JP3380584B2 - Automotive heating system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating system for a hot water vehicle for heating by utilizing the heat of engine cooling water.
In particular, the present invention relates to a heating device for an automobile in which a regenerator for storing heat of the cooling water is provided in a circulation path of the engine cooling water. 2. Description of the Related Art A heat storage device provided in a vehicle heating apparatus of this kind is provided with a heat storage agent in a container having a high heat insulating effect, and stores heat by passing cooling water through the container. When the temperature of the cooling water is higher than the temperature of the cooling agent, the heat storage agent deprives the heat of the cooling water and stores the heat. Conversely, when the temperature of the cooling water is lower, the cooling water is It can be warmed. By providing such a regenerator in the circulation path of the cooling water, even when the engine is completely cold, the cooling water can be heated using the heat stored in the regenerator, so that the engine warms up. Heating can be performed quickly without waiting for [0003] In recent years, various improvements have been made to a heating device for an automobile having such a heat storage device, but until now, how effective the heat of the heat storage device is for heating. The focus has been on whether to use it. For example, Japanese Unexamined Patent Publication No. 2-77315 discloses that in addition to a basic route for circulating cooling water between an engine, a regenerator, and a heat exchanger for heating (hereinafter sometimes referred to as a “heater core”), cooling It has been proposed to provide another path for circulating water between the regenerator and the heater core by bypassing the engine so that the heat stored in the regenerator can be more effectively used for heating. [0004] However, the heat stored by the regenerator cannot be used only for heating. This heat can also be used to warm up cold engines,
For example, if the heat stored in the heat accumulator can be actively used for warming up the engine when there is no demand for rapid heating, the heat stored in the heat accumulator can be more effectively utilized. However, although conventional heating devices for automobiles can efficiently use the heat stored in the regenerator for heating, the heat stored in the regenerator can be used positively for warming up the engine. And the heat stored in the regenerator could not be used more effectively. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heating apparatus for a vehicle which can more effectively utilize the heat stored in a heat storage device. [0006] In order to achieve the above object, the present invention comprises the above-described vehicle heating device as follows. That is, according to a first aspect of the present invention, there is provided a heating apparatus for a vehicle, comprising: a regenerator for storing heat of the cooling water in a circulation path of the cooling water for cooling the engine; A heating device for an automobile is provided which includes a heating heat exchanger for exchanging heat with the air . [0008] Then, the circulation path, the cooling water and the engine and the heat accumulator a first path for circulating between the heat exchanger, the heat exchanger the coolant the engine bypasses And a second circulating between the regenerator and
And a third path for circulating the cooling water between the engine and the regenerator by bypassing the heat exchanger with the heat exchanger. the cooling water when one of the switching path switching valve for performing circulation in which path is provided in the second path the cooling water when there are more fast warm request, also no Hayadan request of the path Are circulated in the third path, respectively.
And a switching control means for controlling said path switching valve so that. The switching control means circulates the cooling water through the second path when the temperature of the heat accumulator is higher than the temperature of the cooling water in the engine when there is a request for quick warming . Whether the heat storage temperature of the heat accumulator is higher than the temperature of the cooling water in the engine without a request for quick heating
When the engine is not operating, the cooling water is supplied through the third path and the heat storage temperature of the heat storage
Degree is higher than the temperature of the cooling water in the engine and
When the engine is running, the cooling water is
Control the path switching valve to circulate in each path
Characterized in that it is intended to. The temperature of the cooling water in the engine is not limited to the temperature of the cooling water in the water jacket of the engine, but is limited to the cooling water in the circulation path from the outlet of the water jacket to the inlet of the regenerator. This includes the temperature of water and the like. The heat storage temperature of the regenerator refers to a temperature that can be used as a criterion for determining whether or not the cooling water passed through the regenerator is heated. For example, the temperature of the regenerator in the regenerator and the temperature of the regenerator The temperature of the cooling water that comes out corresponds to this. The quick heating request is a request for rapidly heating the vehicle interior. The presence or absence of such a rapid warming request is determined by, for example, whether or not the occupant has turned on the rapid warming switch when the heating device is provided with a rapid heating switch (rapid warming switch). In the vehicle heating apparatus according to the first aspect of the present invention, the switching control means causes the cooling water to circulate through the second path when there is a rapid heating request. Control the switching valve. At this time, the cooling water circulates between the heat exchanger and the regenerator by bypassing the engine, so that the heat stored in the regenerator can be efficiently used for heating without being deprived by the engine. On the other hand, when there is no quick warming request, the switching control means controls the path switching valve so as to circulate the cooling water through the third path. At this time, the cooling water circulates between the engine and the regenerator, bypassing the heat exchanger, so that the heat stored in the regenerator can be efficiently used for warming up the engine without being deprived of the heat exchanger. Can be. As described above, the path for bypassing the engine and the path for bypassing the heat exchanger are provided so as to be selectable, and this path is selected according to the presence or absence of a rapid heating request. And for warming up the engine, respectively. Further , when there is a demand for quick heating and the heat storage temperature of the regenerator is higher than the temperature of the cooling water in the engine, the switching control means controls the path switching valve so as to circulate the cooling water through the second path. . On the other hand, when there is no quick warming request and the heat storage temperature of the heat accumulator is higher than the temperature of the cooling water in the engine,
As In the inoperative engine switch control means to circulate cooling water in the third path, also during operation of the engine
If so, the switching control means circulates the cooling water through the first path.
The path switching valves are controlled as described above. The heat storage temperature of the regenerator is generally considered to be higher than the temperature of the cooling water in the engine, but may be lower on the contrary. Heating or warming up the engine relying solely on the heat stored by the regenerator in such a state would not be suitable for those purposes or could not be achieved sufficiently. It is thought that there is. Therefore, depending on whether there is a request for quick warming, the conditions for determining whether or not the heat storage temperature of the heat storage unit is higher than the temperature of the cooling water in the engine and the air conditioner.
By taking into account the engine operating conditions , the heat stored in the regenerator can be used efficiently, and the objectives of rapid heating and engine warm-up can be sufficiently achieved. As described above, according to the automotive heating apparatus of the present invention, there is a demand for quick heating and the heat stored in the regenerator is sufficient.
When it is in a state where it can be used, the second route is selected and stored.
The heat stored by the heater is used effectively for heating, eliminating the need for quick heating
The heat stored in the heat storage device can be fully utilized,
Also selects the third route when the engine is not running
To effectively use the heat stored by the regenerator to warm up the engine.
And select the general first route in other cases
By doing so, the heat stored in the regenerator can be efficiently and reliably utilized.
Therefore, the heat storage of the heat storage device can be efficiently used for heating and for warming up the engine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a vehicle heating apparatus according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a vehicle heating apparatus according to one embodiment of the present invention. As shown in FIG. 1, in the circulation path C ₀ of the engine cooling water for cooling the engine E,
A regenerator B for storing heat of the cooling water heated by the engine E, a heat exchanger (heater core) H for heating for exchanging heat of the cooling water to heat of the air, and a circulation path C ₀ when the engine is not operating. And a water pump P for circulating the cooling water. Temperature sensor 2a in the engine E for detecting the temperature T _E of the cooling water in the water jacket of the engine E
However, a temperature sensor 2b for detecting the heat storage temperature TB in the heat accumulator _B is installed in the heat accumulator _B.
The detection signals X _E and X _B of 2a and 2b are input to the switching control means 4. Moreover, so that the outside air temperature sensor 3 which detects the outside air temperature is provided, the detection signal X _G in the outside air temperature sensor 3 is also inputted to the switching control unit 4. The circulation path C ₀ includes a plurality of branch paths and 8
It has a plurality of path switching valves V _{1 to} V ₈ , and by opening and closing these path switching valves V _{1 to} V ₈ , it is possible to switch according to which path the cooling water circulates. I have. As will be described later, the opening and closing of each of the path switching valves V _{1 to} V ₈ is controlled by a control signal output from the switching control means 4. FIG. 2 shows the relationship between the open / close state of each of the path switching valves V _{1 to} V ₈ and the path selected thereby. Note that FIG.
In the above, ○ indicates that the path switching valve is open, and x indicates that it is closed. As shown in FIG. 2, in this embodiment, the following four routes for circulating the cooling water are set. The route C _a corresponds to the first, third, sixth and eighth
The path switching valves V ₁ , V ₃ , V ₆ , and V ₈ are open, the second, fourth, fifth, and seventh path switching valves V ₂ , V ₄ , V ₅ , and V ₇ are closed, and the engine E Is a path through which the cooling water circulates when is driven. When this path _Ca is selected, the water pump P is turned off, and the cooling water flows between the engine E, the regenerator B, and the heater core H. Circulate. The path _Cb is opened when the first, second, fourth, sixth and eighth path switching valves V ₁ , V ₂ , V ₄ , V ₆ and V ₈ are open and the third, fifth and fifth paths are switched. When the 7-way switching valves V ₃ , V ₅ and V ₇ are closed,
And a path for cooling water is circulated when the engine E is not driven, the water pump P when the path C _b is selected is the ON state, the cooling water from the engine E regenerator B and water pump P And the heater core H. The route C _c is divided into the second, fourth, sixth and seventh paths.
The path switching valves V ₂ , V ₄ , V ₆ , V ₇ are open, the first, third, fifth, and eighth path switching valves V ₁ , V ₃ , V ₅ , V ₈ are closed, and the water pump A path through which the cooling water circulates when P is in the ON state. When this path _Cc is selected, the cooling water circulates between the water pump P, the regenerator B, and the heater core H without passing through the engine E. I do. The route C _d is divided into the first, second, fifth and eighth
When the path switching valves V ₁ , V ₂ , V ₅ and V ₈ are open and the third, fourth, sixth and seventh path switching valves V ₃ , V ₄ , V ₆ and V ₇ are closed, the cooling water When the path _Cd is selected, the cooling water does not pass through the heater core H and the engine E
Circulating between the heat storage unit B and the water pump P. The routes C _a and C _b constitute a first route, and the route C _c constitutes a second route.
The route _Cd constitutes a third route. Which of the routes C _a , C _b , C _c , C _d is selected is
The switching control means 4 performs the arithmetic processing based on the engine ON / OFF signal e, the fast warm-up request signal q, and the temperature detection signals X _E , X _B , and X _G which are input to the switching control means 4, and is determined. You. The operation for selecting a route of the vehicle heating apparatus according to the present embodiment will be described below. FIG. 3 is a flowchart showing an operation for selecting a route of the vehicle heating device according to the present embodiment. In addition, S1, S2, etc. in the figure indicate each step. As shown in FIG. 3, in S1, the switching control means 4 determines whether or not the fast warming ON / OFF button 8 is ON (OFF state) based on whether the fast warming request signal q is output. ) Is determined. If the rapid warm-up ON / OFF button 8 is ON, that is, if rapid heating is requested, the process proceeds to S2 according to YES, where the temperature detecting means 2
a, the temperature detection signal X _E from 2b, on the basis of X _B, determines whether towards the heat storage temperature T _B of the heat accumulator B than the temperature T _E of the cooling water in the water jacket of the engine E is high I do. When the heat storage temperature T _B is higher,
Proceed to 3, based on the temperature detection signal X _G from the outside air temperature detection means 3 at S3, determines whether the outside air temperature T _G is higher or lower than the predetermined reference temperature T _0. When towards the outside air temperature T _G is lower advances to step S4 in accordance with YES, where it controls the opening and closing of the switching valve V ₁ ~V ₈ as shown in FIG. 2 in order to circulate the cooling water according to the route C _c. [0031] Thus towards the heat storage temperature T _B of a heat storage device B is Hayadan request is higher than the temperature T _E of the cooling water in the engine E, the path C _c i.e. the when more low outside air temperature T _G Two paths are selected. At this time, the cooling water circulates between the regenerator B, the heater core H, and the water pump P, bypassing the engine E. By circulating the cooling water in this way, the heat stored in the heat storage device B can be effectively used for heating without being deprived by the cold engine. [0032] When the direction of the heat storage temperature T _B in the above S2 is determined to be lower than the temperature T _E in the water jacket, and S3 when the outside air temperature T _G is determined to be higher than the reference temperature T ₀ in each S5 In S5, it is determined whether or not the engine E is in a driving state based on the engine ON / OFF signal e. When the engine E is driven, the process proceeds to S6, where it controls the opening and closing of the switching valve V ₁ ~V ₈ as shown in FIG. 2 in order to circulate the cooling water according to the route C _a. On the other hand, when the engine E is not driving the process proceeds to S7, where in order to circulate the cooling water according to the route C _b as shown in FIG. 2 for controlling the opening and closing of the switching valve. The heat storage temperature T or lower than the temperature T _E it is the cooling water in the engine E of _B, and high but the outside air temperature towards the heat storage temperature T _B of the thus Hayadan thermal storage even if requester B TG
Is high, the path C _a or the path C _b, that is, the first path is selected, and at this time, the cooling water circulates between the engine E, the regenerator B, and the heater core H. On the other hand, if it is determined in S1 that it is ON, that is, if there is no quick warm-up request, the program proceeds to S8, in which the heat storage temperature TB of the regenerator _B becomes higher than the temperature TE of the cooling water in the water jacket of the engine E in S8. Determine if it is high or low. When it is higher, the process proceeds to S9, and it is determined whether the engine E is in a driving state. S when engine E is not running
Advances to 10, where in order to circulate the cooling water according to the route C _d as shown in FIG. 2 for controlling the opening and closing of the switching valve V ₁ ~V _8. [0035] Thus higher than the temperature T _E it is the cooling water in the engine E of the heat storage temperature T _B of the heat accumulator B without Hayadan request, i.e. the path C _d when not driven further engine E The third route is selected, and at this time, the cooling water circulates between the engine E, the regenerator B, and the water pump P, bypassing the heater core. By circulating the cooling water in this manner, the heat stored in the heat accumulator B can be effectively used for warming up the engine without being taken away by the heater core H. [0036] When the direction of the heat storage temperature T _B in the S8 is determined to be lower than the temperature T _E in the water jacket, and when it is determined that the engine E is driven at S9 proceeds to step S6, respectively, where the cooling water as shown in FIG. 2 in order to circulate according to the path C _a for controlling the opening and closing of the switching valve V ₁ ~V _8. [0037] or lower than the temperature T _E it is the cooling water in the engine E of the heat storage temperature T _B of the thus Hayadan request without even regenerator B, and higher heat storage temperature T _B is the engine E Is driven, the path C _a, that is, the first path is selected. At this time, the cooling water circulates between the engine E, the regenerator B, and the heater core H. As described above, according to the vehicle heating apparatus of the present embodiment, there is a demand for quick heating, the heat stored in the heat storage unit B can be sufficiently utilized, and the outside air temperature is low and rapid heating is performed. Is appropriate, the second path is selected, and the heat stored in the heat accumulator B is effectively used for heating, and the heat stored in the heat accumulator B can be fully utilized without a rapid heating request. When the engine is not running, the third
Select the route and use the heat stored in regenerator B to engine E
In this case, the heat stored in the heat accumulator B can be used efficiently and reliably by selecting the general first path in other cases. Although the embodiment of the heating apparatus for a car according to the present invention has been described above, the heating apparatus for a car according to the present invention is not limited to the specific embodiment of the embodiment, and various changes can be made. Of course you can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a vehicle heating device according to an embodiment of the present invention. FIG. 2 is an open / closed state of each path switching valve in the heating device shown in FIG. FIG. 3 is a flowchart showing a control method of the heating apparatus shown in FIG. 1. [Description of References] 4 Control means 8 Fast warm-up ON / OFF button E Engine B Regenerator H Heat exchanger (heater core) V _{1 to} V ₇ path switching valve C ₀ circulation paths C _a , C _b first path C _c second path C _d third path q fast heating request signal

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Hamamoto 5658 Yoshikawa, Hachihonmatsucho, Higashihiroshima-shi, Hiroshima Japan Climate Systems Co., Ltd. (72) Inventor Masanori Ishikawa 5658 Yoshikawa, Hachimotomatsucho, Higashihiroshima-shi, Hiroshima Japan Climate Systems Corporation (56) References JP-A-55-110612 (JP, A) JP-A-2-120120 (JP, A) JP-A-53-114140 (JP, A) JP-A-2- 120119 (JP, A) JP-A-2-77315 (JP, A) JP-A-58-41605 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 1/02-1 / 30 B60H 1/34-3/06

Claims (1)

Claims: 1. A regenerator for storing heat of cooling water in a circulation path of cooling water for cooling an engine, a heat of the cooling water and a heat of air for heating. A heating apparatus for a vehicle, comprising: a heating heat exchanger that exchanges heat with the heat exchanger; wherein the circulation path circulates the cooling water between the engine, the regenerator, and the heat exchanger. A path, a second path for circulating the cooling water between the heat exchanger and the regenerator by bypassing the engine, and the engine and the regenerator by bypassing the cooling water for the heat exchanger. And a third path for circulating between the cooling water and a path switching valve for switching which of the paths the cooling water is circulated. In addition, when there is a demand for quick heating, the cooling water is supplied through the second In, also when there is no Hayadan request a switching control means for controlling said switching valve to circulate respectively the cooling water in the third path, the switching control means, the thermal storage if there is Hayadan request Container storage
Heat temperature is higher than the temperature of the cooling water in the engine
Sometimes the cooling water is circulated in the second path,
There is no demand for quick heating and the heat storage temperature of the heat storage
The temperature of the cooling water is higher than
If not, the cooling water flows through the third path and
There is no warming requirement and the heat storage temperature of the heat storage
Above the temperature of the cooling water and the engine is running
Circulates the cooling water through the first path
The path switching valve is controlled to
A heating device for an automobile .