JP2010173448A - Heating system for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating system for an automobile capable of performing heating in a cabin in the engine stopping state, promoting warming operation in engine starting, enhancing fuel economy and preventing injury of an engine or the like. <P>SOLUTION: The heating system 1 for the vehicle constituted so as to be provided with a regenerator 7 can perform a thermal storage stroke for accumulating the heat generated in a drive part 2 in the regenerator through a first heating medium; a heating stroke for transferring the heat accumulated in the regenerator to a heating device 16 through a second heating medium to perform heating; and a warming stroke for transferring the heat accumulated in the regenerator to the drive part through the first heating medium to perform warming operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automotive heating system. Specifically, the present invention relates to a heating system for an automobile that can use a heating device even when an engine is stopped by using a heat accumulator and can promote warm-up operation.

  In order to heat the automobile compartment, a heat pump type air conditioner is often used. A general heat pump type air conditioner for a vehicle is configured to take out the rotation of an engine and operate a compressor to move heat from outside air into the room. For this reason, if the engine is not operating, the air conditioner cannot be used in many cases.

  In particular, a truck or the like often takes a nap while the engine is running to operate the heating device. However, there is a problem that the driver cannot rest sufficiently due to engine noise and vibration.

  2. Description of the Related Art A heating device that performs heating by burning fuel of a vehicle and an electric heating device that uses a battery are provided so that the engine can be used in a stopped state.

JP-A-2-220920

  The system that performs heating while the engine is in operation consumes fuel even when the automobile is stopped. For this reason, the problem that a fuel consumption falls also arises.

  In addition, when a heating device is used in a truck or the like, the usage time often takes a long time. Therefore, if the engine is operated, not only the fuel consumption is reduced, but also the amount of carbon dioxide generated is greatly increased, which adversely affects the global environment.

  Even in a heating apparatus that performs heating by burning fuel while the engine is not operated, the fuel is consumed, fuel consumption is reduced, and carbon dioxide is generated.

  On the other hand, a heating device using a battery does not generate carbon dioxide and has few problems as described above. However, the heating device consumes a large amount of power and may damage the battery. Furthermore, since the electric power consumed by the battery needs to be charged when the vehicle is running, the engine is burdened and the fuel consumption is deteriorated.

  In addition, when a conventional heat pump type air conditioner is applied to a hybrid vehicle or an electric vehicle, electric power for operating the compressor is required, and power consumption becomes very large. For this reason, the problem that the life of the battery is shortened easily occurs.

  On the other hand, by performing a warm-up operation of an automobile engine or the like, the viscosity of the lubricating oil or the like can be reduced to improve the fuel efficiency of the automobile, and wear can be reduced to prevent damage to the engine or the like. However, in the conventional warm-up operation, the drive system is warmed by the heat generated by operating the engine, and a certain amount of time is required to obtain the effect. Therefore, fuel is consumed during that time, and a sufficient fuel saving effect cannot be obtained. In many cases, sufficient warm-up time cannot be taken.

  The present invention can heat a vehicle interior while the engine is stopped, promote warm-up operation when starting the engine, improve fuel efficiency, and prevent damage to the engine and the like. The challenge is to provide a system.

  The invention described in claim 1 of the present application is a vehicle heating system configured to include a heat accumulator, and a heat accumulation process for accumulating heat generated in a drive unit in the heat accumulator via a first heat medium. And a heating process in which heating is performed by moving the heat accumulated in the regenerator to the heating device via the second heat medium, and heat accumulated in the heat accumulator via the first heat medium. The present invention relates to an automotive heating system capable of performing a warm-up stroke in which a warm-up operation is performed by moving the drive unit.

  In the present invention, the heat generated in the drive unit such as the engine is accumulated in the heat accumulator, and this heat can be used for heating the interior of the vehicle and warming up the drive unit such as the engine. .

  The heating system according to the present invention can be applied to various automobiles that require cooling of the drive unit. For example, the present invention can be applied not only to automobiles equipped with an internal combustion engine such as a gasoline engine but also to hybrid cars and electric cars.

  As the above heat accumulator, various types of heat accumulators can be adopted as long as they can be mounted on an automobile. In this invention, since it utilizes for not only heating but warm-up operation, it is preferable to employ | adopt a heat storage with a large heat capacity. Moreover, it is preferable to employ a regenerator filled with a solid heat storage material.

  The said 1st heat medium can employ | adopt what is used with the conventional drive part cooling system. For example, an antifreeze liquid (LLC) can be used as the first heat medium.

  The heat storage process in the present invention stores heat generated in the drive unit. For example, in an automobile having an internal combustion engine as a drive unit, the heat generated by the drive unit is often carried to a radiator to be dissipated. In an automobile equipped with such a cooling system, as in the invention described in claim 2, the first heat medium heated in the drive section is moved to the radiator, and the radiator dissipates heat. A drive unit cooling circuit having a low temperature side cooling flow path for returning the first heat medium to the drive unit is provided. In the present invention, a branch is extended from the intermediate portion of the high temperature side cooling flow path, and the heat storage heat input flow path connected to the heat accumulator is extended to the low temperature side cooling flow path extending from the heat accumulator. The above heat storage process can be performed by providing a heat storage circuit having a connected heat storage unit return flow path. That is, in the invention described in claim 2, the heat storage circuit is provided so as to span the high temperature side cooling channel and the low temperature side cooling channel of the driving unit cooling circuit connected from the driving unit to the radiator, and the driving unit It effectively utilizes the heat generated in

  The heating process is performed using a second heat medium different from the first heat medium. That is, as in the invention described in claim 3, the heating heat input flow path for sending the second heat medium heated in the heat accumulator from the heat accumulator to the heating device, and the first heat radiation dissipated in the heating device. The heating process can be performed by providing a heating circuit having a heating return flow path for returning the second heat medium to the regenerator.

  The type of the second heat medium is not particularly limited. For example, water can be used as a heat medium. Further, as in the invention described in claim 9, air can be used as a heat medium. In this case, the air can be directly blown into the passenger compartment, and a circulation circuit and a heat exchanger can be provided for heating as in the case of using water.

  Various types of heating devices can be employed. For example, what can perform heat exchange with the said 2nd heat carrier and vehicle interior air is employable. A floor heating device that heats the floor in the passenger compartment can also be employed. In the present invention, since the exhaust heat of the drive unit is stored and used for heating, heat can be stored while the engine is in operation, and heating can be performed while the engine is stopped. Moreover, since it does not consume fuel, carbon dioxide gas is not discharged. Therefore, it does not adversely affect the environment. In addition, unlike an electric heating device, there is no risk of damage to the battery due to an increase in power consumption.

  Furthermore, in the present invention, it is possible to perform a warming-up process in which the heat accumulated in the heat accumulator is moved to the driving unit via the first heat medium to promote the warming-up operation.

  In the present invention, since the heat generated from the drive unit is stored, the warm-up process can be performed only by returning the accumulated heat to the drive unit. Therefore, it is not necessary to provide a special circuit for the warm-up process. For this reason, a warm-up system can be easily configured using a conventional drive unit cooling circuit. In addition, in order to raise efficiency, the warming-up circuit which sends the heat of the said thermal storage directly to a drive part can also be provided.

  As in the invention described in claim 4, the first valve provided at the connection portion between the high temperature side cooling flow path and the regenerator heat input flow path, the low temperature side cooling flow path, and the regenerator return flow path. The first heat medium heated by the drive unit is sent from the high temperature side cooling flow path to the heat storage heat input flow path and radiated by the heat storage apparatus. The heat storage process can be performed by controlling the first valve and the second valve so as to send the first heat medium from the regenerator return flow path to the low temperature side cooling return flow path. it can. If the first heat medium can be flowed as described above, various types of valves can be used. A plurality of valves can be used in combination. For example, a three-way valve can be adopted for the first valve and the second valve, and the flow path can be controlled to be switched.

  By switching the flow path by controlling the first valve and the second valve, the first heat medium discharged from the drive unit can be introduced into the heat accumulator and the heat accumulation process can be performed. Further, as in the invention described in claim 5, a high temperature side heat medium temperature measuring device that measures the temperature of the first heat medium flowing through the high temperature side cooling flow path, and a heat storage that measures the temperature in the regenerator. By providing a temperature measuring device and controlling each valve based on the measurement values of these measuring devices, the above-described steps can be performed. For example, after the temperature of the first heat medium rises, the heat storage process is started by introducing the first heat medium into the heat accumulator. On the other hand, after the temperature of the heat accumulator reaches a predetermined temperature, the heat storage process is performed. Each valve can be controlled to open and close so as to stop the operation.

  Similarly to the heat storage process, the first heat medium heated by the drive unit is sent from the high-temperature side cooling flow path to the radiator, and the first heat medium radiated by the radiator is used. The drive part cooling stroke can be performed by controlling the first valve and the second valve so as to be sent to the drive part via the low temperature side cooling flow path. That is, the drive unit cooling process is a process of cooling the drive unit as in the conventional case, and the valves may be controlled so that the first heat medium does not flow into the heat storage circuit.

  On the other hand, the second heat medium heated by the heat accumulator is sent to the heating device via the heating heat input flow path, and the second heat medium radiated by the heating device is sent to the heating return flow. The heating process which returns to the said thermal storage device via a path | route can be performed. For example, when a pump that causes the second heat medium to flow is provided, the heating stroke can be performed by operating the pump. The heating process may be performed by measuring the temperature of the regenerator and the temperature of a cabin or the like to be heated, and controlling the pump based on these temperatures.

  Furthermore, a warm-up flow path connected from the second valve to the drive unit is provided, and the first heat medium heated by the heat accumulator is sent to the drive unit via the warm-up flow path. The warm-up stroke can be performed by controlling the first valve and the second valve.

  The warming-up stroke can also be performed using a low-temperature side cooling flow path for cooling the engine. However, when the heat insulation property of the low-temperature side cooling flow path is low or the flow path is long, the temperature of the first heat medium is lowered, and the warm-up process may not be performed effectively. In such a case, as in the invention described in the present claim, by providing a dedicated warm-up channel directly connected to the drive unit or connected to the low-temperature side cooling channel near the drive unit, the warm-up can be effectively performed. It is desirable to carry out the process.

Further, the warm-up operation can be continued when the temperature of the first heat medium flowing out from the drive unit is equal to or lower than a predetermined temperature, and the warm-up operation can be stopped when the temperature exceeds the predetermined temperature. . The warm-up operation can be performed while the driving unit such as an engine is operating.

According to a sixth aspect of the present invention, there is provided a bypass circuit that connects the upstream side of the first valve in the high temperature side cooling channel and the low temperature side cooling channel, and the bypass circuit and the low temperature side cooling channel. A third valve that is provided at the junction and whose opening degree can be changed in accordance with the temperature of the heat medium flowing in the valve, so that a part of the first heat medium flows in the bypass circuit. Thus, the warm-up process is performed.

If the first heat medium is sent to the radiator when the engine is started, it takes time for the temperature of the heat medium to rise. For this reason, a bypass circuit that connects the high temperature side cooling flow path and the low temperature side cooling flow path is often provided. By circulating and flowing the first heat medium through the bypass circuit, the temperature of the heat medium can be quickly increased. For this reason, warm-up operation can be performed quickly.

The bypass circuit employs a valve with a thermostat that can change the opening according to the temperature of the heat medium flowing in the valve. A part of the first heat medium is allowed to flow through the bypass circuit until the temperature reaches a predetermined temperature. In the invention described in claim 6, the system according to the present invention is configured to perform a warm-up stroke together with the bypass circuit.

  According to a seventh aspect of the present invention, when water is flowed as the second heat medium in the heating circuit, and a pump and a water storage tank are provided in an intermediate portion of the heating return flow path, and a heating stroke is not performed. The second heat medium can be held in the water storage tank.

  Since the heating circuit is directly connected to the heat accumulator, even when the second heat medium is not flowing, heat is transferred by convection or heat conduction of the heat medium. For this reason, if there is a heat medium in the heating circuit, heat is radiated from the regenerator even when the heating operation is not performed. Further, the heating device is often located above the regenerator, and a heated heat medium may flow by convection and be radiated into the passenger compartment. By adopting the above configuration, the second heat medium can be retracted from the heating circuit when the heating stroke is not performed. Therefore, the heat accumulated in the regenerator is not consumed unnecessarily.

  As in the invention described in claim 8, when the pump and the water storage tank constituting the heating circuit are provided below the heating device, and the pump is not operating, the second heat in the heating device is provided. The medium can be configured to spontaneously fall into the water storage tank and be stored in the tank. Thereby, when the heating stroke is not performed, the second heat medium can be automatically retracted from the heating circuit.

  The heat accumulated in the heat accumulator can be used for heating even when the drive device is stopped, and the heat can be used for the warm-up operation of the drive device.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 shows an outline of a circuit of an automotive heating system according to the present embodiment. FIG. 2 shows the configuration of the control device according to the present embodiment.

  As shown in FIG. 1, the present embodiment includes an engine 2 as a driving device, a radiator 3, a high-temperature side cooling flow path 4 that allows a first heat medium to flow between the engine 2 and the radiator 3, and a low temperature. The heating system 1 according to the present invention is applied to an automobile provided with a drive part cooling circuit 6 composed of a side cooling flow path 5.

  In the drive unit cooling circuit 6, the first heat medium that has cooled the engine 2 is sent to the radiator 3 through the high temperature side cooling flow path 4. In the radiator 3, heat is radiated from the first heat medium using water or outside air. Then, the first heat medium whose temperature has been reduced due to heat dissipation is returned to the engine 2 through the low temperature side cooling flow path 5. Antifreeze (LLC) is used as the first heat medium. The first heat medium is circulated in the flow path while the engine is operating by the circulation pump P1 provided in the low temperature side cooling flow path 5 to prevent the engine 2 from overheating.

  In the heating system 1 according to the present embodiment, a heat accumulator 7 that stores heat from the first heat medium flowing through the high temperature side cooling flow path 4 is provided, and heating is performed using heat stored in the heat accumulator 7. . In order to provide the heat accumulator 7, the heat accumulator 7 diverges from and extends from the intermediate portion of the high temperature side cooling flow path 4, and extends from the heat accumulator 7. A heat storage circuit 10 having a heat storage return channel 9 connected to the low temperature side cooling channel 5 is provided.

  For example, in a general gasoline engine vehicle, the temperature of the first heat medium flowing through the high temperature side cooling flow path 4 during operation of the engine 2 is about 110 ° C. to 120 ° C. in a steady state. In the flow path, the temperature is lowered to about 90 ° C to 80 ° C. In the present embodiment, heat is stored in the heat accumulator 7 using the temperature difference.

  In order to introduce the first heat medium into the heat storage circuit 10, a first three-way valve A is provided at a branch point where the heat storage heat input flow path 8 branches from the high temperature side cooling flow path 4. . The three-way valve A can switch the flow path of the first heat medium toward the radiator 3 side and the heat accumulator 7 side so that the first heat medium is not sent to the radiator 3. The high temperature side cooling flow path 4 can be closed.

  On the other hand, the heat accumulator return flow path 9 is provided with a second three-way valve B for returning the first heat medium radiated by the heat accumulator 7 to the low temperature side cooling flow path. In the present embodiment, the second three-way valve B is provided at an intermediate portion of the heat accumulator return flow path 9. In addition, the flow path can be switched between a warm-up flow path 11 for a warm-up stroke, which will be described later, and the low-temperature side cooling flow path 5, and the heat storage circuit 10 can be closed.

  The first three-way valve A is controlled so that the high temperature side cooling channel 4 and the regenerator heat input channel 8 are communicated, and the heat storage return channel 9 is communicated with the low temperature side cooling channel 5. By controlling the second valve B so that the first heat medium is introduced from the high temperature side cooling flow path 4 to the heat storage circuit 10, the heat storage process can be performed. Further, the heat accumulator 7 can be disconnected from the drive unit cooling circuit 6 by closing the heat accumulator heat input flow path 8 and the heat accumulation return flow path 9.

  In the present embodiment, the heating system 1 is applied to floor heating in a space for taking a nap in a truck or the like.

  In order to perform the floor heating, a floor heating device 16 is provided in the passenger compartment floor, and a heating input heat flow for sending the second heat medium heated in the regenerator 7 from the regenerator 7 to the heating device 16 A heating circuit 14 having a passage 12 and a heating return passage 13 for returning the second heat medium radiated in the heating device 16 to the regenerator 7 is provided. In the present embodiment, water is used as the second heat medium, and a circulation pump P2 and a tank 15 for storing the water are provided in the heating return flow path 13. A valve D for closing the heating circuit 14 is provided in the heating heat input flow path 12.

  The present embodiment is configured to perform the warm-up operation of the engine 2 using the heat accumulator 7. In order to perform the warm-up operation, a warm-up flow path 11 extending from the second valve B and connected to the low temperature side cooling flow path 5 in the vicinity of the engine 2 is provided. The warm-up flow path 11 is provided to flow the first heat medium heated by the heat accumulator 7, and is subjected to heat insulation.

  If the upper first heat medium is circulated through the radiator at the start of the warm-up operation of the engine 2, it takes time to increase the temperature. In the present embodiment, a bypass circuit 17 that connects the upstream side of the first valve A in the high temperature side cooling flow path 4 and the low temperature side cooling flow path 5 is provided. By providing the bypass circuit 17, the first heat medium can be quickly heated to promote the warm-up operation.

A third valve 1 </ b> C is provided at a connection portion between the bypass circuit 17 and the low temperature side cooling flow path 5. As said valve C, the valve with a thermostat which can change an opening degree according to the temperature of the heat medium which flows through the inside of the valve is employ | adopted. Part of the first heat medium is allowed to flow through the bypass circuit until the temperature reaches 80 ° C. to 84 ° C. Thereby, during the warm-up operation, the first heat medium heated by the engine 2 can be relieved from being cooled by the radiator 3, and the warm-up operation can be promoted. In the present embodiment, the drive unit cooling circuit 6 including the bypass circuit 17 is incorporated with a heating system according to the present invention, and is configured to promote a warm-up stroke together with the bypass circuit.

  As shown in FIG. 2, in this embodiment, the valves A, B, D, pumps P1, P2, and temperature measuring devices T1, T2, T4 are configured to be controlled using a heat accumulator control unit. Yes.

  Next, based on the flowcharts shown in FIGS. 3 and 4, each process performed using each of the above devices will be described.

  As shown in FIG. 3, in the heating system 1 according to the present embodiment, first, a mode is selected (S101). The above modes include a floor heating mode, a warm-up mode, a heat storage mode, and an engine cooling mode. The heat storage mode and the engine cooling mode are automatically selected unless another mode is selected.

  The procedure (S104-S117) for storing heat from the first heat medium in the heat accumulator 7 will be described below. In the engine cooling mode, only the first heat medium is circulated between the engine 2 and the radiator 3, and the engine cooling mode is performed in any engine, and thus the description thereof is omitted.

  First, it is determined whether the heat accumulator 7 can store heat. In order to perform heat storage, it is necessary to confirm that the first heat medium in the high temperature side cooling flow path 4 is heated and that the heat accumulator 7 has a capacity capable of storing heat. First, it is determined whether the engine 2 is operating. If the engine 2 is in operation, exhaust heat is generated and the pump P1 is also in operation, so a heat storage process can be performed. When the engine is operating (Yes in S118), in the present embodiment, the first valve A is set so that the first heat medium flows to the heat storage heat input flow path side (heat storage side), and the above The second valve B is set so that the first heat medium flows through the low temperature side cooling flow path side (low temperature side) (S104). Thereby, the first heat medium is introduced into the heat storage circuit 10. The pump P1 is started when the engine is started. When the engine 2 is not operating (No in S118), the heat storage process and the cooling process cannot be performed, and thus the control ends (S109).

  In this state, the temperature of the first heat medium flowing in the vicinity of the valve A of the high temperature side cooling flow path 4 is measured using the high temperature side heat medium temperature measuring device T1.

  When the temperature of the high-temperature side heat medium is equal to or higher than a certain temperature, in this embodiment, when it is 90 ° C. or higher (No in S106), the engine 2 is overheated and needs to be cooled. The first valve A is controlled so that flows to the radiator 3 side (S112). Further, the valve B is closed (S113), and control is performed so as not to perform the heat storage stroke. Thereby, overheating of the engine can be prevented.

  When the temperature of the first heat medium is lower than a certain temperature, or lower than 90 ° C. in this embodiment (Yes in S106), the temperature of the heat accumulator 7 is measured by the heat storage temperature measuring device T2 (S107). ). Further, in the case where the temperature in the regenerator is equal to or higher than a certain temperature, in the present embodiment, in the case where the temperature of the regenerator 7 is 80 ° C. or higher (No in S108), there is no need for heat storage, and the high temperature side cooling channel 4 The first valve A is controlled and the second valve B is closed so that the first heat medium flowing through the radiator 3 flows toward the radiator 3 (S116). Thereby, the said heat storage device 7 is interrupted | blocked from the said cooling circuit 6, and the heat storage device 7 is put into a heat retention state (S117). In this case, after a predetermined time has elapsed, the temperature of the first heat medium flowing through the high temperature side cooling flow path 4 is measured again (S105), the temperature of the heat accumulator 7 is measured (S107), and whether or not heat storage is necessary. Determination is made (S108). In this embodiment, the heat storage start temperature is set to 80 ° C., but this temperature is determined by the specifications of the heat storage material. Moreover, although the heat storage end temperature is set to 90 ° C., this temperature is determined by the heat capacity of the engine 2 and the radiator 3.

  When the temperature of the heat accumulator 7 is lower than 80 ° C. (Yes in S108), it is checked whether the engine 2 is operating. When the engine is not operating (No in S109), since the heat storage heat source cannot be secured, the first valve A is set so that the first heat medium flowing through the high temperature side cooling flow path 4 flows to the radiator 3 side. While controlling, the said 2nd valve B is closed (S114). In this case, the pump P1 is in a stopped state. Thereby, control is complete | finished, the said heat accumulator 7 is interrupted | blocked from the said cooling circuit 6, and the heat accumulator 7 is put into a heat retention state (S115).

  When the engine 2 is in operation (Yes in S109), the first valve A is controlled so that the first heat medium flows to the heat accumulator 7, and the first heat flowing out from the heat accumulator 7 is obtained. The second valve B is controlled so that the medium flows into the low temperature side cooling flow path 5 (S110). Thereby, the said 1st heat medium is continuously introduce | transduced into the said thermal storage circuit 10, and the thermal storage to the thermal accumulator 7 is performed (S111). In the heat storage process, the temperature of the first heat medium is measured every predetermined time (S105), and the following steps are repeated.

  By adopting the above steps in the heat storage process, the heat storage process can be performed without damaging the engine and the radiator.

  Next, the control (S201 to S205) when the warm-up mode is selected (Yes in S103) will be described.

  The warm-up process according to the present embodiment is for the purpose of accelerating the warm-up operation by adding the heat of the heat accumulator 7 when the warm-up operation of the engine 2 is performed, and finishing the warm-up operation in a short time. Yes.

  When the engine 2 is not operating (No in S201), the warm-up stroke is not performed. When the engine is operating (Yes in S201), the temperature of the heat accumulator 7 is measured by the heat storage temperature measuring device T2 (S202). When the temperature of the heat accumulator 7 is 80 ° C. or more (Yes in S203), the first valve A is controlled so that the first heat medium is introduced into the heat accumulator flow path 8, and the heat accumulator 7 The second valve B is controlled so that the first heat medium heated in step 1 flows into the warm-up flow path 11 (S204). As a result, the first heat medium heated by the heat accumulator 7 is supplied to the engine 2 to perform a warm-up stroke (S205). In the warm-up stroke, the temperature of the heat accumulator 7 is measured every predetermined time (S202). When the temperature of the heat accumulator 7 is 80 ° C. or lower (No in S203), it is determined that the engine cannot be warmed up, and flows through the high temperature side cooling flow path 4 by the high temperature side heat medium temperature measuring device T1. The temperature of the first heat medium is measured (S105), and the following steps of the flowchart are executed. When the above-described conditions for performing the heat storage process are satisfied, the heat storage process (S111) is performed.

  By performing the warming-up stroke S205, it is possible to quickly warm up when starting the engine, and it is possible to reduce the time required for warming up. Further, since the heat accumulated in the heat accumulator 7 is accumulated heat exhausted from the engine 2, the fuel consumption does not increase.

  Next, control (S301 to S308 and S401 to S407) when the floor heating mode is selected (Yes in S102) will be described based on FIG.

  When the heating stroke is performed, the control differs depending on whether the engine 2 is operating or not.

  When the engine 2 is operating (Yes in S301), the temperature of the first heat medium flowing through the high temperature side cooling flow path 4 is measured by the high temperature side heat medium temperature measuring device T1 (S302). When the temperature of the first heat medium is not lower than 90 ° C., that is, when the temperature is 90 ° C. or higher (No in S303), it is determined that the engine 2 is in an overheated state. Therefore, in order to cool the first heat medium, the first valve A is controlled so that the first heat medium flows to the radiator 3 side, and the valve B is closed (S309), and the heat storage process is performed. Control to not. Thereby, overheating of the engine can be prevented. In order to prevent overheating of the engine 2, for example, the valve A is opened 80% to the radiator side, and the first heat medium is reliably supplied to the radiator 3 to prevent overheating of the engine 2 while maintaining 20% Can be distributed to the heat accumulators to store heat and be used as a heat source for heating.

  When the temperature of the first heat medium is lower than 90 ° C. (Yes in S303), the first valve A is controlled so that the first heat medium flows into the heat storage circuit 10, and the first heat medium The second valve B is controlled so that the medium flows from the heat storage return flow path 9 to the low temperature side cooling path 5 (S304). By this control, the heat storage process (S111) described above is executed, and heat is stored in the heat storage unit 7 from the first heat medium.

  Next, the floor temperature measuring device T4 measures the temperature of the floor provided with the floor heating device 16 (S305). When the floor temperature is equal to or lower than the set temperature (Yes in S306), it is determined that heating is necessary, the pump P2 of the heating circuit 14 is operated, and the second heat medium is circulated through the heating circuit 14. (S307). Thereby, the floor heating stroke when the engine is operating is performed.

  If the floor temperature is equal to or higher than the set temperature, it is determined that heating is not necessary, and the pump P2 is stopped (S308). While the floor heating mode is selected, the floor temperature is measured every predetermined time (S305), and the pump P2 is operated when the floor temperature becomes a predetermined temperature or less (307). By employing the above steps, the floor temperature can be maintained at an appropriate temperature.

  When the engine 2 is not operating (No in S301), the first heat medium cannot be continuously stored, and therefore the first heat medium flows to the radiator 3 so that the first heat medium flows. The first valve A is controlled and the second valve B is closed (S401). Thereby, the said heat storage device 7 is interrupted | blocked from the said cooling circuit 6, and is put into a heat retention state.

  In the above state, the temperature of the heat storage device 7 is measured by the heat storage temperature measuring device T2 (S402). When the temperature of the heat accumulator 7 is not 80 degrees or more (No in S403), it is determined that the heat accumulator 7 does not have the amount of heat for floor heating, and the control ends (S408). In this case, since the engine 2 is not operating, it is impossible to perform a heat storage stroke.

  When the temperature of the heat accumulator 7 is 80 ° C. or higher (Yes in S403), the floor temperature measuring device T4 measures the temperature of the floor on which the floor heating device 16 is provided (S404). When the floor temperature is equal to or lower than the set temperature (Yes in S405), it is determined that heating is necessary, the pump P2 of the heating circuit 14 is operated, and the second heat medium is circulated through the heating circuit 14. (S406). Thereby, the floor heating stroke when the engine is not operating is performed.

  When the floor temperature is equal to or higher than the set temperature (No in S405), it is determined that heating is not necessary, and the pump P2 is stopped (S407). When the engine 2 is stopped (No in S301), the temperature of the regenerator 7 is measured by the heat storage temperature measuring device T2 every predetermined time (S402), and the temperature of the regenerator 7 is less than 80 ° C. When it becomes, the pump P2 is stopped and a heating process is complete | finished (S408).

  By performing the heating process, the heating device can be operated even when the engine 2 is not operating.

  In the present invention, water is used as the second heat medium, and the heat accumulator 7, the tank 15 and the pump P2 are installed below the floor heating device 16. Thereby, the second heat medium can be stored in the tank 15 in a state where the pump P2 is not operated. Further, by stopping the pump, the second heat medium in the floor heating device 16 can be naturally dropped onto the tank 15. In addition, the 4th valve D is provided in the said heating heat input flow path 13, and it is comprised so that the said 2nd heat medium may not flow into the said floor heating apparatus 16 at the time of non-use. Thereby, when the floor heating apparatus 16 is not used, the heat stored in the regenerator 7 is not radiated through the second heat medium.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  Heating can be performed while the engine is stopped using the heat accumulator, and warm-up operation can be promoted when the engine is started.

It is a circuit diagram which shows the structure of the heating system which concerns on this invention. It is a block diagram which shows the control system of each apparatus of a heating system. It is a flowchart which shows each process of a heating system. It is a flowchart which shows each process of a heating system.

DESCRIPTION OF SYMBOLS 1 Vehicle heating system 7 Heat storage 2 Drive part (engine)
16 Heating device

Claims (9)

A vehicle heating system configured with a heat accumulator,
A heat storage process for storing heat generated in the drive unit in the heat storage unit via the first heat medium;
A heating process for heating by moving the heat accumulated in the heat accumulator to the heating device via the second heat medium; and
The heating system for motor vehicles which can perform the warming-up process which moves the heat accumulate | stored in the said thermal storage device to the said drive part via the said 1st heat medium, and performs warming-up operation. A drive having a high temperature side cooling flow path for moving the first heat medium heated in the drive section to the radiator, and a low temperature side cooling flow path for returning the first heat medium radiated in the radiator to the drive section. With a partial cooling circuit,
A heat storage heat input flow path branched from and extended from an intermediate portion of the high temperature side cooling flow path and connected to the heat storage device, and a heat storage extending from the heat storage device and connected to the low temperature side cooling flow path The automotive heating system according to claim 1, wherein a heat storage circuit having a container return flow path is provided to perform the heat storage process.   A heating heat input flow path for sending the second heat medium heated in the regenerator from the regenerator to the heating device, and a heating return flow for returning the second heat medium radiated in the heating device to the regenerator The heating system for motor vehicles in any one of Claim 1 or Claim 2 which provides the heating circuit which has a path, and performs the said heating process. A first valve provided at a connection portion between the high temperature side cooling flow path and the regenerator heat input flow path;
A second valve provided in the regenerator return flow path;
Comprising a warm-up flow path leading from the second valve to the drive unit;
The first heat medium heated by the drive unit is sent from the high temperature side cooling flow path to the heat accumulator heat input flow path, and the first heat medium radiated by the heat accumulator is returned to the heat accumulator return flow. A heat storage stroke for controlling the first valve and the second valve so as to be sent from the passage to the low temperature side cooling passage;
The first heat medium heated by the drive unit is sent from the high-temperature side cooling channel to the radiator, and the first heat medium radiated by the radiator is passed through the low-temperature side cooling channel. A drive unit cooling stroke for controlling the first valve and the second valve to be sent to the drive unit;
The second heat medium heated by the heat accumulator is sent to the heating device via the heating heat input flow channel, and the second heat medium radiated by the heating device is sent to the heating return flow channel. And the heating process to return to the heat accumulator through,
Performing a warm-up stroke for controlling the first valve and the second valve so that the first heat medium heated by the heat accumulator is sent to the drive unit via the warm-up flow path. The automotive heating system according to any one of claims 2 and 3, wherein A high temperature side heat medium temperature measuring device for measuring the temperature of the first heat medium flowing through the high temperature side cooling flow path, and a heat storage temperature measuring device for measuring the temperature in the heat accumulator,
The automotive heating system according to claim 4, wherein each of the steps is performed by controlling each valve based on a measurement value of these measuring devices. A bypass circuit connecting the upstream side of the first valve in the high temperature side cooling flow path and the low temperature side cooling flow path;
A third valve that is provided at a joining portion between the bypass circuit and the low-temperature side cooling flow path, and that can change an opening according to the temperature of the heat medium flowing in the valve;
6. The automotive heating system according to claim 4, wherein the warming-up process is performed such that a part of the first heat medium flows in the bypass circuit. The heating circuit allows water to flow as the second heat medium,
Provide a pump and a water storage tank in the middle of the heating return flow path,
The automotive heating system according to any one of claims 1 to 6, wherein the second heat medium can be held in the water storage tank when a heating stroke is not performed.   The pump and the water storage tank are provided below the heating device. When the pump is not operating, the second heat medium in the heating device naturally falls into the water storage tank and the tank. The vehicle heating system according to claim 7, wherein the vehicle heating system is configured to be stored in the vehicle.   The automotive heating system according to any one of claims 1 to 6, wherein air is used as the second heat medium in the heating circuit.

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