 8 and the hot air passage 12, the first cold air passage 13, and the second cold air passage 14 in each air conditioning state.

As shown in FIG. 3A, the second opening 34
Opens the entire first cold air passage 13, the air shield 35 formed between the first opening 33 and the second opening 34 shields the entire hot air passage 12. FIG.
As shown in (c), when the first opening 33 opens the entire hot air passage 12, the air shield 35 shields the entire first cold air passage 13.

The opening width Lf1 of the first opening 33 and the opening width Lf2 of the second opening 34 are formed so as to satisfy the following equations (2) and (3).

[0026]

[Equation 2] Lf1 ≒ La

[0027]

Lf2 ≒ Lb1 The width Ld of the air shielding portion 35 is formed so as to satisfy one of the following equations (4) and (5).

[0028]

[Equation 4] Ld ≒ La + Lc1

[0029]

Ld ≒ Lb1 + Lc1 where Lc1 is the width of the first support wall 15. One end of such an air mix door 8 is, as shown in FIG.
The drive shaft 31 is rotatably supported by the unit case 7, and the other end is connected to a driven shaft 32 rotatably supported by the unit case 7. The air mix door 8 includes a first support wall 15 and a second support wall 16.
The second cold air passage 14, the hot air passage 12, and the first cold air passage 13 are stretched in sliding contact with each other. In this embodiment, the first rotating shaft and the second rotating shaft according to the invention described in claim 4 are constituted by a driving shaft 31 and a driven shaft 32.

The drive shaft 31 is driven to rotate by a step motor 37, and the rotation of the drive shaft 31 is transmitted to the driven shaft 32 via a timing belt 38 (FIG. 2) stretched outside the unit case 7. . The step motor 37 is an electric motor (drive means) that receives a pulse signal output from the ECU 3 and rotates the drive shaft 31 by a mechanical angle corresponding to the number of pulses.

As described above, when the drive shaft 31 and the driven shaft 32 rotate and the air mix door 8 moves,
The air mix door 8 is in the operating position (door opening SW = 0) in the maximum cooling state (Max Cool) shown in FIG.
%) From the intermediate state (Middl) shown in FIG.
e) through the operating position (SW = 50%), the operating position (S) in the maximum heating state (Max Hot) shown in FIG.
W = 100%).

In this embodiment, in order to continuously move the air mix door 8 from the operating position in the maximum cooling state to the operating position in the maximum heating state, the number of pulses to the step motor 37 needs to be, for example, 3200. is there. Also,
The opening areas of the first opening 33 and the second opening 34 are, as shown in the graph of FIG. 4, the amount of air passing through the hot air passage 12 and passing through the first cold air passage 13 and the second cold air passage 14. The amount of air to be released is determined by the door opening degree SW of the air mix door 8.
Is determined to have linearity with respect to. Thereby, as shown in the graph of FIG. 5, the temperature of the air blown into the vehicle compartment becomes linear with respect to the door opening degree SW.

The outlet switching means 9 is specifically a film door made of a flexible thin film laminated with a resin such as PPS or nylon. The film door 9 includes a drive shaft 41, a driven shaft 42 rotatably supported by the unit case 7,
It is stretched between the intermediate shafts 43 and has a plurality of openings (not shown). The film door 9 is moved between the drive shaft 41 and the driven shaft 42, and the opening and the outlets 23 to
The face mode in which cold air is mainly blown out from the face air outlet 24 toward the upper body of the occupant by changing the area where the airbag 25 overlaps, the foot mode in which hot air is mainly blown out from the foot air outlet 25 toward the foot of the occupant, the face A bi-level mode in which cold air is mainly blown out from the air outlet 24 toward the upper body of the occupant and hot air is mainly blown out from the foot air outlet 25 toward the foot of the occupant, and a defroster air outlet 23 is provided on the inner surface of the windshield of the automobile. The outlet mode is selected from among the defroster modes that mainly blow hot air toward the outlet.

The drive shaft 41 of the film door 9 is driven to rotate by a step motor 44.
The rotation of 1 is transmitted to the driven shaft 42 via a timing belt (not shown). The step motor 44 is an electric motor (drive means) having a structure similar to that of the step motor 37. The ECU 3 is used as control means, and includes a CPU,
It includes a ROM, a RAM, and the like, and is itself well known. The ECU 3 is connected to a battery (not shown) via an ignition switch (not shown). The ECU 3 previously stores in ROM an input signal and the like input from an inside air temperature sensor, an outside air temperature sensor, a solar radiation amount sensor, a post-evaporation temperature sensor, a water temperature sensor, a blow-out temperature sensor, and an operation panel (all not shown). Based on the control program, each drive means such as the blower motor 10 and the step motors 37 and 44 is controlled to automatically control the air-conditioning state in the vehicle compartment.

Next, the operation of this embodiment having the above configuration will be briefly described. When the air mix door 8 is at the position shown in FIG. 3A, the step motor as the moving means in the present invention rotates the drive shaft 31 clockwise in FIG. The rotation of the drive shaft 31 is transmitted to the driven shaft 32 via the timing belt 38, and the driven shaft 32 rotates clockwise in FIG. By the rotation of the driven shaft 32, the air mixing door 8 is wound around the driven shaft 32, and the air mixing door 8 is moved from the position shown in FIG.
Move in the direction of.

By this movement, as shown in FIG. 3 (a), the second opening 3 opening the entire first cold air passage 13 is opened.
4 moves in a direction away from the hot air passage 12 as shown in FIG. At the same time, the first opening 33
Open the warm air passage 12 from the side far from the first cool air passage 13 to the near side, that is, gradually from the left end of the warm air passage 12 in FIG. The air mix door 8
Cannot move further than the position shown in FIG.

When the air mix door 8 is at the position shown in FIG. 3C, the step motor rotates the drive shaft 31 in the counterclockwise direction in FIG. The air mix door 8 is wound around the drive shaft 31 by the rotation of the drive shaft 31,
The air mix door 8 is moved from the position shown in FIG.
Move in the direction of (b). By this movement, FIG.
The first opening 33 that has opened the entire hot air passage 12 as shown in FIG. 3C moves in a direction away from the first cold air passage 13 as shown in FIG. At the same time, the second opening 34 connects the first cold air passage 13 to the hot air passage 12.
From the far side to the near side, that is, the first cold air passage 1
3 gradually opens leftward from the right end in FIG. In addition,
The air mix door 8 cannot move further than the position shown in FIG.

In this embodiment, the openings 33 and 34 of the air mix door are formed as described above, and the air mix door 8 is moved as described above. In the position shown, the hot air passage 12 opened by the first opening 33 is formed at a predetermined distance from the first support wall 15, and the second opening 34
The first cold air passage 13 opened by the first support wall 1
5 is formed at a place separated by a predetermined distance.

As a result, as can be seen from FIG. 6, the warm air passage 12 and the first cool air passage 13 are far from each other, so that a part of the warm air passing through the warm air passage 12 passes through the first cool air passage 13. It is guided to the foot passage 27 without being mixed with the passed cold air, and a part of the cold air that has passed through the first cold air passage 13 is not mixed with the warm air that has passed through the hot air passage 12 to the face passage 26. Be guided. As a result, foot outlet 2
As shown in FIG. 7, the difference between the temperature of the air blown out from the air outlet 5 and the temperature of the air blown out from the face air outlet 24 can be made larger than that in the related art.

The solid line A in FIG. 7 indicates the opening SW of the air mix door 8 in the bi-level mode of this embodiment.
The solid line B shows the relationship between SW and the temperature of the air blown out of the face air outlet 24 in the bilevel mode of the present embodiment. 7 shows the relationship between the opening degree SW of the film door 104 and the temperature of the air blown out from the foot outlet in the above-described prior art bi-level mode, and the dashed line D shows the above-mentioned prior art bi-level mode. SW in mode
And the relationship between the temperature and the temperature of the air blown out from the face outlet.

As described above, in the present embodiment, when the outlet mode is set to the bi-level mode, it is possible to make a sufficient difference between the temperature of the air blown from the face outlet 24 and the temperature of the air blown from the foot outlet 25. Therefore, a comfortable air conditioning feeling can be given to the occupant. In this embodiment, the driving means described in claims 1 and 2 and the driving means described in claim 4 are replaced with a drive shaft 3.
1 and a timing belt 38 for transmitting the rotation of the drive shaft 31 to the driven shaft 32.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of an air conditioning unit according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of the air conditioning unit.

FIG. 3 is a diagram illustrating a positional relationship between an operating position of an air mixing door and a hot air passage, a first cold air passage, and a second cold air passage in each air conditioning state.

FIG. 4 shows the relationship between the air mix door opening degree of the above embodiment and
It is a graph which shows the amount of air which passes through each passage.

FIG. 5 is a graph showing the temperature of the air blown into the vehicle compartment with respect to the opening degree of the air mix door.

FIG. 6 is a sectional view showing a part of the air conditioning unit.

FIG. 7 is a comparison data showing the temperature of each air blown out from the face air outlet and the foot air outlet in the bi-level mode for the present embodiment and the conventional example.

FIG. 8 is a cross-sectional view showing the entire configuration of the conventional air conditioning unit.

FIG. 9 is a diagram showing a positional relationship between an opening of a film door and each passage in the conventional example.

[Explanation of symbols]

 Reference Signs List 6 heater core (heating means) 8 air mixing door (membrane member) 12 hot air passage 13 first cold air passage (bypass passage) 26 face passage (upper outlet passage) 27 foot passage (lower outlet passage) 31 drive shaft ( (First rotation axis) 32 driven shaft (second rotation axis) 33 first opening 34 second opening 35 air shielding part

Claims (4)

(57) [Claims] An air passage for generating air flow, an air passage for guiding air from the air blower into a room, and a heating means disposed in the air passage for heating the air; Has a hot air passage through which air from the blowing means passes through a heating means, and a bypass passage through which air from the blowing means bypasses the heating means. A flexible film-like member is provided so as to cross the bypass passage, and the film-like member has a first opening and a second opening through which air from the blowing means passes,
An air shielding portion is formed between the first opening and the second opening, and an interval between the first opening and the second opening is the first opening.
An air conditioner provided with a size that the air shielding portion is sized to shield the entirety of the bypass passage when the opening opens the entirety of the warm air passage, and a moving unit that moves the film-shaped member in the transverse direction. In the apparatus, the moving means may be configured such that the first opening portion opens the entire hot air passage, and the air shielding portion shields the entirety of the bypass passage. An air conditioning system wherein the first opening moves in a direction away from the bypass passage, and the second opening opens the bypass passage from a side far from the warm air passage to a side closer to the warm air passage. apparatus. 2. An air passage, comprising: a blower for generating an air flow; an air passage for guiding the air from the blower into a room; and a heating unit disposed in the air passage for heating the air. Has a hot air passage through which air from the blowing means passes through a heating means, and a bypass passage through which air from the blowing means bypasses the heating means. A flexible film-like member is provided so as to cross the bypass passage, and the film-like member has a first opening and a second opening through which air from the blowing means passes,
An air shielding portion is formed between the first opening and the second opening, and an interval between the first opening and the second opening is the second opening.
An air conditioner provided with a size that the air shielding portion is sized to shield the entirety of the bypass passage when the opening opens the entirety of the warm air passage, and a moving unit that moves the film-shaped member in the transverse direction. In the apparatus, the moving means may be a film-like member in a state where the second opening opens the entirety of the bypass passage and the air shielding portion shields the entirety of the hot air passage. The second opening moves in a direction away from the warm air passage, and the first opening moves.
An air conditioner wherein the opening is configured to open the warm air passage from a side far from the bypass passage to a side closer to the bypass passage. 3. The room is a vehicle interior of a vehicle, and the air from the blower is supplied to a position in the air passage where hot air passing through the hot air passage is easily guided. A lower outlet passage is formed to lead to the feet of the occupant, and an upper outlet passage is formed at a position in the air passage where air passing through the bypass passage is easily led to the upper body of the occupant. The air conditioner according to claim 1, wherein the air conditioner is operated. 4. A second rotating shaft, wherein one end of the film-shaped member is connected to a first rotating shaft rotatably provided, and the other end of the film-shaped member is rotatably provided. The air conditioner according to any one of claims 1 to 3, wherein the moving unit is configured by a driving unit that rotates the first rotation shaft and the second rotation shaft.