JP4971963B2 - Air conditioner for automobile - Google Patents

Description

  The present invention relates to an automotive air conditioner in which fixed guides for guiding cold air and hot air are respectively set at a confluence portion of a cold air passage passing through an evaporator and a hot air passage passing through a heater core.

  2. Description of the Related Art Conventionally, as an air conditioner for an automobile, one in which a door for guiding warm air from a warm air passage to a warm air outlet is set (see, for example, Patent Document 1).

2. Description of the Related Art Conventionally, as an air conditioner for an automobile, one in which a fixed guide that guides cold air and hot air is set at a joining portion of a cold air passage that passes through an evaporator and a hot air passage that passes through a heater core is known (for example, Patent Document 2).
Japanese Patent No. 3021618 JP 2004-237940 A

  However, in the air conditioner for automobiles described in Patent Document 1, since warm air is guided using a door, a door actuator for opening and closing the door is required, resulting in high cost. There was a problem.

  Moreover, in the air conditioning apparatus for automobiles described in Patent Document 2, although the above problem can be solved by adopting a fixed guide, the fixed guide blows hot air from the hot air passage. A plurality of hot air guide plates that lead to the outlet direction, and a plurality of cold air passage holes that are orthogonal to the hot air guide plates and guide the cold air from the cold air passage toward the vent outlet.

  In other words, since one type of hot air guide plate is arranged as a fixed guide by arranging a plurality of hot air guide plates at intervals that secure the cold air passage holes, a function of guiding the hot air to the hot air outlet while blocking the cold air can be achieved. However, it cannot achieve the function of guiding the cool air to the cool air outlet while blocking the hot air.

  Therefore, the cold air that has passed through the plurality of cold air passage holes cannot be mixed with the hot air at a position immediately after the passage or draw in the air that has passed through the heater core, and the necessary amount of cold air cannot be guided toward the vent outlet. . For this reason, there has been a problem that the desired temperature control performance cannot be obtained at the start of cooling in summer or the like when it is desired to lower the passenger compartment temperature in a short time.

  The present invention has been made paying attention to the above problems, and achieves high temperature control performance by guiding the required amount of hot air and cold air to the hot air outlet and the cold air outlet while using a low-cost device. An object of the present invention is to provide an automotive air conditioner that can perform the above-described operation.

In order to achieve the above object, according to the present invention, an evaporator and a heater core are arranged in a unit case, and cold air from the cold air passage is supplied to a confluence portion of the cold air passage passing through the evaporator and the hot air passage passing through the heater core. In an automotive air conditioner that sets a fixed guide that leads to a cold air outlet and guides the hot air from the hot air passage to the hot air outlet,
The fixed guide includes a first guide plate that guides the hot air to the hot air outlet while blocking the cool air, and a second guide plate that guides the cold air to the cold air outlet while blocking the hot air ,
The first guide plate is a plate that guides warm air from a warm air passage that passes through the heater core to a defrost outlet, and opens an upstream plate end to the warm air passage, and a downstream plate end to the defrost blower. Open towards the exit,
The second guide plate is a plate that guides cold air from a cold air bypass passage that bypasses the heater core to a vent outlet, and opens an upstream plate end to the cold air bypass passage, and a downstream plate end as the vent outlet. Provided in contact with the inner surface of the unit case
The first guide plate has a V-shaped cross section, and the inner circumferential side V along the flow of hot air from the hot air passage while blocking the cold air by the outer peripheral side V surface that receives the cold air from the cold air bypass passage. It is a plate that guides hot air to the defrost outlet by the surface,
The second guide plate has a V-shaped cross section, and blocks the warm air by the outer peripheral side V surface that receives the warm air from the warm air passage, and the inner circumferential side along the flow of the cold air from the cold air bypass passage. It is a plate that guides cold air to the vent outlet through the V surface,
The first guide plate is a single plate that guides the warm air to the defrost outlet, and the cool air openings that allow the cool air to pass from the cool air bypass passage in a set state in the unit case are located on both sides of the plate. Set,
The second guide plate is a pair of plates that are set on both sides of the first guide plate and guides the cool air to the vent outlet, and the warm air from the warm air passage passes through the unit case in a set state. The feature is that a hot air opening that allows the air flow is set between a pair of plates .

Therefore, in the automotive air conditioner of the present invention, in the first guide plate of the fixed guide, the hot air from the hot air passage is guided to the hot air outlet while blocking the cold air from the cold air passage. Then, in the second guide plate of the fixed guide, the cool air from the cool air passage is guided to the cool air outlet while blocking the warm air from the hot air passage.
That is, since two types of guide plates are used as the components of the fixed guide, the function of guiding the hot air to the hot air outlet while blocking the cold air (first guide plate function) and the cooling of the cold air while blocking the hot air are performed. The function of guiding to the air outlet (second guide plate function) is achieved.
Furthermore, since the amount of hot air and cold air can be adjusted by the size of the two types of guide plates, the necessary amount of cold air can be guided to the cold air outlet and the required amount of hot air can be guided to the hot air outlet. be able to. In other words, high temperature control performance can be obtained by setting the required amount of cold air and the amount of required hot air according to the vehicle requirements of various vehicle types.
As a result, high temperature control performance can be achieved by guiding the required amount of hot air and cold air to the hot air outlet and the cold air outlet while using a low-cost device with a fixed guide that does not require a door actuator.

  Hereinafter, the best mode for realizing an air conditioner for automobiles of the present invention will be described based on Example 1 shown in the drawings.

First, the configuration will be described.
FIG. 1 is a longitudinal side view showing the automotive air conditioner of the first embodiment. FIG. 2 is a side view showing a fixed guide in the automotive air conditioner of the first embodiment. FIG. 3 is a front view showing a fixed guide in the automotive air conditioner of the first embodiment. FIG. 4 is a plan view showing a fixed guide in the automotive air conditioner of the first embodiment.

  As shown in FIG. 1, the automotive air conditioner of Embodiment 1 includes a unit case 1, an evaporator 2, a heater core 3, a cold air bypass passage 4 (cold air passage), a hot air passage 5, and a cold air passage 6. , Vent outlet 7 (cold air outlet), defrost outlet 8 (hot air outlet), fixed guide 9, first vent door 10, second vent door 11, differential door 12, and first cold air side air mix door 13. And a second cold air side air mix door 14 and a hot air side air mix door 15.

  As shown in FIG. 1, the automotive air conditioner of Embodiment 1 includes an evaporator 2 and a heater core 3 disposed in a unit case 1, and a cold air bypass passage 4 that passes through the evaporator 2 and a temperature that passes through the heater core 3. A fixed guide 9 that guides the cool air from the cold air bypass passage 4 to the vent air outlet 7 and guides the warm air from the hot air passage 5 to the defrost air outlet 8 is set at a confluence portion of the air passage 5.

  The evaporator 2 is a heat exchanger that is set in a longitudinal direction at an upstream position in the unit case 1 and draws heat from wind sent from a blower unit (not shown) to produce cold air. In the evaporator 2, a refrigerant circulating in the in-vehicle refrigeration cycle flows.

  The heater core 3 is a heat exchanger that is set in the unit casing 1 at a position downstream of the evaporator 2 in an oblique direction and heats the wind that has passed through the evaporator 2 to generate hot air. Engine cooling water (warm water) is circulated through the heater core 3.

  As shown in FIG. 1, the fixed guide 9 includes a first guide plate 91 that guides the warm air from the warm air passage 5 to the defrost outlet 8 while blocking the cool air from the cold air bypass passage 4. The second guide plate 92 guides the cool air from the cold air bypass passage 4 to the vent outlet 7 while blocking the warm air from the air passage 5.

  The first guide plate 91 is a plate that guides the warm air from the warm air passage 5 passing through the heater core 3 to the defrost outlet 8, and the upstream plate end 91a is connected to the warm air passage as shown in FIG. 5, and the downstream plate end 91 b is opened toward the defrost outlet 8.

  The second guide plate 92 is a plate that guides the cool air from the cool air bypass passage 4 that bypasses the heater core 3 to the vent outlet 7. As shown in FIG. 1, the upstream plate end 92 a is connected to the cold air bypass passage 4. The downstream plate end 92b is provided in contact with the inner surface of the unit case 1 connected to the vent outlet 7.

  As shown in FIGS. 2 to 4, the first guide plate 91 has a V-shaped cross section and blocks the cold air by the outer peripheral side V surface 91 c that receives the cold air from the cold air bypass passage 4. It is a plate that guides the warm air to the defrost outlet 8 by the inner peripheral V surface 91d along the flow of the warm air from the passage 5. As shown in FIG. 2, the V-shaped ridgeline 91e of the first guide plate 91 has a smooth curved arch in a side view so as to exhibit a high hot air guide function to the defrost outlet 8 while suppressing cold air resistance. The line.

  As shown in FIGS. 2 to 4, the second guide plate 92 has a V-shaped cross section and blocks the warm air by the outer peripheral side V surface 92 c that receives the warm air from the warm air passage 5. The plate guides the cool air to the vent outlet 7 by the inner peripheral side V surface 92d along the flow of the cool air from the cool air bypass passage 4. As shown in FIGS. 2 and 3, the V-shaped ridgeline 92e of the second guide plate 92 is a straight line in a side view so as to exhibit a high cold air guide function to the vent outlet 7 while suppressing the cold air resistance. And extends to the inner surface of the unit case 1 connected to the vent outlet 7.

  The first guide plate 91 is a single plate that guides the warm air to the defrost outlet 8 as shown in FIGS. 2 to 4, and is set in the unit case 1 as shown in FIG. 3. Cold air openings 16 and 16 that allow the passage of cold air from the cold air bypass passage 4 are set at positions on both sides of the plate.

  2 to 4, the second guide plate 92 is a pair of plates 92L and 92R that are set at both side positions of the first guide plate 91 and guide the cool air to the vent outlet 7. As shown in FIG. 2, a hot air opening 17 that allows passage of warm air from the warm air passage 5 in a set state in the unit case 1 is set between the pair of plates 92L and 92R.

Next, the operation will be described.
The actions in the air conditioner for an automobile of the first embodiment are changed to “a hot vent phenomenon preventing action in the vent / diff mode”, “a cool def phenomenon preventing action in the vent / diff mode”, and “independent temperature control action in the vent / diff mode”. Separately described.

[Cool differential prevention in vent / def mode]
For example, when vent / def mode is selected, the temperature of the temperature-controlled air blown from the vent outlet is not changed to eliminate window fogging during traveling, and the temperature is higher from the defrost outlet toward the front window. There is a request to blow out warm air.

  However, in an automotive air conditioner that is generally mounted on a vehicle, the temperature of the warm air that blows out from the defrost outlet is mixed with the warm air that goes to the vent outlet at the confluence of the cold air and the hot air. A so-called cool differential phenomenon occurs.

  On the other hand, in the automotive air conditioner of the first embodiment, as shown in FIG. 5, in the first guide plate 91 of the fixed guide 9, while the cool air from the cool air bypass passage 4 is blocked, The warm air is guided to the defrost outlet 8.

  At this time, since the second guide plates 92L and 92R have a V-shaped cross section, as shown in FIG. 6, the warm air from the warm air passage 5 is warmed without increasing the warm air ventilation resistance. The warm air guide action which guides the warm air in an orderly manner toward the defrost outlet 8 is shown.

  Furthermore, since the first guide plate 91 has a V-shaped cross section, as shown in FIG. 7, the cold air from the cold air bypass passage 4 can be blocked without increasing the cold air ventilation resistance. it can.

  For this reason, in the confluence | merging site | part of cold air and warm air, cold air and warm air mutually flow by the fixed guide 9, and the cold wind which goes to the vent blower outlet 7 mixes with the warm air which goes to the defrost blower outlet 8, and a defrost blower outlet Thus, the so-called cool def phenomenon, in which the temperature of the hot air blown out from 8 is lowered, can be prevented.

  Therefore, when the vent / diff mode is selected, if only the differential temperature is set to a high temperature, the temperature of the temperature-controlled air blown from the vent blower outlet 7 is not changed, and hot hot air from the defrost blower outlet 8 is directed toward the front window. Can be blown out.

[Preventing hot vent phenomenon in vent / def mode]
For example, when the vent / def mode is selected, the temperature of the passenger compartment is lowered during traveling, so the temperature of the warm air blown from the defrost outlet to the front window is not changed, and the vent outlet is entered into the passenger compartment. There is a demand to reduce only the temperature of the temperature-controlled air blown out.

  However, in an automotive air conditioner that is generally mounted on a vehicle, the warm air that is directed to the defrost outlet is mixed with the cold air that is directed to the vent outlet at the confluence of the cold air and the hot air, and the temperature-controlled air blown from the vent outlet is A so-called hot vent phenomenon occurs in which the temperature is increased.

  On the other hand, in the automotive air conditioner of the first embodiment, as shown in FIG. 5, the second guide plates 92L and 92R of the fixed guide 9 block the hot air from the hot air passage 5 while blocking the cold air bypass. Cold air from the passage 4 is guided to the vent outlet 7.

  At this time, since the second guide plates 92L and 92R have a V-shaped cross section, as shown in FIG. 6, the warm air from the warm air passage 5 is warmed without increasing the warm air ventilation resistance. The wind can be cut off.

  Further, since the first guide plate 91 has a V-shaped cross section, as shown in FIG. 7, the first guide plate 91 faces the vent outlet 7 without increasing the cold air ventilation resistance against the cold air from the cold air bypass passage 4. It shows the cold air guide action that guides cool air in an orderly manner.

  For this reason, in the confluence | merging part of cold air and warm air, cold air and warm air mutually flow by the fixed guide 9, and the warm air which goes to the defrost blower outlet 8 mixes with the cold wind which goes to the vent blower outlet 7, and vent blower outlet The so-called hot vent phenomenon in which the temperature of the cold air blown out from 7 is raised can be prevented.

  Accordingly, when only the vent temperature is set to a low temperature when the vent / def mode is selected, the temperature of the warm air blown from the defrost outlet 8 toward the front window is not changed, and the temperature is lowered from the vent outlet 7 toward the vehicle interior. Can blow out the temperature controlled air.

[Independent temperature control in vent / def mode]
As described above, in the automotive air conditioner of Example 1, the warm air from the warm air passage 5 is blocked in the first guide plate 91 of the fixed guide 9 while the cool air from the cold air bypass passage 4 is blocked. In the second guide plate 92 of the fixed guide 9, the cool air from the cool air bypass passage 4 is guided to the vent air outlet 7 while blocking the warm air from the warm air passage 5.

  That is, since the two types of the first guide plate 91 and the second guide plate 92 are employed as the constituent elements of the fixed guide 9, the first guide plate function for guiding the warm air to the defrost outlet 8 while blocking the cool air, The second guide plate function for guiding the cool air to the vent outlet 7 while blocking the wind is achieved.

  Therefore, for example, when the vent / diff mode is selected, the vent blowing temperature and the defrost blowing temperature can be independently adjusted while preventing the cool def phenomenon and the hot vent phenomenon.

  Furthermore, since the amount of hot air and cold air can be adjusted by the size of the two types of guide plates 91 and 92, the necessary amount of cold air can be guided to the vent outlet 7 and the necessary amount of hot air can be defrosted. It can lead to the blower outlet 8. In other words, high temperature control performance can be obtained by setting the required amount of cold air and the amount of required hot air according to the vehicle requirements of various vehicle types.

Next, the effect will be described.
In the automotive air conditioner of Embodiment 1, the effects listed below can be obtained.

  (1) The evaporator 2 and the heater core 3 are arranged in the unit case 1, and the cold air bypass passage 4 is connected to the confluence of the cold air bypass passage 4 passing through the evaporator 2 and the hot air passage 5 passing through the heater core 3. In an automotive air conditioner in which a fixed guide 9 is provided that guides cold air to a cold air outlet and guides hot air from the hot air passage 5 to the hot air outlet, the fixed guide 9 Since the first guide plate 91 that leads to the hot air outlet and the second guide plate 92 that guides the cold air to the cold air outlet while blocking the hot air are provided, the cost is low due to the fixed guide 9 that does not require a door actuator. High temperature control performance can be achieved by guiding the required amount of hot air and cold air to the hot air outlet and the cold air outlet while using the apparatus.

  (2) The first guide plate 91 is a plate that guides the warm air from the warm air passage 5 passing through the heater core 3 to the defrost outlet 8, and opens the upstream plate end 91a to the warm air passage 5. The downstream plate end 91b is opened toward the defrost outlet 8 and the second guide plate 92 is a plate for guiding the cold air from the cold air bypass passage 4 bypassing the heater core 3 to the vent outlet 7. Since the upstream plate end 92a is opened to the cold air bypass passage 4 and the downstream plate end 92b is provided in contact with the inner surface of the unit case 1 connected to the vent outlet 7, the hot air and cold air in the unit case 1 merge. An air mix space in an open state is not formed at the site, and a high separation air distribution performance that neatly separates hot air and cold air can be achieved.

  (3) The first guide plate 91 has a V-shaped cross section, and the cool air is blocked by the outer peripheral V surface 91c that receives the cool air from the cool air bypass passage 4, while the warm air from the warm air passage 5 is blocked. The second guide plate 92 has a V-shaped cross section and receives the warm air from the warm air passage 5 through the inner circumferential V surface 91d along the flow. This is a plate that guides the cool air to the vent outlet 7 by the inner peripheral V surface 92d along the flow of the cool air from the cool air bypass passage 4 while blocking the warm air by the side V surface 92c. Regardless of the flow system of the cold air, any system can exhibit a high guide function for guiding the wind to the outlet while keeping the airflow resistance low.

  (4) The first guide plate 91 is a single plate that guides the warm air to the defrost outlet 8, and allows the cool air to pass through the cool air bypass passage 4 in a set state in the unit case 1. The openings 16 and 16 are set at both sides of the plate, and the second guide plate 92 is a pair of plates 92L and 92R that sets the both sides of the first guide plate 91 and guides the cool air to the vent outlet 7. Since the hot air opening 17 that allows the passage of hot air from the hot air passage 5 in the set state in the unit case 1 is set between the pair of plates 92L and 92R, the fixed guide 9 causes the cold air with a wide opening area. By setting the openings 16, 16 and the hot air opening 17, it is possible to suppress the airflow resistance and to make the fixed guide 9 have a simple configuration with a small number of parts.

  As mentioned above, although the air conditioner for motor vehicles of this invention has been demonstrated based on Example 1, it is not restricted to this Example 1 about a concrete structure, The invention which concerns on each claim of a claim Design changes and additions are permitted without departing from the gist of the present invention.

  In the first embodiment, an example in which a rear seat-front seat communication door is set on the passage partition walls of the rear seat side passage and the front seat side passage is shown. However, the rear seat-front seat communication door may be omitted.

  In the first embodiment, an example in which the first guide plate and the second guide plate are plates having a V-shaped cross section is shown. However, the cross-sectional shape of the guide plate may be a U-shaped cross-section, a semicircular cross-section, or the like, or the cross-sectional shapes of the first guide plate and the second guide plate may be different.

  In Example 1, the example of the defrost blower outlet was shown as a warm air blower outlet, and the example of the vent blower outlet was shown as a cold wind blower outlet. However, the hot air outlet may be a foot outlet, and the cold air outlet may be a side vent outlet or a rear vent outlet.

  In short, the fixed guide that guides the cold air from the cold air passage to the cold air outlet and guides the hot air from the hot air passage to the hot air outlet, the first guide plate that guides the hot air to the hot air outlet while blocking the cold air, The first embodiment is not limited to the first embodiment as long as the second guide plate is configured to guide the cold air to the cold air outlet while blocking the hot air.

  In the first embodiment, an example of application to an air conditioner for an automobile that performs only the air conditioning of the front seat of the automobile is shown, but the present invention can also be applied to an air conditioner for an automobile that performs air conditioning of the front and rear seats of the automobile. In short, the present invention can be applied to any automobile air conditioner in which fixed guides for guiding the cold air and the hot air are respectively set at the confluence of the cold air passage passing through the evaporator and the hot air passage passing through the heater core.

It is a vertical side view which shows the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a side view which shows the fixed guide in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a front view which shows the fixed guide in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a top view which shows the fixed guide in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is an effect explanation perspective view showing a warm air flow and a cold air flow by a fixed guide in the air conditioning system for vehicles of Example 1. It is an effect explanatory view showing the warm air flow by the fixed guide in the automobile air conditioner of Example 1. It is an effect explanatory view showing the cold wind flow by the fixed guide in the automobile air conditioner of Example 1.

Explanation of symbols

1 Unit case 2 Evaporator 3 Heater core 4 Cold air bypass passage (cold air passage)
5 Hot air passage 6 Cold air passage 7 Vent outlet (cold air outlet)
8 Defrost outlet (hot air outlet)
9 Fixed guide
91 First guide plate
91a Upstream plate end
91b Downstream plate end
91c Outer peripheral side V surface
91d Inner circumference V surface
92 (92L, 92R) Second guide plate
92a Upstream plate end
92b Downstream plate end
92c Outer peripheral side V
92d Inner peripheral side V surface 10 First vent door 11 Second vent door 12 Differential door 13 First cold air side air mix door 14 Second cold air side air mix door 15 Hot air side air mix door 16 Cold air opening 17 Hot air opening

Claims (1)

An evaporator and a heater core are arranged in the unit case, and the cold air from the cold air passage is led to the cold air outlet to the confluence of the cold air passage that passes through the evaporator and the hot air passage that passes through the heater core. In an automotive air conditioner with a fixed guide that guides the warm air to the warm air outlet,
The fixed guide includes a first guide plate that guides the warm air to the warm air outlet while blocking the cool air;
A second guide plate that guides the cold air to the cold air outlet while blocking the hot air ,
The first guide plate is a plate that guides warm air from a warm air passage that passes through the heater core to a defrost outlet, and opens an upstream plate end to the warm air passage, and a downstream plate end to the defrost blower. Open towards the exit,
The second guide plate is a plate that guides cold air from a cold air bypass passage that bypasses the heater core to a vent outlet, and opens an upstream plate end to the cold air bypass passage, and a downstream plate end as the vent outlet. Provided in contact with the inner surface of the unit case
The first guide plate has a V-shaped cross section, and the inner circumferential side V along the flow of hot air from the hot air passage while blocking the cold air by the outer peripheral side V surface that receives the cold air from the cold air bypass passage. It is a plate that guides hot air to the defrost outlet by the surface,
The second guide plate has a V-shaped cross section, and blocks the warm air by the outer peripheral side V surface that receives the warm air from the warm air passage, and the inner circumferential side along the flow of the cold air from the cold air bypass passage. It is a plate that guides cold air to the vent outlet through the V surface,
The first guide plate is a single plate that guides the warm air to the defrost outlet, and the cool air openings that allow the cool air to pass from the cool air bypass passage in a set state in the unit case are located on both sides of the plate. Set,
The second guide plate is a pair of plates that are set on both sides of the first guide plate and guides the cool air to the vent outlet, and the warm air from the warm air passage passes through the unit case in a set state. An air conditioner for automobiles characterized in that a hot air opening that allows air flow is set between a pair of plates .

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