JP2008126730A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of effectively utilizing latent heats to complement heating or cooling in a compartment for predetermined hours, after supplying of a heat exchanging medium to a heat exchanger is stopped, without giving blowing resistance when operating an air conditioner while minimizing an occupied space and realizing low costs with a simple structure. <P>SOLUTION: An evaporator 5, an air mix door 6, and a heater core 7 are sequentially arranged in an air-conditioning case 2 from an upstream blower 3 toward downstream blow-out ports 14, 15, 16, 17. A warm air passage 8 passing through the evaporator 5 and the heater core 7, a cool air bypass passage 9 passing through the evaporator 5 and bypassing the heater core 7, and an air mix chamber 10, in which the warm air is merged with the cool air, are formed in an air-conditioning unit 1A. A first thermal storage sheet 18 for warm temperature is set on a case wall forming a downstream side passage of the heater core 7, depending on arrangement along a flow of air. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner in which a cooling heat exchanger, an air mix door, and a heating heat exchanger are arranged in order from an upstream blower side to a downstream outlet side in an air conditioning case.

  Conventionally, an evaporator (cooling heat exchanger), an air mix door, and a heater core (heating heat exchanger) are arranged in order from the upstream blower side to the downstream outlet side in the air conditioning case, and the evaporator There is known a vehicle air conditioner in which a hot air passage that passes through the heater core, a cold air bypass passage that passes through the evaporator and bypasses the heater core, and an air mix chamber in which the hot air and the cold air merge are formed. (For example, see Patent Documents 1 and 2).

Conventionally, in order to store heat after the engine coolant has enough heat to store and store heat, it is in the middle of the engine coolant circuit that connects the heater core disposed inside the air conditioning case and the cooling water channel of the water-cooled engine. 2. Description of the Related Art There is known a vehicle air conditioner provided with a heat storage device in which a heat storage material is set at a position and provided with a bypass cooling water channel that bypasses the heat storage device (see, for example, Patent Document 3).
JP 2003-237344 A JP 2000-108636 A Japanese Patent Laid-Open No. 10-86645

  However, in the conventional vehicle air conditioners described in Patent Documents 1 and 2, the cool air that has passed through the evaporator is warmed by the heater core to be warm air, and passes through the hot air passage and blows out from the outlet. For example, when the engine is stopped due to idling stop or the like when full hot, the heater core is cooled by the cold air that has passed through the evaporator, and the blowing temperature is reduced in a short time. There was a problem that would decrease.

  Further, in the conventional vehicle air conditioner described in Patent Document 3, a heat storage circuit and a heat storage device are provided separately from the engine cooling water circuit (warm water circuit), and the pump and the electromagnetic valve are stopped when the engine is stopped. The heat storage device's hot water is sent to the heater core to dissipate heat, so the structure is complex, requires a large space, increases costs, and part of the latent heat stored by the piping path is lost. There was a problem that.

  The present invention has been made by paying attention to the above-mentioned problems, and minimizes space occupation and achieves cost reduction with a simple structure, while providing heat resistance to the heat exchanger without giving air blowing resistance during air conditioning operation. An object of the present invention is to provide a vehicle air conditioner that can supplement heating or cooling of a vehicle interior for a predetermined time by effectively using latent heat after the supply of an exchange medium is stopped.

In order to achieve the above object, in the present invention, a cooling heat exchanger, an air mix door, and a heating heat exchanger are arranged in order from the upstream blower side to the downstream outlet side in the air conditioning case, A hot air passage that passes through the cooling heat exchanger and the heating heat exchanger, a cold air bypass passage that passes through the cooling heat exchanger and bypasses the heating heat exchanger, and hot air and cold air In an air conditioning apparatus for a vehicle in which an air mix chamber that merges is formed,
Among the cooling heat exchanger and the heating heat exchanger, on the case wall surface forming the downstream side passage of at least one heat exchanger, a heat storage sheet is set by arrangement along the flow of the wind,
The heat storage sheet includes a latent heat storage material that stores heat by latent heat released or absorbed with a phase change between a solid phase and a liquid phase.

Therefore, in the vehicle air conditioner of the present invention, the wind flows on the case wall surface that forms the downstream side passage of at least one of the cooling heat exchanger and the heating heat exchanger. A heat storage sheet containing a latent heat storage material that stores heat (“thermal heat storage” and “cold heat storage”) by latent heat released or absorbed with a phase change between the solid and liquid phases is set. The
That is, since the heat storage sheet is not provided with a heat storage circuit and a heat storage device as in the prior art, for example, the heat storage sheet can be set while using the existing heat exchanger on the inner wall of the existing air conditioning case. In addition, space occupancy can be minimized, and a simple structure can reduce costs.
Moreover, even if the heat storage sheet is additionally set in the air conditioning case by setting the heat storage sheet along the wind flow on the case wall surface, an increase in the air blowing resistance during the air conditioning operation is suppressed to a low level.
For example, when a heat exchange medium is supplied to a heating heat exchanger, the latent heat storage material contained in the heat storage sheet absorbs the thermal energy (latent heat) absorbed with the phase change from the solid phase to the liquid phase. After the supply of the heat exchange medium to the heat exchanger is stopped, heat is supplied to the wind passing through the surface of the heat storage sheet by releasing it with a phase change from the liquid phase to the solid phase, and the supply of the heat exchange medium After stopping, heating in the passenger compartment is supplemented for a predetermined time.
For example, when a heat exchange medium is supplied to a cooling heat exchanger, the latent heat storage material contained in the heat storage sheet releases the thermal energy (latent heat) released with a phase change from the liquid phase to the solid phase. After the supply of heat exchange medium to the heat exchanger is stopped, heat is taken from the wind passing through the surface of the heat storage sheet by absorbing the phase change from the solid phase to the liquid phase, and the heat exchange medium is supplied. After stopping, the cooling of the passenger compartment is supplemented for a predetermined time.
As a result, space occupation is minimized and the cost is reduced by a simple structure, and after the supply of heat exchange media to the heat exchanger is stopped without giving air blowing resistance during air conditioning operation, latent heat is reduced. It can be effectively used to supplement heating and cooling in the passenger compartment for a predetermined time.

  Hereinafter, the best mode for realizing a vehicle air conditioner of the present invention will be described based on Example 1 and Example 2 shown in the drawings.

  First, the configuration will be described.

  FIG. 1 is a longitudinal sectional view showing an air conditioning unit 1A (an example of a vehicle air conditioner) that adjusts the temperature of the front and rear seats of the first embodiment, and FIG. 2 is a diagram for the first heating set in the air conditioning unit 1A of the first embodiment. It is a figure which shows the thermal storage sheet | seat 18, (a) shows the perspective view of the thermal storage sheet | seat 18 for 1st warmth, (b) shows the detailed perspective view of the thermal storage sheet | seat 18 for 1st thermals.

  As shown in FIG. 1, the air conditioning unit 1A in the first embodiment includes an air conditioning case 2, a blower 3, a clean filter 4, an evaporator 5 (cooling heat exchanger), an air mix door 6, and a heater core 7 (heating). Heat exchanger), hot air passage 8, cold air bypass passage 9, air mix chamber 10, vent door 11, differential door 12, foot door 13, vent outlet 14, differential outlet 15 and foot. A blowout port 16 and a rear foot blowout port 17 are provided.

  In the air conditioning unit 1A according to the first embodiment, an evaporator 5, an air mix door 6, and a heater core 7 are arranged in the air conditioning case 2 in order from the upstream blower 3 side to the downstream outlets 14, 15, 16, and 17 side. ing.

  The evaporator 5 is a heat exchanger that cools the inside air or the outside air passing through the blower 3 and the clean filter 4, and has a refrigerant inlet 5a and a refrigerant outlet 5b.

  The air mix door 6 is arranged at the downstream position of the evaporator 5 and controls the mixing ratio of the cold air that has passed through the evaporator 5 and the warm air that has passed through the heater core 7 by the door opening. As this air mix door 6, from the full hot position (the position shown by the solid line in FIG. 1) where the cold air bypass passage 9 is closed to the position where the upstream side of the heater core 7 is closed (the full cool position shown by the phantom line in FIG. 1). The sliding door is slidable in the stroke range.

  The heater core 7 is a heat exchanger that is disposed at a downstream position of the evaporator 5 and the air mix door 6 and warms the passing air, and includes an engine cooling water inlet 7a and an engine cooling water outlet 7b.

  As shown in FIG. 1, the air conditioning case 2 includes a hot air passage 8 that passes through the evaporator 5 and the heater core 7, a cold air bypass passage 9 that passes through the evaporator 5 and bypasses the heater core 7, and a hot air passage 8. And the air mix chamber 10 in which the cool air from the cool air bypass passage 9 merges is formed.

On the downstream side of the air mix chamber 10, the vent door 11 is disposed at the position of the vent outlet 14 and is opened in the vent mode, the differential door 12 is disposed at the position of the differential outlet 15 and is opened in the differential mode, and the vehicle width. A foot door 13 that is disposed upstream of the foot outlets 16 and 16 extending in the direction and opens in a foot mode or the like is disposed.
The foot outlets 16 and 16 are arranged in pairs toward the feet of the driver and passenger on the left and right of the front seat. A rear foot outlet 17 to which the rear foot duct is connected is disposed.

A first heat storage sheet 18 (heat storage sheet) is set on the wall surface of the case forming the wake-side passage of the heater core 7 in accordance with the wind flow.
In the first embodiment, as shown in FIG. 1, the air conditioning case 2 has a case inner wall surface 2 a set at a position facing the heat exchange surface of the heater core 7 through a space, and the case inner wall surface 2 a from the heater core 7. The hot air passage 8 is formed to change the direction upward when the hot air is applied. And the 1st thermal storage sheet 18 is set over the wide area | region extended in the downstream from the opposing area | region whole surface facing a heat exchange surface among the case inner wall surfaces facing the heat exchange surface of the heater core 7. FIG.

  The first thermal storage sheet 18 absorbs a phase change from a solid phase to a liquid phase among latent heat storage materials that store heat by latent heat released or absorbed with a solid phase / liquid phase change. Latent heat storage that performs “thermal storage” that releases the heat energy (latent heat) to the heater core 7 after the supply of engine cooling water (heat exchange medium) to the heater core 7 is stopped with a phase change from the liquid phase to the solid phase. It contains a material.

The configuration of the first thermal storage sheet 18 will be described in detail. A paraffin-encapsulated capsule in which a paraffin-based material is encapsulated in a spherical film to form a microcapsule is used as a latent heat storage material, as shown in FIG. A non-woven fabric having a corrugated cross-section in which concave and convex surfaces are continuous along the wind flow direction is used as the sheet base material, and the paraffin-encapsulated capsule is captured on the sheet base material. In other words, the first thermal storage sheet 18 for the triangular heat is configured by folding the nonwoven fabric capturing the paraffin-encapsulated capsules in a triangular waveform.
Here, the reason for using a paraffinic material as the latent heat storage material is that when setting the phase change temperature depending on the melting point (melting temperature) or freezing point (freezing temperature), a wide temperature range (- 50 ° C. to 80 ° C.), and the amount of stored heat (melting latent heat) is about 130 to 250 kJ / kg, which is higher than other materials.

Moreover, the phase change temperature of the liquid phase / solid phase of the paraffin-encapsulated capsule is set to 50 ° C. to 70 ° C.
For example, in the case of the air conditioning unit 1A that circulates engine cooling water to the heater core 7 as in the first embodiment, the phase change temperature is preferably about 50 ° C. to 60 ° C. or higher. The reason for this is that the engine cooling water temperature may be less than 80 ° C in winter, etc., and the blowing temperature felt to be warm is 30 ° C. Therefore, the phase change temperature required to obtain the blowing temperature of 30 ° C or higher is As described above, the temperature is about 50 ° C. to 60 ° C. or higher (50 ° C. to 70 ° C.).

  Next, the operation will be described.

  In the air conditioning unit 1 </ b> A according to the first embodiment, as shown in FIG. 1, the heat exchange surface of the heater core 7 is opposed to the heat transfer surface of the heater core 7 out of the case wall surface that forms the downstream side passage of the heater core 7. A first heat storage sheet for latent heat containing a latent heat storage material that performs "thermal storage" by latent heat released or absorbed with a phase change of the solid phase / liquid phase at the case wall position along the flow of the wind 18 is set. Hereinafter, the [cost reduction action] and the [complementary action for vehicle interior heating] will be described.

[Low cost action]
For example, a conventional vehicle air conditioner described in Japanese Patent Application Laid-Open No. 10-86645 pays attention to the fact that a heat exchange medium circulated through a heater core is heated by latent heat, and an engine cooling water circuit (hot water circuit) and Separately, a heat storage circuit and a heat storage device are provided, and when starting in a cold region or when the engine is stopped, the hot water of the heat storage device is sent to the heater core to radiate heat using a pump and a solenoid valve. For this reason, it is necessary to additionally set a heat storage circuit and a heat storage device in the engine coolant circuit, the structure becomes complicated, and a large occupied space is required, resulting in an increase in cost. Moreover, a part of latent heat stored in the heat storage device is lost through the piping path.

  On the other hand, in the air conditioning unit 1A of the first embodiment, paying attention to the fact that the blast in the air conditioning case 2 from the position immediately after the heater core 7 to the outlet is heated by latent heat, the downstream side passage of the heater core 7 is formed. The structure which sets the heat storage sheet | seat 18 for 1st heat containing the latent heat storage material in the case wall surface was employ | adopted. Thus, since the heating target by latent heat is not the heat exchange medium but the air itself flowing in the case, there is no need to provide a heat storage circuit and a heat storage device as in the prior art.

  Therefore, as shown in FIG. 1, the space occupation can be minimized so that the first thermal storage sheet 18 can be set while using the existing evaporator 5 and the heater core 7 in the existing air conditioning case 2. In addition, the cost can be reduced by a simple structure.

  In addition, as shown in FIG. 2 (a), the first thermal storage sheet 18 is set on the case wall according to the flow of the wind, so that the first thermal storage sheet 18 is provided in the air conditioning case 2. Even if 18 is additionally set, the increase in blowing resistance during the air conditioning operation can be kept low.

[Complementary heating of vehicle interior heating]
For example, assuming an air conditioning unit in which the first heat storage sheet 18 for heat is not set, the circulation of the engine cooling water in the heater core is stopped due to the stop of the circulation pump at the time of idling stop for temporarily stopping the engine. Therefore, the heat energy (sensible heat) that is stored in the engine coolant in the heater core is the residual heat energy when the engine is stopped, but the engine core is deprived of the residual heat of the heater core by the cold air that has passed through the evaporator. The heat energy for sensible heat is consumed within a short time from the time of the stop, and the blowing temperature rapidly decreases immediately after the engine stops. By the way, when there is no thermal storage sheet, as shown in the dotted line characteristics of FIG. 3, the blowing temperature suddenly decreases immediately after the engine is stopped, and the blowing temperature that was 70 ° C. in about 30 seconds decreases to 30 ° C. End up.

  On the other hand, in the case of the air conditioning unit 1 </ b> A of the first embodiment, the first thermal storage sheet 18 is set at the position of the inner wall surface of the case facing the heat exchange surface of the heater core 7. For this reason, at the time of idling stop for temporarily stopping the engine, the thermal energy (sensible heat) stored in the engine coolant in the heater core 7 due to the stop of the circulation pump is shortly after the engine is stopped. To consume. However, when engine cooling water is supplied to the heater core 7, the paraffin in the paraffin-encapsulated capsule contained in the first thermal storage sheet 18 generates thermal energy (latent heat) with a phase change from the solid phase to the liquid phase. Absorb. Then, after the supply of engine cooling water to the heater core 7 is stopped, the paraffin in the paraffin-encapsulated capsule releases latent heat with a phase change from the liquid phase to the solid phase, whereby the first thermal storage sheet 18 is heated. Heat is applied to the wind passing through the surface. For this reason, the heating of the passenger compartment can be supplemented for a predetermined time after the supply of engine cooling water is stopped. For example, as shown in FIG. 1, when the foot door 13 is opened, it is possible to continue sending warm air to the foot positions of the front seat left and right and rear seat passengers.

  Here, “sensible heat” is the thermal energy stored in a normal solid or liquid without phase change, while “latent heat” is the phase between the liquid and solid that causes water to become ice. It refers to the thermal energy released or absorbed with changes. In general, by using latent heat, it is possible to store an amount of heat that is orders of magnitude greater than in the case of sensible heat. For example, in the case of water, the sensible heat at 1 ° C. is 4.18 J / g, whereas the latent heat when 0 ° C. water freezes to 0 ° C. ice reaches 334 J / g.

  Therefore, in the case of Example 1 in which the first thermal storage sheet 18 is set, as shown by the solid line characteristics in FIG. 3, the blowing temperature decreases from immediately after the engine is stopped to the phase change temperature, but the phase change temperature (freezing point). After reaching the value, the lowering of the blowing temperature is suppressed by the latent heat stored in the paraffin-filled capsule. By the way, when the first thermal storage sheet 18 is set, the hatched area between the solid line characteristic and the dotted line characteristic in FIG. 3 shows the latent heat effect, and the blowing temperature that was 70 ° C. when the engine is stopped decreases to 30 ° C. It takes about 2 minutes to complete. In other words, after the engine is stopped, the vehicle interior heating can be supplemented only for 2 minutes.

Next, the effect will be described.
In the air conditioning unit 1A of the first embodiment, the effects listed below can be obtained.

  (1) In the air conditioning case 2, an evaporator 5, an air mix door 6, and a heater core 7 are arranged in this order from the upstream blower 3 side to the downstream outlets 14, 15, 16, 17 side. An air conditioning unit in which a hot air passage 8 that passes through the heater core 7, a cold air bypass passage 9 that passes through the evaporator 5 and bypasses the heater core 7, and an air mix chamber 10 in which the hot air and the cold air merge together are formed. 1A, in the evaporator 5 and the heater core 7, a heat storage sheet is set on the case wall surface forming the downstream side passage of at least one heat exchanger according to the flow of wind, and the heat storage sheet is Contains a latent heat storage material that stores heat by latent heat released or absorbed with a phase change between the solid and liquid phases, minimizing space occupancy While reducing the cost with a simple structure, without supplying air resistance during air-conditioning operation, the supply of heat exchange medium to the heat exchanger is stopped, and then latent heat is used effectively for a predetermined time. It is possible to supplement indoor heating and cooling.

  (2) The heat storage sheet is a paraffin-encapsulated capsule in which a paraffinic material is encapsulated in a spherical coating and is used as a latent heat storage material, so that the volatility of paraffin can be suppressed by microencapsulation. The phase change temperature can be set with a high degree of freedom from a wide temperature range corresponding to the number of carbon atoms.

  (3) The heat storage sheet is configured by using a nonwoven fabric having a corrugated cross-section in which a concave surface and a convex surface are continuous along a wind flow direction as a sheet base material, and capturing the paraffin-encapsulated capsule in the sheet base material. As a result, it is possible to secure a large heat collection area and heat radiation area in the heat storage sheet, and by adopting a non-woven fabric, it absorbs noise and vibration generated in the air-conditioning case 2 with a high capturing effect of the paraffin-encapsulated capsule. The sound vibration absorption effect can be demonstrated.

  (4) The heat storage sheet is a first heat storage sheet 18 containing a latent heat storage material for storing heat, and the liquid phase / solid phase change temperature of the latent heat storage material is set to 50 ° C. to 70 ° C. Since the temperature is set to 0 ° C., the air supply temperature at which the occupant feels warm is ensured, and after the supply of engine cooling water to the heater core 7 is stopped, the latent heat is effectively used to supplement the heating of the vehicle interior for a predetermined time. Can do.

  (5) The air conditioning case 2 has a case inner wall surface 2a set at a position facing the heat exchange surface of the heater core 7 through a space, and hot air from the heater core 7 hits the case inner wall surface 2a upward. The warm air passage 8 that changes the direction is formed, and the first thermal storage sheet 18 is set over at least the entire area of the facing region facing the heat exchange surface among the inner wall surfaces of the case facing the heat exchange surface of the heater core 7. The absorption of thermal energy accompanied by the phase change from the solid phase to the liquid phase and the release of thermal energy accompanied by the phase change from the liquid phase to the solid phase correspond to the change in the temperature immediately after the highly responsive heater core 7. Can be done effectively.

  The second embodiment is an example in which a second heat storage sheet 19 is additionally set in the air mix door 6 in the first heat storage sheet 18.

First, the configuration will be described.
FIG. 4 is a longitudinal sectional view showing an air conditioning unit 1B (an example of a vehicle air conditioner) that adjusts the temperature of the front and rear seats of the second embodiment.

  As shown in FIG. 4, the air conditioning unit 1B of the second embodiment includes an air conditioning case 2, a blower 3, a clean filter 4, an evaporator 5, an air mix door 6, a heater core 7, a hot air passage 8, and cold air. Bypass passage 9, air mix chamber 10, vent door 11, differential door 12, foot door 13, vent outlet 14, differential outlet 15, foot outlet 16, rear foot outlet 17, and first heat Heat storage sheet 18 and second heat storage sheet 19 for heat.

  As shown in FIG. 4, the air mix door 6 is a door that closes the cold air bypass passage 9 at the time of full hot, and is a heat storage sheet for heat set on the case inner wall surface 2 a facing the heat exchange surface of the heater core 7. Is the first thermal storage sheet 18, the second thermal storage sheet 19 is set on the surface of the air mix door 6 that is exposed to the warm air passage 8 during full hot. In addition, the 2nd thermal storage sheet 19 shall contain a latent-heat thermal storage material similarly to the 1st thermal storage sheet 18.

  The air mix door 6 is a sliding door that slides over the cold air bypass passage 9 and the upstream side of the heater core 7, and the door main body 6 a of the sliding air mix door 6 and the second thermal storage sheet 19 for heating. An air heat insulating layer 6b (heat insulating layer) is interposed therebetween. Since other configurations are the same as those in the first embodiment, the same reference numerals are given to the corresponding configurations, and descriptions thereof are omitted.

Next, the operation will be described.
For example, at the time of full hot when the cold air bypass passage 9 is closed by the air mix door 6, warm air is blown on the back side of the air mix door 6 (air mix chamber 10 side). On the other hand, on the door front side (the evaporator 5 side) that separates the plate of the air mix door 6, the cold air before heating that has passed through the evaporator 5 flows, so heat exchange is performed via the air mix door 6. It will be. That is, the inventor has found through experiments that heat exchange through the single air mix door 6 is one of the factors that cause the temperature of the hot air flowing through the air mix chamber 10 to decrease during full hot. did.

On the other hand, in the case of the air conditioning unit 1B of the second embodiment, the first heat storage sheet 18 is set at a position facing the heat exchange surface of the heater core 7 and the front and back surfaces of the air mix door 6 are fully hot. A second thermal storage sheet 19 was set on the surface exposed to the hot air passage 8. For this reason, when full hot is selected and the engine is temporarily stopped, the heat exchange surface of the heater core 7 is changed by combining the sensible heat action and the latent heat action as in the case of the first embodiment. When the wind passes through the surface of the first thermal storage sheet 18 for heat, heat is given to the passing wind. When the warm air passes through the back surface of the air mix door 6, heat exchange through the air mix door 6 is suppressed by the air heat insulating layer 6b, and the wind passes through the surface of the second heat storage sheet 19 for warm heat. In doing so, heat is applied to the passing wind.
Accordingly, when the hot water is selected, warm hot air with a temperature drop suppressed until the passage of a longer duration than the duration of the first embodiment after the supply of engine cooling water is stopped. And the supplementary action of the vehicle interior heating that leads to the rear foot outlet 17 is achieved.
As a result, for example, as shown in FIG. 4, when the foot mode with the foot door 13 opened is selected and the engine is temporarily stopped by an idle stop or the like, Hot air can continue to be sent to the foot position. Since other operations are the same as those of the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the air conditioning unit 1B of the second embodiment, in addition to the effects (1) to (5) of the first embodiment, the following effects can be obtained.

  (6) The air mix door 6 is a door that closes the cold air bypass passage 9 when full hot, and the heat storage sheet for heat set on the case inner wall 2a facing the heat exchange surface of the heater core 7 is the first heat. When the heat storage sheet 18 is used, since the second heat storage sheet 19 is set on the surface exposed to the warm air passage 8 at the time of full hot, of the front and back surfaces of the air mix door 6, when full hot is selected, After stopping the supply of engine cooling water, the heat exchange when warm air passes through the air mix door 6 is absorbed by the latent heat of the second heat storage sheet 19 to achieve a complementary effect of heating the interior of the vehicle with reduced temperature drop. can do.

  (7) The air mix door 6 is a sliding door that slides over the cold air bypass passage 9 and the upstream side of the heater core 7, and the door main body 6a of the sliding air mix door 6 and the second heat storage. Since the air heat insulating layer 6b (heat insulating layer) is interposed between the sheet 19 and the hot air when the hot air passes through the air mix door 6 after the supply of the engine cooling water is stopped, the hot air is selected. Compared to the case where only the first thermal storage sheet 18 is set using the latent heat effect of the first thermal storage sheet 18 and the second thermal storage sheet 19 by suppressing the exchange by the air heat insulating layer 6b. The complementary action can be continued for a longer time.

  As mentioned above, although the vehicle air conditioner of this invention has been demonstrated based on Example 1 and Example 2, it is not restricted to these Examples about a concrete structure, Each claim of a claim Design changes and additions are permitted without departing from the spirit of the invention according to the paragraph.

In the first embodiment, the position of the inner wall surface of the case facing the heater core, and in the second embodiment, the position of the inner wall surface of the case facing the heater core and the position of the door surface of the air mix door that forms the inner wall surface of the case when fully hot are stored. An example of setting a sheet was shown.
However, it is good also as an example which sets not only the setting of the heat storage sheet | seat for warmth but the heat storage sheet | seat for cold storage by arrangement | positioning along the flow of a wind on the case wall surface which forms the downstream flow path of the evaporator which is a heat exchanger. This heat storage sheet for cold heat shall contain the latent heat storage material which set the phase change temperature of the liquid phase and the solid phase to 2 to 7 degreeC, for example. In this case, when the full cool is selected, the cooling of the passenger compartment can be supplemented for a predetermined time after the supply of the refrigerant (heat exchange medium) to the evaporator 5 is stopped.
In short, a heat storage sheet is set by arranging along the flow of the wind on the case wall surface that forms the downstream side passage of at least one of the heat exchanger for cooling and the heat exchanger for heating. Are included in the present invention.

  In Examples 1 and 2, as a latent heat storage material that stores heat by latent heat released or absorbed with a phase change between a solid phase and a liquid phase, paraffin obtained by encapsulating a paraffinic material inside a spherical coating and microencapsulating Although an example using an encapsulated capsule has been shown, the latent heat storage material is not limited to paraffinic materials. For example, polyethylene glycol (for thermal storage), inorganic salt / hydrate / aqueous solution (thermal storage, cold storage) ), Hydrate slurry (cold heat storage limited) or the like encapsulated or packaged can be used.

  In the first and second embodiments, the application example to the air conditioning unit that adjusts the temperature of the front and rear seats is shown. However, the air conditioning unit that adjusts the temperature only to the front seat and the temperature adjustment of the front seat side and the rear seat side are performed independently. It can also be applied to an air conditioning unit.

It is a longitudinal cross-sectional view which shows 1 A of air conditioning units (an example of a vehicle air conditioner) which adjusts temperature to the front and rear seats of Example 1. FIG. It is a figure which shows the 1st thermal storage sheet 18 set to the air-conditioning unit 1A of Example 1, (a) shows the perspective view of the 1st thermal storage sheet 18, (b) shows the 1st thermal storage sheet. 18 shows a detailed perspective view of FIG. It is a figure which shows the comparison of the blowing temperature characteristic after the engine stop without the heat storage sheet in the air conditioning unit 1A of Example 1 and the blowing temperature characteristic after the engine stop with the heat storage sheet. It is a longitudinal cross-sectional view which shows the air conditioning unit 1B (an example of a vehicle air conditioning apparatus) which adjusts temperature to the front and rear seats of Example 2. FIG.

Explanation of symbols

1A, 1B Air conditioning unit 2 Air conditioning case 3 Blower 4 Clean filter 5 Evaporator (cooling heat exchanger)
6 Air mix door 6a Door body 6b Air insulation layer 7 Heater core (heat exchanger for heating)
8 Hot Air Passage 9 Cold Air Bypass Passage 10 Air Mix Chamber 11 Vent Door 12 Differential Door 13 Foot Door 14 Vent Outlet 15 Differential Outlet 16 Foot Outlet 17 Rear Foot Outlet 18 First Heat Storage Sheet (Heat Storage Sheet)
19 Second thermal storage sheet (heat storage sheet)

Claims (7)

In the air conditioning case, a cooling heat exchanger, an air mixing door, and a heating heat exchanger are arranged in order from the upstream blower side to the downstream outlet side, and the cooling heat exchanger and the heating heat are arranged. A hot air passage that passes through the exchanger, a cold air bypass passage that passes through the cooling heat exchanger and bypasses the heating heat exchanger, and an air mix chamber in which the hot air and the cold air merge are formed. In a vehicle air conditioner,
Among the cooling heat exchanger and the heating heat exchanger, on the case wall surface forming the downstream side passage of at least one heat exchanger, a heat storage sheet is set by arrangement along the flow of the wind,
The vehicle air conditioning apparatus, wherein the heat storage sheet includes a latent heat storage material that stores heat by latent heat released or absorbed with a phase change between a solid phase and a liquid phase. The vehicle air conditioner according to claim 1,
The heat storage sheet is a vehicle air conditioner characterized in that a paraffin-encapsulated capsule in which a paraffinic material is encapsulated in a spherical coating is used as a latent heat storage material. The vehicle air conditioner according to claim 1 or 2,
The heat storage sheet is configured to use a non-woven fabric having a corrugated cross section in which a concave surface and a convex surface are continuous along a wind flow direction as a sheet base material, and capture a paraffin-encapsulated capsule in the sheet base material. Air conditioner. The vehicle air conditioner according to any one of claims 1 to 3,
The heat storage sheet is a heat storage sheet for heat containing a latent heat storage material for storing heat, and the phase change temperature of the liquid phase / solid phase of the latent heat storage material is set to 50 ° C to 70 ° C. A vehicle air conditioner. The vehicle air conditioner according to claim 4,
The air conditioning case has a case inner wall surface set at a position facing the heat exchange surface of the heating heat exchanger via a space, and the case inner wall surface is heated by hot air from the heating heat exchanger. Forming a warm air passage that changes direction,
The vehicle air conditioner is characterized in that the heat storage sheet for warm heat is set over at least the entire area of the facing region facing the heat exchange surface among the inner wall surface of the case facing the heat exchange surface of the heat exchanger for heating. The vehicle air conditioner according to claim 5,
The air mix door is a door that closes the cold air bypass passage when full hot,
When the heat storage sheet for heating set on the inner wall surface of the case opposite to the heat exchange surface of the heat exchanger for heating is referred to as the first heat storage sheet, the hot air passage in the front and rear surfaces of the air mix door during full hot A vehicle air conditioner characterized in that a second thermal storage sheet is set on the exposed surface. The vehicle air conditioner according to claim 6,
The air mix door is a sliding door that slides over the cold air bypass passage and the upstream side of the heating heat exchanger,
An air conditioner for a vehicle, wherein a heat insulating layer is interposed between a door body of the slide type air mix door and the second heat storage sheet.

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