JP3465400B2 - Cool storage air conditioning system for vehicle parking - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative air conditioner for parking a vehicle which can cool the inside of the vehicle during parking without requiring a refrigeration cycle operation.

[0002]

2. Description of the Related Art A cab (vehicle compartment) of a truck (vehicle) that travels a long distance has a rest room with a bed on the rear side (cargo side). This break room is for the driver to take a break.When using it, park the truck at a place such as a parking lot, then move the driver from the driver's seat to the rear break room and lay it on the bed. Just touch
I am able to take a nap in the bed and rest my body.

By the way, when the temperature is high such as in the summer, during this break, the engine of the truck is left idle and the compressor of the air conditioner (composed of a refrigeration cycle) mounted on the truck is driven. It is often the case that the cooling operation is continued as it is before the break.

However, such a cooling operation during a break is
With considerable fuel consumption. Moreover, at night, the operation of the engine causes noise. Therefore, conventionally, actual Kaihei 4-10
As disclosed in Japanese Patent No. 1707, a passage for accommodating the regenerator material is provided along the wall surface of the entire wall of the vehicle compartment, and cool air from a ventilator mounted on a truck is guided to the passage. Therefore, a technology has been proposed in which cold air is stored in the cold storage material. This technique stores cold air in the regenerator material by utilizing the operation of the ventilator, and releases the stored cool air from the regenerator material after the operation of the ventilator.

[0005]

[Problems to be Solved by the Invention] By the way, in order to secure good habitability, the vehicle cabin and the rest room of the truck are
It is desirable to be as wide as possible. However, the structure in which the lead-out passage is provided along the wall surface of the vehicle compartment narrows the space inside the vehicle compartment including the break room.

[0006] Moreover, there is a problem that a considerable amount of labor is required when installing the cold storage equipment. The present invention has been made in view of the above circumstances, and an object of the present invention is to cool a passenger compartment with cold storage with a cool storage facility that does not impair the habitability of the passenger compartment as much as possible and that is easily attached. It is intended to provide a regenerative air conditioner for parking a vehicle.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a structure in which a weather strip is used in a window opening of a passenger compartment instead of a windshield, and The cold storage panel unit and the heat exchanger are accommodated in the cold storage panel unit, and the cold storage panel unit having the flange portion on the outer peripheral portion and the cold air opening opened and closed by the opening / closing lid is mounted on the wall portion facing the vehicle interior. The heat storage device employs a cold storage structure in which a refrigerant pipe is used to guide the condensed refrigerant of the refrigeration cycle, which is already installed in the vehicle, to the heat exchanger via a pressure reducing device.

In addition to the above-mentioned object, the invention according to claim 2 utilizes the window opening on the rear side of the rest room which occupies a larger area, without impairing the habitability of the limited rest room. In order to effectively cool the person in the break room, the cool storage panel unit according to claim 1 is attached to a window opening formed on the rear side of the break room forming a part of the vehicle compartment. It is in.

In addition to the above-mentioned object, the invention according to claim 3 further enables the cool storage panel portion to store cold in a running state in which the load on the engine is small, An on-off valve is provided in the path of the refrigerant pipe described.

In addition to the above object, the invention as set forth in claim 4 is the dew condensation water on the surface of the cold storage panel portion and the surface of the heat exchanger, which is generated during cold storage of the cold storage panel portion and during cooling of the cold storage panel portion. In order to prevent the trouble such as inadvertently wetting the cold storage panel, the cool storage panel unit according to claim 1 or 2 is provided with a drain pan for collecting condensed water from the cool storage panel portion and the heat exchanger. There is something.

According to a fifth aspect of the invention, in addition to the above object, in order to further reduce the thickness of the cold storage panel unit,
As the cool storage panel portion according to claim 1, claim 2, claim 3, or claim 4, a structure in which a cool storage material is contained in a hollow panel formed in a thin box shape is adopted.

[0012]

According to the invention described in claim 1, while the vehicle is traveling, the refrigerating cycle is utilized to cool the cold storage panel portion of the cold storage panel unit by the heat exchanger that evaporates. After that, for example, when the traveling is interrupted to take a break, the engine is stopped and the vehicle is parked, and then the open / close lid is operated to the open side to open the cold air port.

Then, the latent heat stored in the cool storage panel portion from the cool air port becomes cool air and is discharged into the vehicle compartment. This cold air cools the vehicle interior with the engine stopped.

The cool storage panel unit for performing such cooling has a structure in which a weather strip is used and installed in the window opening of the passenger compartment instead of the windshield. In other words, the cool storage panel unit can be installed in the same way as the window glass by sharing the window opening as it is, unlike building a passage structure that occupies a large living space in the vehicle compartment. It becomes possible to install it with the comfortability as little as possible.

This is also because the path for supplying the latent heat required for cold storage is a refrigerant pipe which does not require a large passage area for guiding cold air. Moreover, most of the installation of the cool storage panel unit can be done by the same work as when installing the window glass, so the installation work will be simple.

According to the second aspect of the invention, the rest room is cooled by the cool storage panel unit mounted in the window opening on the rear side, as described above. Here, a person such as a driver taking a break usually rests near a part of the break room near the rear window opening, so the rear window opening, which occupies a large area, can be used effectively. As a result, it is possible to effectively cool the person in the rest room without impairing the habitability of the limited rest room and fully utilizing the characteristics of the descending cool air.

According to the third aspect of the present invention, when the vehicle is in a traveling state in which the load of the air conditioning load during the day is large, the on-off valve is not closed to perform the cold storage operation, for example, the air conditioning load from night to early morning is light. When the vehicle is in a running state where the vehicle is in a running state, the on-off valve is opened and the refrigerant from the condenser is guided to the heat exchanger to be evaporated and stored in the cold storage panel section.

In other words, it becomes possible to store the cold energy in the cold energy storage panel section when the engine is running with a light load, without unnecessarily reducing the capacity of the refrigeration cycle or imposing an excessive load on the engine. .

According to the invention described in claim 4, the drain pan receives the condensed water on the surface of the cold storage panel portion and the heat exchanger caused by the temperature difference between the cold storage panel portion during cold storage and cooling, and the ambient temperature. Are collected.

This prevents the condensed water from flowing out of the cold storage panel unit and inadvertently wetting each part in the vehicle interior. According to the fifth aspect of the present invention, the size of the window opening portion can be utilized to secure a large cold storage capacity in spite of being thin, so that the cold storage panel unit can be made thin.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in FIGS. FIG. 1 shows the front side of a cab over truck (vehicle) to which the present invention is applied. In the figure, 1 is a frame extending in the front-rear direction, 2 is a running engine installed on the front side of the frame 1, 3 Is a tilt type cab installed on the frame 1 so as to cover the engine 2.

A driver's seat 5 and a passenger's seat (not shown) are provided on the front side of a passenger compartment 4 constituted by the cab 3. A break room 7 in which a bed 6 is placed is formed on the rear side of the passenger compartment 4 with the driver's seat 5 and the passenger seat as a boundary. The person there is lying in bed 6 so that they can rest.

In the rear view window opening 8 formed in the rear wall 3a of the cab 3, a window glass 9 (shown in FIGS. 5 to 7) attached to the window opening 8 is used instead. A cold storage panel unit 10 that constitutes a cold storage air conditioner for parking is installed on the entire opening of the window opening 8.

The structure of the cold storage panel unit 10 is shown in FIG.
And shown in FIG. This cool storage panel unit 1
0 has a two-body structure in which a main body portion 10a facing the outside of the vehicle compartment and a cover portion 10b facing the vehicle interior are combined.

Describing the structure of the main body 10a, reference numeral 11 is a back plate composed of a heat insulating member. The back plate 11 has a rectangular shape corresponding to the size of the window glass 9, and a flange portion 13 is formed over the entire circumference at the outer peripheral end.

The back plate 11 has a weather strip 14 for supporting the window glass 9 with the flange portion 13.
In FIG. 5 to FIG. 7, the window opening 8 is mounted so as to be closed by being supported by the edge of the window opening 8. The weather strip 14 is used to seal between the outer peripheral edge of the back plate 11 and the opening edge of the window opening 8.

On the inner surface of the back plate 11 (side surface on the vehicle compartment side), a cool storage panel portion 15 and a heat exchanger 20 which are components necessary for cool storage are assembled. Specifically, the cool storage panel unit 15 accommodates a cool storage material 17 mainly composed of, for example, a carbohydrate in a hollow panel 16 (radiation panel) formed by assembling a member having excellent thermal conductivity, for example, an aluminum plate into a thin box shape. I will do it. The outer shape of the hollow panel 16 is set to a rectangular size corresponding to the opening of the window opening 7, and the leg portions 16 a project from the outer peripheral portion of the hollow panel 16 toward the back plate 11. There is.

The tip ends of these leg portions 16a are bolted to the inner surface of the back plate 11 so that the entire cool storage panel portion 15 is covered by the back plate 1.
It is fixed in a direction facing the inner surface of 1. Then, by using this fixing structure, the heat exchanger 20 functioning as an evaporator in the gap between the side portion of the hollow panel 16 and the inner surface of the back plate 11.
Is assembled.

That is, the heat exchanger 20 is constructed by making the heat exchange pipe 20a meander in a U shape. The heat exchange pipe 20a is formed on the inner surface of the back plate 11.
Is formed so that each part of the heat exchange pipe 20a is sandwiched by both the side part of the hollow panel 16 and the recess 11a formed on the inner surface of the back plate 11.
By accommodating between the hollow panel 16 and the back plate 11, the whole heat exchanger 20 is installed between the hollow panel 16 and the back plate 11.

A drain pan 21 is provided immediately below the cold storage panel portion 15 and the heat exchanger 20 of the back plate 11 along the width direction of the panel portion 15, the surface of the cold storage panel portion 15 and the heat exchanger 20. It has a structure that collects the condensed water dripping from the surface of the.

In the embodiment, the back plate 11 is provided between the main body 11 and the window opening 8 in order to secure high support rigidity.
Bracket 1 so as to bridge over the inner surface portion on the outer peripheral side of the inner panel portion 8a constituting the frame of the window opening 8
It is connected with 8.

On the other hand, the cover portion 10b is in the shape of a box having a heat insulating property, which has a rectangular shape that covers the entire cool storage panel portion 15 including the inner panel portion 8a around the window opening 8 from the passenger compartment 4 side. It is composed of a cover 19.

The front wall of the cover 19 is screwed to the tip of a bracket 21 projecting from the passenger compartment 4 side to the front of the hollow panel 16, and is screwed to the end of the peripheral wall of the cover 18. The seal member 24 provided is brought into close contact with the surface of the trim member 25 that covers the inner panel portion 8a. Then, the cover 19 and the back plate 11 combine to form the cover 19, the inner panel portion 8a, and the back plate 11. The enclosed portion, that is, the entire interior of the cool storage panel unit 10 is hermetically sealed. That is, the entire interior of the cool storage panel unit 10 is used as the cool air chamber 26.

In the lower part of the front wall of the cover 19, a plurality of elongated cold air outlets 23 which are opened and closed by a laterally extending manual louver 27 (opening / closing lid) are provided.
The cool air can be discharged to the outside from the lower side.

The heat exchanger 20 of the cold storage panel unit 10 is connected to the refrigeration cycle 30 for air conditioning mounted on the truck. That is, the refrigerating cycle 30 for air conditioning is driven by the engine 2 as shown in FIG. 1, and the compressor 3 having an electromagnetic clutch (not shown) built therein.
1, a condenser 32 provided in front of the radiator 2a of the engine 2, an expansion valve 33 (decompression device), and an evaporator 36 of a cooling unit 35 provided in the instrument panel 34 are connected to the refrigerant pipe 30a. When the compressor 31 is driven by the engine 2, the refrigerating cycle operation in which the filled refrigerant is condensed in the condenser 32 outside the vehicle compartment and evaporated in the evaporator 36 in the vehicle compartment is performed. It has become.

The outlet side of the evaporator 36 and the inlet side of the expansion valve 33 (the outlet side of the condenser 32) are connected to the cold storage panel unit 1
The heat exchanger 20 of 0 is connected in parallel via a bypass pipe 37. A capillary tube 38 (pressure reducing device) is provided in the bypass pipe 37 connected to the inlet side of the heat exchanger 20 so that the heat exchanger 20 acts as an evaporator.

With the bypass refrigerant circuit thus constructed, the engine-driven refrigeration cycle 30 can be used to store heat in the regenerator material 17 using the heat exchanger 20.

An electromagnetic opening / closing valve 39 (corresponding to an opening / closing valve) is provided on the inlet side of the capillary tube 38, and the electromagnetic refrigerant opening / closing valve 39 is used to flow the condensed refrigerant from the condenser 32 to the heat exchanger 20. Controllable.

The electromagnetic on-off valve 39 is connected to a control unit (for example, a microcomputer and its peripheral circuits) 40 together with refrigeration cycle components (compressor 31, expansion valve 33, etc.).

Further, the control unit 40 is connected to an operation panel 41 for setting the cooling / heating operation and for turning on / off the cold storage operation. In addition to the function of controlling the refrigeration cycle constituent devices according to the cooling / heating mode information from the operation panel 41, the control unit 40 also includes the refrigeration cycle constituent devices and the electromagnetic opening / closing valve 39 so as to establish the heat storage mode according to the on / off information of the cold storage mode. The function to control is set. A function of closing the electromagnetic on-off valve 39 when the engine 2 is stopped is also set.

Next, the operation of the cold storage type air conditioner for parking configured as described above will be described. When the cold storage type air conditioner for parking is used, the cold storage material 17 is made to store cold by using the refrigeration cycle 30 while the truck that is cooling is running.

In this case, since the cooling of the passenger compartment 4 is not impaired, during the daytime when the air-conditioning load is large, the cool storage material 17 is not allowed to store heat, and for example, the air-conditioning load from night to early morning is light. The cool storage material 17 is made to store cold when it is in a running state.

Specifically, while the truck is running at midnight, the cold storage port 23 is closed and the operation panel 41 is operated to turn on the cold storage mode. At this time, since the cooling operation has already been performed, the electromagnetic opening / closing valve 3 is instructed by a command from the control unit 40.
Only 9 is opened.

As a result, part of the condensed refrigerant discharged from the condenser 32 of the refrigeration cycle 30 operating with the engine 2 as a drive source is bypass pipe 37 and capillary tube 3.
8 is led to the heat exchanger 20 of the cold storage panel unit 10 to exchange heat with the air in the cold air chamber 26 and evaporate. After the heat exchange, the refrigerant returns to the compressor 31.

As a result, the air in the cool air chamber 26 is cooled. At this time, the hollow panel 16 is also cooled. Then, the cold storage material 17 is cooled and the latent heat storage is started. At this time, the dew condensation water that condenses on the surfaces of the heat exchanger 20 and the hollow panel 16 flows downward, drops from the lower ends of the heat exchanger 20 and the hollow panel 16, and is collected in the drain pan 21.

While the truck is running, such a cold storage operation continues, and the cool storage material 17 stores the amount of heat necessary for the cool storage air conditioning. When the cooling operation is not performed, if the cold storage mode is turned on, the electromagnetic clutch (not shown) of the compressor 31 is turned on, the expansion valve 33 is closed, and the electromagnetic opening / closing valve 3 is turned on.
9 is opened, and the operation of the cold storage mode in which the refrigerant circulates in the heat exchanger 20 is started.

After that, the driver interrupts the traveling and takes a break in the break room 7. At this time, the driver parks the truck at a predetermined place to stop the operation of the engine 2 and then moves to the rest room 7 on the rear side.
As shown in (b), each louver 27 of the cold storage panel unit 10 is rotated downward to open each cold air outlet 23, and then, lie on the bed 6 and rest the body.

Then, the latent heat stored in the regenerator material 17 is
It becomes cold air by heat exchange, and from each cold air outlet 23 to the break room 7
It is released inside. During this cooling, the hollow panel 16
Condensed water on the surface of the drain pan 2
Collect in 1.

With this cool air, the inside of the vehicle compartment 4 can be cooled while the engine 2 is stopped (the cooling operation by the refrigeration cycle 30 is stopped) during parking. Moreover, since the cold storage panel unit 10 for cooling is structured to be installed in the window opening 8 on the rear side of the cab 3 by using the weather strip 14, instead of the windshield 9, the rest room 7
It is possible to suppress a decrease in habitability of the vehicle interior 4 including the.

To explain this alternative installation point, a window glass 9 is usually attached to the window opening 8 on the rear side of the cab 3 by a weather strip 14 as shown in FIGS. 5 and 6. It is what

When mounting the cool storage panel unit 10 in place of the window glass 9, first, as shown in FIG. 7, the weather strip 14 and the window glass 9 are removed from the window opening 8.

Then, using the same weather strip as the weather strip 14, the main body portion 10a is attached to the window opening 8 by the same operation as that of attaching the windshield 9.

After that, the bracket 18 is attached from the vehicle compartment 4 side to increase the mounting rigidity of the main body 10a, and then the cover 19 is screwed from the vehicle compartment 4 side to the hollow panel 16 protruding into the vehicle compartment 4. , The main body 10 so that the cold air chamber 26 is formed.
When assembled in a, the cool storage panel unit 10 is installed in the entire window opening 8 as shown in FIGS.

Therefore, the cold storage panel unit 10 is
Unlike the conventional construction of a separate passage structure that occupies a large living space in the passenger compartment, the window opening 8 can be used as it is for the installation portion and can be installed in the same manner as the window glass 9.

From this, the cold storage panel unit 10 can be installed in the vehicle compartment 4 so as not to impair the habitability as much as possible. This is also because the route for supplying latent heat required for cold storage is the refrigerant pipe 30a which does not require a large passage area for guiding cold air.

Furthermore, most of the mounting of the cool storage panel unit 10 can be performed by the same work as when mounting the window glass 9, so that the mounting work is also simple. In addition, when the body 10a and the cover 10b have a two-body structure, the trim member 25 around the window opening 8 is utilized to secure a large cold air chamber 26.

Moreover, in the structure in which the cold storage panel unit 10 is mounted in the window opening 8 formed on the rear side of the break room 7, the rear window opening 8 occupying a large area is effectively utilized, Without limiting the habitability of the limited rest room 7, the characteristics of the descending cold air can be fully utilized to effectively cool the surroundings of the driver who is resting in a portion close to the window opening 8.

In other words, the person in the break room 7 can be effectively cooled. This is because the driver or the like who rests in the rest room 7 is usually located near the rear window opening 8.

Further, when the electromagnetic opening / closing valve 39 is provided in the path of the refrigerant pipe 30a, the cold storage material 17 can be made to store cold when the engine 2 is in a running state with a small load, and the capacity of the refrigeration cycle 30 is carelessly set. It will not be necessary to lower the pressure or place an excessive load on the engine 2.

Further, the cold storage panel section 15 and the heat exchanger 20
By providing the drain pan 30 for collecting the condensed water from the vehicle, it is possible to collect the condensed water caused by the temperature difference between the cool storage and the surroundings, so that the condensed water flows out of the cool storage panel unit, It is possible to prevent troubles such as inadvertently wetting each part in the chamber 4.

In addition, if the structure in which the cold storage material 17 is housed in the hollow panel 16 formed in the shape of a thin box is adopted as the cold storage panel portion 15, the window opening portion 8 can be utilized for its size.
Although it is thin, a large cold storage capacity can be secured, and the cold storage panel unit 10 can be made thin.

In the embodiment, the capillary tube and the electromagnetic on-off valve are installed outside the cold storage panel unit, but not limited to this, these devices may be built in the cold storage panel unit. Although the present invention is applied to the cab over truck, it goes without saying that the present invention is not limited to this and can be applied to other vehicles.

[0063]

As described above, according to the invention as set forth in claim 1, the interior of the vehicle can be cooled by the cold storage with the simple installation of the cold storage equipment without impairing the habitability of the vehicle interior as much as possible. .

According to the second aspect of the present invention, in addition to the above-mentioned effect, the window opening on the rear side of the rest room occupying a large area is utilized, and the habitability of the limited rest room is not impaired. Moreover, the person in the break room can be effectively cooled.

According to the invention as set forth in claim 3, in addition to the above-mentioned effects, when the engine is in a running state in which the load is light, the cool storage panel portion can be made to store cold, and the capacity of the refrigeration cycle is lowered carelessly. , It is possible to prevent the engine from being overloaded.

According to the invention described in claim 4, in addition to the above effects, the condensed water on the surface of the cold storage panel portion and the surface of the heat exchanger generated during cold storage and cooling of the cold storage panel portion causes It is possible to prevent troubles such as inadvertently wetting each part.

According to the invention described in claim 5, in addition to the above effects, the size of the window opening can be utilized to secure a large cold storage capacity in spite of being thin, and the cold storage panel unit can be made thin. Can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a cold-storage parking air conditioner mounted on a vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a rest room as seen from the direction of arrow A in FIG.

FIG. 3 is a rear perspective view of a cab to which a cool storage panel unit is attached.

FIG. 4A is a cross-sectional view taken along line BB in FIG. 3, showing a configuration of a cold storage panel unit mounted in a window opening together with a state where a cold air outlet is closed. FIG. 6B is a sectional view showing a state in which the cold air opening is also opened.

FIG. 5 is a perspective view of a cab in which a window glass is attached to a rear window opening before the cool storage panel unit is attached, viewed from the rear.

6 is a cross-sectional view taken along line C-C in FIG. 5 around the window glass attached to the window opening.

FIG. 7 is a perspective view for explaining that the cool storage panel unit is attached to the rear window opening instead of the windshield.

[Explanation of symbols]

2 ... engine 3 ... cab
4 ... Car room 6 ... Bed 7 ... Rest room
8 ... Window opening 9 ... Wind glass 10 ... Cool storage panel unit 1
0a ... main body part 10b ... cover part 13 ... flange part 14
… Weather strip 16… Hollow panel 17… Regenerator
20 ... Heat exchanger 21 ... Drain pan 22 ... Louver
23 ... Cold air opening 26 ... Cold air chamber 30 ... Refrigeration cycle
31 ... Compressor 32 ... Condenser 33, 38 ... Expansion valve, capillary tube (pressure reducing device) 36 ... Evaporator 37 ... Bypass pipe
39 ... Electromagnetic on-off valve 40 ... Control part 41 ... Operation panel.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-249524 (JP, A) JP-A-62-149509 (JP, A) Actually open HEI 2-85977 (JP, U) Actually open 58- 148524 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60H 1/00-3/06

Claims (5)

(57) [Claims] 1. A regenerator panel mounted inside a window opening of a vehicle compartment, accommodates a regenerator panel together with a heat exchanger, has a flange portion on an outer peripheral portion, and further has an opening / closing lid on a wall portion facing the vehicle compartment. A cold storage panel unit that has a cold air opening that is opened and closed by a window strip and is supported by a weather strip instead of a window glass, and a condensed refrigerant of a refrigeration cycle mounted on a vehicle through a pressure reducing device. And a refrigerant pipe that guides the heat to the heat exchanger. 2. The cold storage type for parking of a vehicle according to claim 1, wherein the cold storage panel unit is mounted in a window opening on a rear side of a break room forming a part of the vehicle compartment. Air conditioner. 3. A cold storage air conditioner for parking a vehicle according to claim 1, wherein an on-off valve is provided in the path of the refrigerant pipe. 4. The vehicle parking according to claim 1, wherein the cold storage panel unit is provided with a drain pan for collecting condensed water from the cold storage panel portion and the heat exchanger. Regenerative air conditioner. 5. The regenerator panel section comprises a regenerator material housed in a hollow panel formed in a thin box shape, claim 1, claim 2, claim 3 or claim 4. A regenerative air conditioner for parking a vehicle according to item 1.