JPH04218424A - Car airconditioner - Google Patents

Abstract

PURPOSE:To cool inside of a car cabin quickly or complement the drop of the instant warming/cooling performance of an airconditioner for a car by utilizing the engine coolant having a large thermal capacity. CONSTITUTION:In normal cooling mode or warming mode, the coldness or heat of an engine coolant is accumulated by an accumulation tank 14 installed in a heat exchanger 4. In instant cooling mode or warming mode, the engine coolant whose coldness or heat is accumulated by the tank 14 is circulated through a coolant circuit 5 and returned to the heat exchanger 4, and at the time of passage through a plurality of tubes, the air in a duct 2 is cooled or heated. Moreover, current is fed to a Peltier element 28 to cool or heat the air in the duct 2 directly, and the instant cooling or warming effect in the car cabin is enhanced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle in which a heat exchanger incorporating a heat storage tank or a cold storage tank is disposed in a ventilation duct.

0002

[Prior Art] Conventionally, for example, Japanese Patent Application Laid-Open No. 61-1716
In Publication No. 05 and Japanese Unexamined Patent Publication No. 1988-193914, engine cooling water stored in heat or cold in a heat insulation tank or heat storage tank placed outside the ventilation duct is used downstream of the refrigerant evaporator in the ventilation duct. A vehicle air conditioner has been proposed that performs rapid heating or cooling of a vehicle interior by supplying air into a tube of a heater core disposed on the side and exchanging heat with air passing through a ventilation duct.

0003

[Problems to be Solved by the Invention] However, since the conventional technology uses only engine cooling water with a large heat capacity as a heat medium, for example, the piping from the heat insulation tank or heat storage tank to the tube of the heater core is long. If the heat retention capacity of the heat retention tank or the heat storage tank is weak, there is a problem in that the immediate effectiveness of rapid heating or cooling of the vehicle interior is reduced.

[0004] The present invention is an apparatus for rapidly heating or rapidly cooling a vehicle interior using engine cooling water having a large heat capacity, which is capable of compensating for a decrease in the immediate effectiveness of rapid heating or cooling of a vehicle interior. The purpose is to provide air conditioning equipment for

[0005]

[Means for Solving the Problems] [Claim 1] The present invention provides a ventilation duct for sending air toward a vehicle interior;
A plurality of tubes that exchange heat between the air passing through the ventilation duct and the engine cooling water, a heat storage tank connected in parallel to these tubes and storing heat of the engine cooling water that has flowed into the inside, and a heat storage tank connected in parallel to the plurality of tubes. a heat exchanger disposed in the ventilation duct and having a plurality of Peltier elements that heat the air passing through the ventilation duct when energized, and an engine that flows out from the heat exchanger. A cooling water circuit having a first path for returning cooling water to the heat exchanger through the engine, and a second path for returning engine cooling water flowing out of the heat exchanger to the heat exchanger through bypass piping that bypasses the engine. a pump that generates a water flow in the second path; a switching device that switches between the first path and the second path; a normal heating mode that controls the switching device to switch to the first path; A technical means is adopted, which includes a control means for activating the pump, energizing the plurality of Peltier elements, and controlling the switching means to set the rapid heating mode to switch to the second path.

[Claim 2] The present invention includes: a ventilation duct for sending air toward a vehicle interior; a cooling means disposed within the ventilation duct for cooling the air passing through the ventilation duct; A plurality of tubes that exchange heat between the air passing through the ventilation duct and the engine cooling water, a cold storage tank that is connected in parallel to these tubes and stores the engine cooling water that has flowed into the inside, and a cold storage tank that is connected in parallel to the plurality of tubes and that stores coolant of the engine cooling water that has flowed into the inside. a heat exchanger disposed downstream of the cooling means in the ventilation duct; A first path for returning engine cooling water flowing out from the exchanger to the heat exchanger through the engine, and a second path for returning engine cooling water flowing out from the heat exchanger to the heat exchanger through bypass piping that bypasses the engine. a cooling water circuit having a passage, a pump for generating a water flow in the second passage, a switching means for switching between the first passage and the second passage, and operating the cooling means and the pump, and a pump for generating a water flow in the second passage; A normal cooling mode in which the cooling means and the pump are operated, the plurality of Peltier elements are energized, and the switching means is controlled to switch to the second path. Adopted technical means with control means to set the cooling mode.

[0007]

[Operation] [Claim 1] (Normal heating mode) When the control means controls the switching means to switch the cooling water circuit to the first path, the engine cooling water heated by the engine is placed in the ventilation duct. It flows into the tubes of a heat exchanger or into a heat storage tank. Therefore, the air passing through the ventilation duct is heated by the engine cooling water passing through the plurality of tubes, and then is sent into the vehicle interior to heat the vehicle interior. On the other hand, the engine cooling water that has passed through the plurality of tubes flows into the engine after flowing out from the heat exchanger. Then, the engine cooling water that has been warmed again by the engine flows into the plurality of tubes or the heat storage tank again. As a result, the high temperature engine cooling water is stored in the heat storage tank.

(Rapid Heating Mode) When the plurality of Peltier elements are energized by the control means, the air passing through the ventilation duct is directly heated by the plurality of Peltier elements. Further, when the control means operates the pump and controls the switching means to switch the cooling water circuit to the second path, engine cooling water is circulated in the second path by the pumping force of the pump. Therefore, the high-temperature engine cooling water whose heat has been stored in the heat storage tank during the normal heating mode flows out of the heat storage tank and out of the heat exchanger. The high-temperature engine cooling water flowing out of the heat exchanger flows into the plurality of tubes or the heat storage tank through the bypass pipe without being returned to the engine. Therefore, the air passing through the ventilation duct is also heated by the high temperature engine cooling water passing through the plurality of tubes. As a result, the air heated by the plurality of Peltier elements is sent into the vehicle interior, thereby rapidly heating the vehicle interior.

[Claim 2] (Normal cooling mode)
When the cooling means is operated by the control means, the air passing through the ventilation duct is cooled by the cooling means and then sent to the heat exchanger. Furthermore, the control means operates the pump and controls the switching means to switch the cooling water circuit to the second one.
When switching to the route, engine cooling water pumped by the pump flows into a plurality of tubes of a heat exchanger arranged in a ventilation duct or into a cold storage tank. For this reason,
The air cooled by the cooling means cools the engine cooling water passing through the plurality of tubes, and then is sent into the vehicle interior to cool the vehicle interior. On the other hand, the engine cooling water cooled in multiple tubes flows out from the heat exchanger and
It passes through bypass piping that bypasses the engine, and then flows into multiple tubes or a cold storage tank again. As a result,
Low-temperature engine cooling water is stored in the cold storage tank.

(Rapid cooling mode) When a plurality of Peltier elements are energized by the control means, air passing through the ventilation duct is directly cooled by the plurality of Peltier elements. Further, the control means operates the cooling means and the pump, and controls the switching means to switch the cooling water circuit to the second path. Then, the low-temperature engine cooling water that has been stored in the cold storage heat tank during the normal cooling mode flows out of the heat exchanger due to the pump's pumping force. Then, the low-temperature engine cooling water flowing out of the heat exchanger flows into the plurality of tubes or the cold storage tank through bypass piping that bypasses the engine. Therefore, the air passing through the ventilation duct is also cooled by the low-temperature engine cooling water passing through the plurality of tubes. As a result, the air cooled by the plurality of Peltier elements is sent into the vehicle interior, thereby rapidly cooling the interior of the vehicle.

[0011]

Effects of the Invention [Claim 1] The present invention provides a device for rapid heating using engine cooling water with a large heat capacity by directly heating air passing through a ventilation duct using a plurality of Peltier elements. It can compensate for the decrease in the immediate effect of rapid heating. As a result, the rapid heating effect in the vehicle interior can be improved compared to the conventional technology.

[Claim 2] The present invention provides a rapid cooling system for a device that performs rapid heating using engine cooling water with a large heat capacity by directly cooling air passing through a ventilation duct with a plurality of Peltier elements. can compensate for the decrease in immediate effect. As a result, compared to conventional technology,
It is possible to improve the rapid cooling effect in the vehicle interior.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle air conditioner according to the present invention will be explained based on an embodiment shown in FIGS. 1 to 5. FIG. 1 is a schematic diagram showing the structure of the main parts of an automotive air conditioning system, and FIG. 2 is a schematic diagram showing the overall structure of the automotive air conditioning system.

This automotive air conditioning system 1 is an air conditioner for a vehicle according to the present invention, and includes a ventilation duct 2, a refrigeration cycle 3, a heat exchanger 4, a cooling water circuit 5, and a control circuit 6.

The ventilation duct 2 sends conditioned air into the passenger compartment of the automobile, and houses a blower 7 on its upstream side. When energized, the blower 7 generates an air flow toward the vehicle interior within the ventilation duct 2.

The refrigeration cycle 3 includes a refrigerant compressor (not shown), a refrigerant condenser (not shown), a pressure reducing device (not shown),
This is a well-known structure consisting of a refrigerant evaporator 8 and the like. The refrigerant evaporator 8 is a cooling means of the present invention, and when an electromagnetic clutch (not shown) is energized, a refrigerant compressor is rotationally driven by an engine 9, and the refrigerant flowing into the refrigerant and the air passing therethrough are generated. The air is cooled by exchanging heat with the air.

As shown in FIG. 3, the heat exchanger 4 includes a heat exchange unit 10, an inlet tank 11, an outlet tank 12,
It has an intermediate tank 13 and two cold storage heat tanks 14,
It is arranged downstream of the refrigerant evaporator 8 in the ventilation duct 2 . Note that the heat exchange unit 10 includes a plurality of outgoing tubes 1.
5, it is composed of a plurality of return tubes 16, a plurality of corrugated fins 17, two heat transfer plates 18, and two sets of Peltier units 19.

The inlet side tank 11 is connected to one of the cold storage heat tanks 14 and the upper ends of the plurality of outgoing tubes 15 in the drawing. This inlet side tank 11 transfers the engine cooling water that has flowed in from the cooling water circuit 5 to one cold storage heat tank 14.
and flows out into a plurality of outgoing tubes 15.

The outlet tank 12 is connected to the other cold storage heat tank 14 and the upper ends of the plurality of return tubes 16 in the drawing. This outlet side tank 12 allows the engine cooling water that has flowed in from the other cold storage heat tank 14 and the plurality of return tubes 16 to flow out to the cooling water circuit 5 .

[0020] The intermediate tank 13 is one of the cold storage heat tanks 1.
4 and the plurality of outgoing tubes 15 and the other cold storage heat tank 14 and the plurality of return tubes 16 are connected to the illustrated lower ends. This intermediate tank 13 allows the engine cooling water that has flowed in from one cold storage heat tank 14 and the plurality of outbound tubes 15 to flow out to the other cold storage heat tank 14 and the plurality of return tubes 16 .

The two cold storage heat tanks 14 are arranged in parallel outside the plurality of outgoing tubes 15 and the plurality of return tubes 16, and are connected in parallel to the plurality of outgoing tubes 15 and the plurality of return tubes 16. . These cold storage heat tanks 14 have a structure in which a heat insulating material (not shown) is sandwiched between two metal or water-resistant resin plates (not shown), thereby insulating the inside and the outside. . One cold storage heat tank 14 is connected between the inlet side tank 11 and the intermediate tank 13, and stores the engine cooling water that has flowed into the tank while maintaining the temperature of the engine cooling water. The other cold storage heat tank 14 is connected between the intermediate tank 13 and the outlet side tank 12, and stores the engine cooling water that has flowed into the tank while maintaining the temperature of the engine cooling water. The inlet tank 11, the outlet tank 12, the intermediate tank 13, the two cold storage heat tanks 14, and the two Peltier units 19 are surrounded by a plurality of heat insulating materials 20 that insulate the outside and the inside.

The plurality of outgoing tubes 15 communicate the inlet side tank 11 and the intermediate tank 13, and the plurality of return tubes 16 communicate the intermediate tank 13 and the outlet side tank 12. These going tubes 15 and return tubes 16
are arranged in parallel and exchange heat between the air passing through the ventilation duct 2 and the engine cooling water flowing inside. Also,
Multiple outbound tubes 15 and multiple return tubes 16
Both ends of the tank are joined to the inlet tank 11, the outlet tank 12, and the intermediate tank 13 by brazing or the like via a partition plate 21, respectively. On the partition plate 21,
The inlet side tank 1 is located opposite to the cold storage heat tank 14, the plurality of outgoing tubes 15, and the plurality of return tubes 16.
1. A communication hole 22 is formed to communicate the inside of the outlet side tank 12 and the intermediate tank 13 with the inside of the cold storage heat tank 14, the plurality of going tubes 15, and the plurality of return tubes 16.

A plurality of corrugated fins 17 are arranged between a plurality of outgoing tubes 15, a plurality of return tubes 16, and two heat exchanger plates 18, respectively. Moreover, these corrugated fins 17 are connected to a plurality of outgoing tubes 15.
, are joined to the plurality of return tubes 16 and two heat exchanger plates 18 by brazing or the like.

The two heat exchanger plates 18 are formed by a large number of leaf spring pieces 23.
is cut outwards. These heat transfer plates 18 transfer the thermal energy of the two sets of Peltier units 19 to the air passing through the heat exchange unit 10.

[0025] The two Peltier units 19 have a plurality of P
A plurality of Peltier elements 28 are connected to a plurality of N-type semiconductors 24 and a plurality of N-type semiconductors 25 by a plurality of inner conductive plates (heat transfer portions) 26 and a plurality of outer conductive plates 27. These Peltier units 19 are configured such that when a current flows from the N-type semiconductor 25 toward the P-type semiconductor 24 via the inner conductive plate 26, that is, when the current flows in the first current direction, the inner conductive plate 26 The heat is absorbed by the outer conductive plate 27, and the same amount of heat is generated by the outer conductive plate 27. Conversely, when the current flows from the P-type semiconductor 24 to the N-type semiconductor 25 via the inner conductive plate 26, that is, when the current flows in the second current direction, heat is generated in the inner conductive plate 26. The heat is generated and absorbed by the outer conductive plate 27.

When these Peltier units 19 are assembled into the heat exchanger 4, as shown in FIG. , and is attached to the heat exchanger 4 by pushing it in the direction of the arrow shown in FIG. At this time, by inserting the Peltier unit 19 into the groove 29 while knocking down the plurality of leaf spring pieces 23 protruding from the heat exchanger plate 18 toward the groove 29, the elastic force of the leaf spring pieces 23 causes the heat exchanger plate 18 to The adhesion between the Peltier unit 19 and the inner conductive plate 26 is maintained at a high level.

The cooling water circuit 5 has a first path 30 and a second path 30.
The engine 9, the radiator 32, the thermostat 33, and the water pump 34 are connected in an annular manner, the engine 9, the three-way valve 35, the heat exchanger 4, and the water pump 34 are connected in an annular manner, and the auxiliary pump 36 and the heat The exchanger 4 is connected in a ring.

The first path 30 connects the engine 9 and the heat exchanger 4.
By connecting the heat exchanger 4 in an annular manner, the engine cooling water flowing out from the heat exchanger 4 is passed through the engine 9 and returned to the heat exchanger 4 again. The second path 31 bypasses engine cooling water flowing out from the heat exchanger 4 by connecting a bypass pipe 37 that bypasses the engine 9 (short-circuits the cooling water circuit 5) and the heat exchanger 4. This is a route that returns to the heat exchanger 4 again through the piping 37.

When the water pump 34 is rotationally driven by the engine 9, it circulates engine cooling water within the first path 30. The three-way valve 35 is a switching means of the present invention, and is opened and closed by an electromagnetic actuator 38 whose energization is controlled by the control circuit 6. This three-way valve 35 opens (
1), the route of the cooling water circuit 5 is switched to the first route 30. Further, when the three-way valve 35 is closed (switched to the side shown by the broken line in FIG. 1), the path of the cooling water circuit 5 is switched to the second path 31. The auxiliary pump 36 is a pump of the present invention, and is disposed in the bypass piping 37 and circulates engine cooling water within the second path 31 when energized.

The control circuit 6 controls the refrigeration cycle 3 in response to signals output from the cooling switch 39, manual switch 40, engine cooling water temperature sensor 41, outside temperature sensor 42, tank internal water temperature sensor 43, and outlet temperature sensor 44. Energizing the electromagnetic clutch, blower 7, multiple Peltier elements 28, auxiliary pump 36, and electromagnetic actuator 38 (
ON) and energization stop (OFF). The cooling switch 39 is a starting switch for normal cooling mode or rapid cooling mode. Manual switch 40 is a start switch for rapid heating mode. Engine coolant temperature sensor 4
1 detects the engine cooling water temperature in the engine 9. The outside temperature sensor 42 detects the air temperature outside the vehicle interior, that is, the outside temperature. Tank water temperature sensor 4
3 detects the engine cooling water temperature in the cold storage heat tank 14. The blowout temperature sensor 44 detects the temperature of the blowout air blown out from the refrigerant evaporator 8.

The control circuit 6 also closes the three-way valve 35 (turns off the electromagnetic actuator 38) during the normal cooling mode.
), turn on the auxiliary pump 36, and turn on the plurality of Peltier elements 2.
Turn 8 off. Furthermore, in the rapid cooling mode, the three-way valve 35 is closed, the auxiliary pump 36 is turned on, and the plurality of Peltier elements 28 are turned on (first energization direction). Furthermore, during normal heating, the three-way valve 35 is opened (the electromagnetic actuator 38 is turned on), the auxiliary pump 36 is turned off, and the plurality of Peltier elements 28 are turned off. In the rapid heating mode, the three-way valve 35 is closed, the auxiliary pump 36 is turned on, and the plurality of Peltier elements 28 are turned on (second energization direction).

FIG. 5 is an operation flowchart showing an example of the operation of the control circuit 6. First, after performing initial settings (step S1), the engine cooling water temperature in the engine 9 (
Twe), outside air temperature (Ta), engine cooling water temperature in the cold storage heat tank 14 (Twt), and temperature of the air blown out from the refrigerant evaporator 8 (Tao) are detected (step S
2). Then, it is determined whether the cooling switch 39 is turned on (step S3). Air conditioner switch 39 is O
When the answer is N (Yes), it is determined whether the three-way valve 35 is in a closed state (step S4). When the three-way valve 35 is not in the closed state (No), the normal heating mode is set (step S5).

In step S4, when the three-way valve 35 is in the closed state (Yes), the difference between the outlet air temperature (Tao) and the engine cooling water temperature (Twt) is a predetermined temperature (for example, 3
0° C.) (step S6). When (Tao-Twt)>30° C. (No), the normal cooling mode is set (step S7).

In step S6, (Tao-Twt
)>30° C. (Yes), the rapid cooling mode is set (step S8), and the control in step S6 is performed again.

In step S3, the cooling switch 39
is not turned on (No), the manual switch 40 is turned on.
It is determined whether or not it is FF (step S9). When the manual switch 40 is not turned off (No), it is determined whether the engine cooling water temperature (Twe) is lower than a predetermined water temperature (for example, 40° C.) (step S10). Twe<
When the temperature is not 40° C. (No), control in step S5 is performed.

[0036] In step S10, Twe<40°C
When this is the case (Yes), the rapid heating mode is set (step S11), and the control in step S10 is performed again.

In step S9, the manual switch 40
is turned off (Yes), it is determined whether the outside air temperature (Ta) is lower than a predetermined temperature (for example, 25° C.) (step S12). When Ta<25°C (Yes), control in step S10 is performed, and when Ta<25°C does not exist (N
o) At time, control is terminated.

The operation of this automotive air conditioning system 1 will be explained based on FIGS. 1 to 4.

(Operation in normal cooling mode) When the normal cooling mode is set, first, the electromagnetic clutch is energized and the refrigerant compressor is rotationally driven by the engine 9, and then the blower 7 is energized and the air flows into the ventilation duct 2. An airflow is generated towards the interior of the vehicle. Therefore, in the refrigerant evaporator 8,
The air flowing inside the ventilation duct 2 is cooled by heat exchange between the refrigerant flowing inside and the air flowing inside the ventilation duct 2. Furthermore, by energizing the electromagnetic actuator 38, the three-way valve 35 is closed and the cooling water circuit 5 is switched to the second
By switching to the path 31 and energizing the auxiliary pump 36, a circulating flow of engine cooling water is created in the second path 31 by the pumping force of the auxiliary pump 36, as shown by the solid line in FIG. Therefore, the engine cooling water in the bypass pipe 37 flows into the inlet side tank 11 of the heat exchanger 4 and then flows through the plurality of outgoing tubes 15, the intermediate tank 13, and the plurality of return tubes 16, and then flows into the outlet side tank 1.
2. Alternatively, one cold storage heat tank 14,
It flows into the outlet side tank 12 through the intermediate tank 13 and the other cold storage heat tank 14 . Therefore, the air cooled when passing through the refrigerant evaporator 8 is transferred to the heat exchange unit 1
0, the engine cooling water flowing through the plurality of outbound tubes 15 and the plurality of return tubes 16 is cooled. Thereafter, the air flowing out from the heat exchange unit 10 is sent into the vehicle interior, thereby cooling the vehicle interior.

On the other hand, the low-temperature engine cooling water cooled by the air blown out from the refrigerant evaporator 8 in the plurality of outgoing tubes 15 and the plurality of return tubes 16 is transferred from the outlet side tank 12 to the outside of the heat exchanger 4. After flowing out, the water passes through the bypass pipe 37 and returns to the inlet side tank 11 again. Then, the low-temperature engine cooling water flows into the plurality of outbound tubes 15 and the plurality of return tubes 16 again, and circulates in the second path 31 while being further cooled by air. Note that when the cooling operation in the normal cooling mode ends, the engine cooling water stored in the two cold storage heat tanks 14 is kept warm because these tanks are surrounded by the heat insulating material 20 in a U-shape. The temperature is maintained at a low temperature even when the outside temperature is extremely high. As a result, low-temperature engine cooling water is stored in the two cold storage heat tanks 14.

(Operation in rapid cooling mode) When the rapid cooling mode is set, as in the normal cooling mode, the operation shown in FIG.
As shown by the solid line, a circulating flow of engine cooling water is created in the second path 31. Furthermore, current in the first energizing direction is passed through the plurality of Peltier elements 28 of the two sets of Peltier units 19 . When a current is applied to the plurality of Peltier elements 28 in the first energizing direction, heat is absorbed by the inner conductive plate 24 . Therefore, the air passing through the heat exchange unit 10 via the heat transfer plate 18 is directly cooled by the plurality of Peltier elements 28. In addition, the low-temperature engine cooling water that was stored in the two cold storage heat tanks 14 during the normal cooling mode is transferred to the second cold storage heat tank 14.
When circulating through the path 31 and flowing from the inlet side tank 11 into the plurality of outgoing tubes 15 and the plurality of return tubes 16, the air is still at a high temperature even after passing through the refrigerant evaporator 8 in the early stage of cooling, for example. do. As a result, air cooled by the two sets of Peltier units 19 and the stored engine cooling water is sent into the vehicle interior, thereby rapidly cooling the interior of the vehicle.

(Operation in normal heating mode) When the normal heating mode is set, the electromagnetic actuator 38 is de-energized, the three-way valve 35 is opened, and the cooling water circuit 5 is switched to the first path 30. As a result, as shown by the broken line in FIG. 1, the high temperature engine cooling water heated by the engine 9 is circulated within the first path 30 by the pumping force of the water pump 34. Therefore, the high temperature engine cooling water flows into the inlet side tank 11 of the heat exchanger 4, flows through the plurality of outgoing tubes 15, the intermediate tank 13, and the plurality of return tubes 16, and flows into the outlet side tank 12. . Alternatively, it flows into the outlet side tank 12 through one cold storage heat tank 14, the intermediate tank 13, and the other cold storage heat tank 14. Therefore, when the cold air passing through the ventilation duct 2 flows into the heat exchange unit 10, it is heated by the high-temperature engine cooling water flowing through the plurality of outbound tubes 15 and the plurality of return tubes 16, and is heated to a high temperature. The atmosphere becomes. Then, after this high-temperature air flows out from the heat exchange unit 10, it is sent into the vehicle interior, thereby heating the vehicle interior.

On the other hand, the engine cooling water that has exchanged heat with the cold air in the plurality of outbound tubes 15 and the plurality of return tubes 16 flows out of the outlet side tank 12 to the outside of the heat exchanger 4 and is then recirculated by the engine 9. It is heated and becomes high-temperature engine cooling water. This high-temperature engine cooling water is transferred again from the inlet side tank 11 to the plurality of outbound tubes 1.
5 and into a plurality of return tubes 16 to heat the air again. Note that when the heating operation in the normal heating mode ends, the engine cooling water stored in the two cold storage heat tanks 14 is transferred to the heat insulating material 20.
Because it is surrounded by a wall, it retains heat and remains at a high temperature even when the outside temperature is very low. As a result, high temperature engine cooling water is stored in the two cold storage heat tanks 14.

(Operation in rapid heating mode) When the rapid heating mode is set, the three-way valve 35 closes and the cooling water circuit 5 is switched to the second path 31, as shown by the solid line in FIG. In addition, a circulating flow of engine cooling water is created in the second path 31. Moreover, two sets of Peltier units 1
A current in the second energization direction is passed through the plurality of Peltier elements 28 of 9. When a current is applied to the plurality of Peltier elements 28 in the second current direction, heat is generated in the inner conductive plate 24 . Therefore, the air passing through the heat exchange unit 10 via the heat transfer plate 18 can be directly heated by the plurality of Peltier elements 28. In addition, the high temperature engine cooling water that has been stored in the two cold storage heat tanks 14 during the normal heating mode is circulated in the second path 31 from the inlet side tank 11 into the plurality of outgoing tubes 15 and into the plurality of return tubes. 16, it heats air that is at a fairly low temperature, for example at the beginning of heating. As a result, the air heated by the two sets of Peltier units 19 and the stored engine cooling water is sent into the vehicle interior, thereby rapidly heating the vehicle interior.

As described above, this automotive air conditioning system 1
The system not only cools and heats the air passing through the heat exchange unit 10 by exchanging heat with the engine cooling water stored in cold storage and heat, but also cools and heats the air passing through the heat exchange unit 10.
can be cooled and heated by For this reason,
Compared to the conventional technology in which heat is exchanged only by cold storage and heat stored engine cooling water, even if the piping of the second path 31 of the cooling water circuit 5 is long, rapid cooling effect and rapid heating in the passenger compartment can be achieved. effect can be obtained.

Furthermore, by incorporating the cold storage heat tank 14 and the Peltier unit 19 into the heat exchanger 4 disposed within the ventilation duct 2, the size of the apparatus can be reduced. Furthermore, since it is only necessary to add an auxiliary pump 36 and bypass piping 37 to the cooling water circuit 5, the cooling water circuit 5 is much simpler than the conventional technology in which a heat insulation tank or heat storage tank placed outside the ventilation duct is added. It becomes a structure.

(Modification) In this embodiment, each tank is surrounded by a heat insulating material, but it is also possible to use a structure in which only a heat storage tank or a cold storage tank is surrounded by a heat insulating material. In this example, two Peltier units are installed in the heat exchanger.
Only one set was installed, but one or three Peltier units could be installed.
You may include more than one set. In this embodiment, a refrigerant evaporator of a refrigeration cycle is used as the cooling means, but a plurality of Peltier elements may be used. In this embodiment, an electric pump is used as the pump, but a hydraulic pump or the like may also be used. In this example, a three-way valve driven by an electromagnetic actuator was used as the switching means;
If it is possible to switch between routes, two or more three-way valves,
Switching means such as one or more electromagnetic on-off valves or one or more hydraulic three-way valves may also be used. In this embodiment, an automotive air conditioning system using the present invention was implemented, but a vehicle heating system using the invention of claim 1 or a vehicle cooling system using claim 2 may also be implemented.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of the main parts of an automotive air conditioning system according to the present invention.

FIG. 2 is a schematic diagram showing the overall structure of the automotive air conditioning system of the present invention.

FIG. 3 is a sectional view showing the structure of a main part of a heat exchanger incorporated in the automotive air conditioning system of the present invention.

FIG. 4 is an exploded view of the main parts of a heat exchanger incorporated in the automotive air conditioning system of the present invention.

FIG. 5 is an operation flowchart showing an example of the operation of the control circuit.

[Explanation of symbols]

1 Automotive air conditioning system (vehicle air conditioner) 2
Ventilation duct 4 Heat exchanger 5 Cooling water circuit 6 Control circuit (control means) 8 Refrigerant evaporator (cooling means) 9 Engine 14 Cold storage heat tank (thermal storage tank, cold storage tank) 15
Plurality of going tubes 16 Plurality of return tubes 28 Plurality of Peltier elements 30 First path 31 Second path 35 Three-way valve (switching means) 36 Auxiliary pump (pump) 37 Bypass piping

Claims (2)

[Claims] Claim 1: (a) a ventilation duct for sending air toward the vehicle interior; (b) a plurality of tubes for exchanging heat between the air passing through the ventilation duct and engine cooling water; A heat storage tank that is connected in parallel and stores heat of the engine cooling water that has flowed into the inside, and a plurality of Peltier elements that are arranged in parallel with the plurality of tubes and heat the air passing through the ventilation duct when energized. (c) a first path for returning engine cooling water flowing out of the heat exchanger to the heat exchanger through the engine; and a first path for returning engine cooling water from the heat exchanger to the heat exchanger; a cooling water circuit having a second path for returning outflow engine cooling water to the heat exchanger through bypass piping that bypasses the engine; (d) a pump that generates a water flow in the second path;
e) a switching means for switching between the first path and the second path; (f) a normal heating mode for controlling the switching means to switch to the first path; and activating the pump and controlling the plurality of Peltier elements. A vehicular air conditioner comprising: a control means for energizing and controlling the switching means to set a rapid heating mode to switch to the second path. (g) a ventilation duct for sending air toward the vehicle interior; (h) cooling means disposed within the ventilation duct to cool the air passing through the ventilation duct; ) A plurality of tubes that exchange heat between the air passing through the ventilation duct and the engine cooling water, a cold storage tank that is connected in parallel to these tubes and stores coolant of the engine cooling water that has flowed into the inside, and a plurality of tubes that a heat exchanger having a plurality of Peltier elements arranged in parallel and cooling air passing through the ventilation duct when energized, and arranged downstream of the cooling means in the ventilation duct; (j) a first path for returning the engine cooling water flowing out from the heat exchanger to the heat exchanger through the engine; and a bypass pipe for passing the engine cooling water flowing out from the heat exchanger and bypassing the engine to exchange the heat. a cooling water circuit having a second path returning the water to the container; (k) a pump generating a water flow in the second path;
l) switching means for switching between the first route and the second route; (m) a normal cooling mode for operating the cooling means and the pump and controlling the switching means to switch to the second route; A vehicle air conditioner comprising: a control means for operating the cooling means and the pump, energizing the plurality of Peltier elements, and controlling the switching means to set a rapid cooling mode to switch to the second path. .