KR101309199B1 - Air conditioner for vehicle - Google Patents

Abstract

The present invention relates to a vehicle air conditioner, and more particularly, in an air conditioner using a cooling water inside a heater core as a heat storage or a heat storage material, a heat storage heat exchanger for mutually heat-exchanging the cooling water and a refrigerant, or an inlet pipe of a heater core. It is installed on the outlet pipe and arranged in series with the heater core, and cooled or regenerated with the coolant in the regenerator heat exchanger in the cooling and heating mode, and then circulates the regenerated or regenerated coolant to the heater core when the engine is stopped. Prevents the discomfort of the occupant by preventing the temperature of the air discharged from the air conditioning case from suddenly changing in the engine mode or heating mode, and also the overall structure is simple because the cold storage heat exchanger is arranged in series with the heater core. Pipes for connecting heat storage heat exchangers and heater cores (route) can improve the assemblability, and by cooling the cooling water with the refrigerant through the cold storage heat exchanger to improve the speed of the cold storage, as well as the refrigerant and the coolant flows in the cross-flow to improve the heat exchange performance Relates to a device.

Description

Automotive air conditioning unit {AIR CONDITIONER FOR VEHICLE}

The present invention relates to a vehicle air conditioner, and more particularly, to a vehicle air conditioner using a cooling water of a heater core having a flow control valve as a heat storage or a heat storage material.

Generally, the air conditioner for a vehicle is an automobile interior which is installed for the purpose of securing the front and rear view of the driver by removing the casting which is to be cooled or heated in the summer or winter season, or in case of rain or windshield during rainy or winter season Such an air conditioner is usually equipped with a heating device and a cooling device at the same time, and selectively introduces outside air or indoor air, and then the air is heated or cooled to blow air into the inside of the vehicle.

According to the independent structure of the blower unit, the evaporator unit, and the heater core unit, the air conditioner includes a three-piece type in which the three units are independently provided, and an evaporator unit and a heater core unit, And a center mounting type in which all of the three units are incorporated in an air conditioning case can be categorized into a semi-center type in which a fan unit is installed as a separate unit, and a center mounting type in which all the three units are incorporated in an air conditioning case.

1 shows the semi-center type air conditioner, in which the air inlet 11 is formed at the inlet side, and the defrosting is controlled by the mode door 16 at the outlet side. An air conditioning case 10 provided with a vent 12a, a face vent 12b, and floor vents 12c and 12d; An air blower (not shown) connected to the air inlet 11 of the air conditioning case 10 to blow indoor air or outdoor air; An evaporator (2) and a heater core (3) embedded in the air conditioning case (10); The opening of the cold air passage P1 which is installed between the evaporator 2 and the heater core 3 and bypasses the heater core 3 and the warm air passage P2 which passes through the heater core 3, And a temperature control door 15 for controlling the temperature.

In addition, a partition wall 17 is formed between the rear side of the heater core 3 and the floor vents 12c and 12d to partition each other. Here, the floor vents 12c and 12d are separated into a front seat vent 12c and a rear seat vent 12d.

According to the vehicle air conditioner 1 configured as described above, when the maximum cooling mode is operated, the temperature control door 15 opens the cold air passage P1 and closes the hot air passage P2. do. Accordingly, the air blown by the blower not shown is exchanged with the refrigerant flowing through the evaporator 2 while passing through the evaporator 2 to be changed into cold, and then the mixing chamber (Mixing) through the cold air passage (P1) Chamber (MC), and is discharged to the vehicle interior through the vent (12a ~ 12d) is opened in accordance with the predetermined air conditioning mode, thereby cooling the vehicle interior.

In addition, when the maximum heating mode is activated, the temperature control door 15 closes the cold air passage P1 and opens the hot air passage P2. Accordingly, the air blown by the blower not shown is heat exchanged with the coolant flowing through the inside of the heater core 3 while passing through the heater core 3 through the hot air passage (P2) after passing through the evaporator (2) After changing to warmth, the liquid flows toward the mixing chamber MC, and is then discharged into the vehicle interior through the vents 12a to 12d opened according to a predetermined air conditioning mode, thereby heating the vehicle interior.

When the mixing mode is activated, the temperature control door 15 rotates to a neutral position to open both the cold air passage P1 and the hot air passage P2 with respect to the mixing chamber MC. Therefore, after the cool air passed through the evaporator 2 and the warm air passed through the heater core 3 are mixed by flowing toward the mixing chamber MC, the vents 12a to 12d are opened to the vehicle interior through the air conditioning mode. Discharged.

On the other hand, in recent years, in order to protect the environment and improve fuel efficiency of a vehicle engine, a vehicle (eg, a vehicle that runs economically, such as a hybrid vehicle) that automatically stops the engine at a stop such as waiting for a traffic signal has been put into practical use.

However, a compressor (not shown) constituting a refrigeration cycle in the air conditioner 1 is generally driven by a vehicle engine. In the above-described economical vehicle, the compressor is also stopped every time the engine is stopped, and the air conditioner is turned off. In the summer, the temperature of the cooling evaporator 2 rises, and the temperature of the air discharged into the vehicle interior also rises sharply, resulting in discomfort to the occupants.

In order to solve the above problem, as illustrated in FIG. 1, a cold storage heat exchanger 4 in which a cold storage material is enclosed is installed at the rear side of the evaporator 2. There is a limit in preventing the temperature rise because the discharge temperature is alleviated to increase depending only on the cold storage heat exchanger (4).

In addition, since the cold storage material in the cold storage heat exchanger (4) is cooled only by cold air that has passed through the evaporator (2), it takes a long time to cool the accumulator, and thus there is a problem in that the cold storage quickness decreases.

In addition, when the engine is stopped in winter, there is no device to compensate for the heating performance, and when the engine is stopped, the coolant circulated to the heater core 3 also stops, so that cool wind is discharged from the air conditioning case 10 to the interior of the vehicle, and the temperature of the air rapidly increases. There was a problem of descent and discomfort to the occupants.

An object of the present invention for solving the above-mentioned problems is an inlet pipe or outlet of a heater core in an air conditioning apparatus using a cooling water inside a heater core as a heat storage material or a heat storage material. It is installed on the pipe and arranged in series with the heater core, and in the cooling and heating mode, by cooling or accumulating the cooling water in the cold storage heat exchanger, and circulating the cooling or regenerated cooling water to the heater core when the engine is stopped, the cooling mode Alternatively, the temperature of the air discharged from the air conditioning case during the engine stop in the heating mode is prevented from being changed suddenly to prevent discomfort of the occupant, and the accumulator heat exchanger is arranged in series with the heater core to simplify the overall structure. The route of the pipe for connecting the regenerative cooling heat exchanger and the heater core as well as reducing the cost te) is simple and can improve the assemblability, and by cooling the cooling water with the refrigerant through the cold storage heat exchanger, the rapid cooling effect of the cold storage is improved, as well as the coolant and the coolant flows intersecting to improve the heat exchange performance. To provide.

The present invention for achieving the above object, between the air conditioner, the evaporator and the heater core which is sequentially installed in the air flow direction inside the air conditioning case, between the inlet and outlet pipes of the heater core and the cooling water pipe of the engine And a flow rate control valve installed to control the flow rate of the cooling water circulating from the engine to the heater core, the vehicle air conditioner using the cooling water inside the heater core as the heat storage or the heat storage material, wherein the heater core is circulated from the engine. A cold storage heat exchanger is provided on the cooling water circulation line to store a predetermined amount of the cooling water and exchange heat between the cooling water and the refrigerant circulating in the evaporator. The cold storage heat exchanger is installed on an inlet pipe or an outlet pipe of the heater core. It is characterized in that it is connected in series with the core.

The present invention relates to an air conditioner using cooling water inside a heater core as a heat storage material or a heat storage material, wherein a heat storage heat exchanger for mutual heat exchange between the cooling water and a refrigerant is provided on an inlet pipe or an outlet pipe of a heater core in series with the heater core. Air conditioning case when the engine is stopped in the cooling mode or the heating mode by circulating the heat accumulating or regenerated coolant in the cooling water in the cold storage heat exchanger in the cooling and heating mode, and then circulating the cooled or regenerated cooling water to the heater core. The unpleasantness of the occupant is prevented by preventing the temperature of the air discharged from the abrupt change.

In addition, by arranging the cold storage heat exchanger in series with the heater core, the pipe structure and the route of the pipe for connecting the heater core and the cold storage heat exchanger are simplified, so that the overall structure is simple, and thus the number and cost of parts Is reduced and the assembly is improved.

In addition, by arranging the cold storage heat exchanger in series with the heater core, it is possible to control the circulation direction of the cooling water during the cold storage and heat storage with one flow control valve without additionally configuring a separate valve, thereby reducing the number of parts and reducing the cost. have.

In addition, since the cold storage heat exchanger and the heater core are arranged in series, the flow resistance of the cooling water is reduced, thereby improving the cooling or heat storage performance.

Further, by forming a coolant passage and a coolant passage that intersects the coolant passage with the inside of the cold storage heat exchanger, by mutually heat-exchanging the cold refrigerant flowing through the refrigerant pipe on the outlet side of the evaporator and the cooling water in the cold storage heat exchanger. The coolant in the cold storage heat exchanger cools more rapidly, thereby improving the fast storage efficiency and improving the storage efficiency.

In addition, the cooling water passage and the refrigerant passage are formed to cross each other in the cold storage heat exchanger, whereby the refrigerant flowing in the refrigerant passage and the cooling water flowing in the cooling water passage are also exchanged while exchanging heat exchange performance.

In addition, by forming the upper and lower tanks and the intermediate tanks in the heat storage heat exchanger to increase the cooling water storage space, it is possible to greatly increase the heat storage capacity or heat storage capacity, thereby cooling and heating can be continued for a long time when the engine is stopped. To improve cooling and heating performance.

In addition, by configuring the refrigerant pipe of the outlet side of the evaporator to be connected to the refrigerant passage of the heat storage heat exchanger, it is possible to prevent the cooling performance of the evaporator from being lowered in the cooling mode.

In addition, when the engine is stopped in the heating mode, not only the hot coolant in the cold storage heat exchanger but also the engine coolant remaining in the hot state may further improve heating performance.

1 is a sectional view showing a conventional automotive air conditioner,
2 is a block diagram showing a cooling mode of the vehicle air conditioner according to the present invention,
3 is a block diagram showing a heating mode of the vehicle air conditioner according to the present invention,
Figure 4 is a perspective view of the heat storage heat exchanger of the vehicle air conditioner according to the present invention,
5 is an exploded perspective view showing a cold storage heat exchanger of the vehicle air conditioner according to the present invention;
6 is a sectional view taken along line AA in Fig. 5,
7 is a cross-sectional view taken along line BB of FIG.
8 is a perspective view showing a vehicle air conditioner according to the present invention;
9 is a sectional view showing a cooling mode in a vehicle air conditioner according to the present invention,
10 is a cross-sectional view showing the engine stopped during the cooling mode in the vehicle air conditioner according to the present invention;
11 is a cross-sectional view showing a heating mode in the vehicle air conditioner according to the present invention;
12 is a cross-sectional view showing the engine stopped during the heating mode in the vehicle air conditioner according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown, the vehicle air conditioner 100 according to the present invention, the air inlet 111 is formed on the inlet side and a plurality of air outlets are formed on the outlet side and the air inlet 111 and a plurality of air therein An air conditioner case 110 having an air passage communicating with the discharge port, and an evaporator 104 installed upstream of the air flow direction on the air passage inside the air conditioning case 110, in which refrigerant of the air conditioning system circulates, and a downstream side thereof. Installed in the engine 160 is configured to include a heater core 102 for circulating the coolant.

Here, the air conditioning system is configured by connecting the compressor 101, the condenser 102, the expansion valve 103, the evaporator 104 by the refrigerant pipe 105, the operation of the compressor 101 in the cooling mode The refrigerant circulates through the compressor 101, the condenser 102, the expansion valve 103, and the evaporator 104. In this process, the air passing through the evaporator 104 exchanges heat with the cold refrigerant in the evaporator 104. After cooling, the air is discharged into the vehicle cabin through the air outlet of the air conditioning case 110 to be cooled.

The air inlet 111 of the air conditioning case 110 is provided with a blowing device (not shown) for blowing indoor air or outdoor air.

The plurality of air discharge ports formed at the outlet side of the air conditioning case 110 may include a defrost vent 112a for discharging air toward the windshield of the vehicle and a face vent for discharging air toward the face of the front occupant. 112b and floor vents 112c and 112d for discharging air toward the foot of the occupant are formed.

Here, the floor vents 112c and 112d are branched into a front seat vent 112c and a rear seat vent 112d.

In addition, the defrost vent 112a, the face vent 112b, and the floor vents 112c and 112d are opened and closed by the mode door 113, respectively.

In the drawings, only the case in which the center pivot type mode door 113 in which the plates on both sides of the rotating shaft are rotated is installed, but various door shapes may be installed.

In addition, the mode doors 113 are connected to a cam (not shown) or a lever (not shown) which is directly driven through an actuator (not shown) installed on the outer surface of the air conditioning case 110 or driven by an actuator, and rotates. In operation, it adjusts the opening of each vent.

The heater core 120 includes upper and lower tanks 121 and 122 spaced apart from each other by a predetermined interval up and down, a plurality of tubes 123 connecting the upper and lower tanks 121 and 122, and the plurality of tubes. The heat dissipation fin 124 interposed between the 123 and the inlet and outlet pipes 120a and 120b connected to the upper and lower tanks 121 and 122.

At this time, the inlet pipe (120a) is connected to one end of the lower tank 122, the outlet pipe (120b) is connected to one end of the upper tank 121 and the inlet, outlet pipes (120a, 120b) ) Is disposed on the outer surface of the air conditioning case 110 to penetrate through one side of the air conditioning case 110.

In addition, the inlet and outlet pipes 120a and 120b of the heater core 120 are formed to extend toward the engine room of the vehicle along the outer surface of the air conditioning case 110, and the coolant pipes of the engine 160 161 is in communication with each other.

Therefore, when the engine 160 is operated, the hot coolant heated from the engine 160 circulates the heater core 120, and then returns to the engine 160 again. In the above process, the heater core ( The air passing through the heat exchanger 120 is heated by heat exchange with hot cooling water in the heater core 120 and then discharged into the vehicle interior through the air discharge port of the air conditioning case 110 to heat the air.

On the other hand, the inlet refrigerant pipe 105a and the outlet refrigerant pipe 105b connected to the evaporator 104 also have the air conditioning case 110 in which the inlet and outlet pipes 120a and 120b of the heater core 120 are disposed. Through one side of the) is disposed on the outer surface of the air conditioning case (110).

That is, the inlet and outlet pipes 120a and 120b of the heater core 120 and the inlet and outlet refrigerant pipes 105a and 105b of the evaporator 104 are disposed adjacent to one side of the air conditioning case 110. Will be.

In addition, a flow control valve 150 is installed between the inlet and outlet pipes 120a and 120b of the heater core 120 and the coolant pipe 161 of the engine 160.

The flow control valve 150 controls the flow rate of the cooling water circulating from the engine 160 to the heater core 120. For example, in the heating mode, the flow control valve 150 is opened as shown in FIG. The hot coolant supplied from the engine 160 circulates the heater core 120 and then returns to the engine 160. In the cooling mode, the flow control valve 150 is closed as shown in FIG. The hot coolant supplied from the 160 is turned in the flow control valve 150 to return to the engine 160 so that the coolant bypasses the heater core 120.

In addition, the flow control valve 150 may control the temperature of the air discharged into the vehicle cabin by adjusting the flow rate of the hot cooling water circulated from the engine 160 to the heater core 120.

On the other hand, the temperature of the air discharged into the cabin by adjusting the flow rate of the cooling water through the flow control valve 150 may be adjusted, in addition to the temperature control door in front of the heater core 120, although not shown in the figure It is possible to adjust the temperature of the air discharged into the vehicle by adjusting the amount of the mixing of the cold air passing through the evaporator 104 and the warm air passing through the heater core 120.

The flow control valve 150, the valve body 151 for connecting the cooling water pipe 161 of the engine 160 and the inlet and outlet pipes (120a, 120b) of the heater core 120 in communication with the, Is installed in the valve body 151 is made of a control valve 156 to control or block the flow rate of the cooling water flowing through the interior of the valve body 151.

At this time, two coolant pipes 161 connected to the engine 160 side are connected to one end of the valve body 151, and the inlet and outlet pipes 120a and 120b of the heater core 120 are connected to the other end thereof. Connected with.

In addition, the inlet passage 152 and the outlet of the inlet and outlet pipes 120a and 120b of the heater core 120 and the coolant pipe 161 of the engine 160 are respectively communicated with each other inside the valve body 151. A passage 153, a bypass passage 154 through which the coolant supplied from the engine 160 bypasses the heater core 120, and inlet and outlet pipes 120a and 120b of the heater core 120. The communication paths 155 communicating with each other are formed.

In addition, the control valve 156 is a first valve 157 for opening and closing the inlet passage 152 and the bypass passage 154, and a second valve for opening and closing the outlet passage 153 and the communication passage 155. It consists of 158.

Accordingly, in the heating mode, as shown in FIG. 3, the first and second valves 157 and 158 open the inlet and outlet passages 152 and 153 and close the bypass passage 154 and the communication passage 155. After the coolant supplied from the engine 160 circulates through the heater core 120, the coolant is returned to the engine 160 again.

In the cooling mode, as illustrated in FIG. 2, the first and second valves 157 and 158 close the inlet and outlet passages 152 and 153 and open the bypass passage 154 and the communication passage 155. Cooling water circulation line circulating the heater core 120 from the 160 is blocked.

As a result, the coolant supplied from the engine 160 is u-turned through the bypass passage 154 to be returned to the engine 160 again, and the coolant in the heater core 120 is stagnant.

The stagnant coolant in the heater core 120 circulates itself upon operation of the circulation pump 170 to be described below. That is, when the circulation pump 170 is operated, an inlet pipe 120a-> heater core 120-> outlet pipe 120b-> storage cooling heat exchanger 140-> flow control valve 150 of the communication path ( 155)-> circulating pump 170 is to be circulated.

Meanwhile, the first and second valves 157 and 158 are rotatably operated by an actuator (not shown) installed on the outside of the valve body 151 and the inlet and outlet passages 152 and 153 and the bypass passage 154. And the communication path 155 is opened and closed.

On the cooling water circulation line that circulates the heater core 120 from the engine 160, a predetermined amount of cooling water is stored, and heat storage cooling for mutually heat-exchanging the cooling water and the refrigerant circulating through the evaporator 104 (air conditioner system). The exchanger 140 is installed to accumulate or accumulate the cooling water in the cold storage heat exchanger 140 in the cooling and heating mode, and to cool down the coolant stored in the cold storage heat exchanger 140 when the engine 160 is stopped. By circulating to the core 120, the discharge air temperature of the air conditioning case 110 is prevented from changing rapidly.

Of course, in the cooling and heating mode, not only the cooling water in the cold storage heat exchanger 140 but also the cooling water in the heater core 120 is stored or stored.

In the present invention, by using the cold storage heat exchanger (140), the storage capacity or heat storage capacity is greatly increased, and thus the cooling and heating capacity can be sustained for a long time when the engine 160 is stopped. Cooling and heating performance will be improved.

In addition, by cooling the cooling water with the refrigerant through the cold storage heat exchanger (140), the cooling water is rapidly cooled, thereby improving the rapid cooling efficiency.

At this time, when the storage cooling effect is improved, it provides a faster storage cooling effect to the occupant to improve the cooling performance.

In addition, the cold storage heat exchanger 140 is installed on the inlet pipe 120a or the outlet pipe 120b of the heater core 120 to circulate the coolant circulation line circulating the heater core 120 from the engine 160. It is preferable to be arranged in series with the heater core 120 on the.

When the cold storage heat exchanger 140 is disposed in series with the heater core 120, the pipe structure and the route of the pipe for connecting the heater core 120 and the cold storage heat exchanger 140 are simplified, so that the whole The structure is simple, thereby reducing the number of parts and the cost, as well as the assemblability.

In addition, when the accumulator heat exchanger 140 is disposed in series with the heater core 120, the circulation direction of the coolant may be adjusted during the refrigeration and heat storage with one of the flow control valves 150 without additionally configuring a separate valve. Therefore, the number of parts and cost can be reduced.

In addition, since the cold storage heat exchanger (140) and the heater core (120) are disposed in series, the flow resistance of the cooling water may be reduced, thereby improving the cold storage or heat storage performance.

And, the cold storage heat exchanger 140 is preferably connected to the outlet pipe (120b) of the heater core (120). That is, since the outlet pipe 120b connected to the upper tank 121 of the heater core 120 is disposed adjacent to the refrigerant pipes 105a and 105b of the evaporator 104, the evaporator 104 of the evaporator 104 to be described below will be described. When the outlet refrigerant pipe 105b is connected to the cold storage heat exchanger 140, the length (path) of the outlet refrigerant pipe 105b may be minimized.

In addition, since the inlet and outlet pipes 120a and 120b of the heater core 120 are disposed on the outer surface of the air conditioning case 110, the accumulator heat exchanger is connected to the outlet pipe 120b of the heater core 120. 140 is also disposed on the outer surface of the air conditioning case 110.

The cold storage heat exchanger (140) is a plate heat exchanger formed by stacking a plurality of plates (141). Each of the plates (141) includes a cooling water passage (142) and the cooling water passage (142) through which the cooling water circulates. Refrigerant passages through which the refrigerant circulates are formed so as to cross each other.

That is, the cooling water passage 142 is formed in the inside of each plate 141 so that the cooling water flowing along the outlet pipe 120b of the heater core 120 flows and the cooling water of each plate 141. The refrigerant passage is formed on the passage 142 so as to intersect at right angles.

In the refrigerant passage, the refrigerant flowing along the refrigerant pipe 105b on the outlet side of the evaporator 104 flows into the refrigerant passage.

Therefore, the cooling water passage 142 and the refrigerant passage are formed to intersect in the cold storage heat exchanger 140 to exchange heat with the refrigerant flowing through the refrigerant passage and the cooling water flowing through the cooling water passage 142. Heat exchange performance is improved.

In addition, the cooling water passage 142 is connected in series communication with the inlet pipe (120a) or outlet pipe (120b) of the heater core 120, the cooling water passage 142 is the heater core ( It is connected in series with the outlet pipe (120b) of 120.

In addition, the refrigerant passage is connected in series with the outlet refrigerant pipe 105b of the evaporator 104. At this time, the outlet side refrigerant pipe 105b of the evaporator 104 is installed to be connected to the refrigerant passage of the heat storage heat exchanger 140, thereby preventing the cooling performance of the evaporator 104 in the cooling mode. have.

In addition, an upper communication hole 141a and a lower communication hole 141b are formed at upper and lower portions of each plate 141, and when the plates 141 are stacked, an upper portion of the cold storage heat exchanger 140 is provided. And an upper tank 142a and a lower tank 142b communicating with the cooling water passages 142 in the plates 141 to form a cooling water storage space.

As such, by forming the upper tank 142a and the lower tank 142b in a predetermined space in the heat storage heat exchanger 140, the cooling water storage space is increased, thereby greatly increasing the heat storage capacity or heat storage capacity.

In addition, the refrigerant passage includes an inlet refrigerant passage 143a and an outlet refrigerant passage 143b which are formed to be spaced apart from each other between the upper tank 142a and the lower tank 142b.

At this time, the inlet side refrigerant passage 143a and the outlet side refrigerant passage 143b are each formed in plural. That is, the plurality of inlet-side refrigerant passages 143a and the plurality of outlet-side refrigerant passages 143b cross each other on the cooling water passages 142 of the plates 141, thereby cooling water of the plates 141. The coolant flowing along the passage 142 flows between the plurality of inlet side refrigerant passages 143a and the plurality of outlet side refrigerant passages 143b, respectively, to further improve heat exchange performance between the cooling water and the refrigerant.

Meanwhile, a bending part 141d is formed at the edge of each plate 141 to form the cooling water passage 142 therein while being joined with another adjacent plate 141.

The inlet pipe 120a or the outlet pipe 120b of the heater core 120 is connected to the upper and lower tanks 142a and 142b at an outermost side of the stacked plurality of plates 141. The first end plate 144 having the connection hole 144a and the lower connection hole 144b is installed.

At this time, it is preferable that the outlet pipe 120b of the heater core 120 is connected to the first end plate 144.

In addition, the outermost side of the stacked plurality of plate 141 is connected to the upper side so that the outlet refrigerant pipe 105b of the evaporator 104 is connected in series with the inlet and outlet side refrigerant passages 143a and 143b. The second end plate 145 having the chamber 145b and the lower connection chamber 145a is installed.

At this time, the lower connection chamber 145a connects the plurality of inlet side refrigerant passages 143a with the outlet side refrigerant pipe 105b of the evaporator 104, and the upper connection chamber 145b includes the plurality of connection chambers. The outlet side refrigerant passage 143b is connected to the outlet side refrigerant pipe 105b of the evaporator 104.

In addition, the first end plate 144 is provided with a connection refrigerant passage 143c for connecting the inlet refrigerant passage 143a and the outlet refrigerant passage 143b in communication. Accordingly, the refrigerant flowing along the outlet side refrigerant pipe 105b of the evaporator 104 flows into the inlet side refrigerant passage 143a and flows thereafter, making a U-turn through the connection refrigerant passage 143c to the outlet side. It flows along the refrigerant passage 143b.

Further, an intermediate tank 142c is further provided between the inlet refrigerant passage 143a and the outlet refrigerant passage 143b to communicate the cooling water passages 142 in the plates 141 to form a cooling water storage space. do. Thus, the cold storage heat exchanger 140 is provided with an upper tank 142a and a lower tank 142b in the upper and lower portions, and an intermediate tank 142c in the middle to secure the cooling water storage space to the maximum.

Meanwhile, an intermediate communication hole 141c is formed between the inlet and outlet side refrigerant passages 143a and 143b of each plate 141 to form the intermediate tank 142c.

In addition, when the flow rate control valve 150 blocks the coolant supplied to the heater core 120 on the inlet pipe 120a or the outlet pipe 120b of the heater core 120, the inside of the cold storage heat exchanger 140. The circulation pump 170 for circulating the cooling water to the heater core 120 is installed.

When the flow control valve 150 blocks the coolant supplied to the heater core 120, a closed circuit is disconnected from the engine 160 and circulates only the heater core 120 and the cold storage heat exchanger 140. The circulation pump 170 circulates the cooling water along this closed circuit.

That is, in the cooling mode, the flow control valve 150 closes the inlet and outlet passages 152 and 153 of the valve body 151, so that the coolant in the heater core 120 and the cold storage heat exchanger 140 is stagnant. Becomes Due to this, since the cold air passing through the evaporator 104 passes through the heater core 120 and cools only the coolant in the heater core 120 coldly, the heat storage heat exchanger 140 and the heater through the circulation pump 170. By circulating the coolant between the cores 120, the coolant in the heater core 120 and the cold storage heat exchanger 140 is cooled.

In addition, the coolant in the cold storage heat exchanger 140 and the low temperature low pressure refrigerant flowing through the refrigerant pipe 105b of the outlet side of the evaporator 104 exchange heat with each other, whereby the coolant in the cold storage heat exchanger 140 is more rapidly. The heat storage efficiency is reduced, and the heat storage efficiency is improved.

On the other hand, since the cold storage heat exchanger 140 is installed on the outlet pipe 120b of the heater core 120, the circulation pump 170 is connected and installed on the inlet pipe 120a of the heater core 120. It is desirable to be.

In addition, a bypass passage 131 is formed in the upper portion of the heater core 120 such that some of the air passing through the evaporator 104 bypasses the heater core 120 in the air conditioning case 110. In the bypass passage 131, a bypass door 130 is installed to adjust the opening degree.

The bypass door 130 selectively opens and closes the bypass passage 131 according to the condition of the vehicle.

That is, when the bypass passage 131 is opened through the bypass door 130 in the initial cooling mode, some of the air cooled in the evaporator 104 passes through the heater core 120, but some of the bypass passage ( By bypassing the heater core 120 through 131, the maximum cooling speed can be improved.

The bypass door 130 opens the bypass passage 131 only in the cooling mode while the engine 160 is operating, and the engine 160 in the heating mode and the cooling and heating mode while the engine 160 is operating. At the stop, the bypass passage 131 is closed.

In addition, the bypass door 130 may be configured as a center pivot type, as shown in the figure, and may be configured as a dome type, although not shown in the figure.

Hereinafter, the operation of the air conditioner for a vehicle according to the present invention will be described.

end. In the cooling mode (see Fig. 9),

In the cooling mode, the first and second valves 157 and 158 of the flow control valve 150 close the inlet and outlet passages 152 and 153 of the valve body 151 and are supplied from the engine 160 to the heater core 120. The coolant is completely blocked, and the coolant supplied from the engine 160 is u-turned through the bypass passage 154 in the valve body 151 to return to the engine 160 again.

In addition, the bypass door 130 opens the bypass passage 131, and the circulation pump 170 operates.

Therefore, the air introduced through the air inlet 111 of the air conditioning case 110 by the blower is cooled in the process of passing through the evaporator 104, some of the cold air through the bypass passage 131 Bypassing the heater core 120, a portion passes through the heater core 120, and is discharged into the vehicle interior through the air discharge port opened by the mode door 113 in accordance with the air conditioning mode to cool.

In the process described above, the cooled cold air passing through the evaporator 104 passes through the heater core 120 to cool the cooling water in the heater core 120, so that the cooling water becomes cold.

At this time, the cold cooling water in the heater core 120 is circulated to the cooling water passage 142 in the cold storage heat exchanger 140 along the circulation path as shown in FIG. 9 by the circulation pump 170. The coolant stored in 140 is also cooled to accumulate.

In addition, since the refrigerant pipe 105b of the outlet side of the evaporator 104 is connected to the refrigerant passage of the cold storage heat exchanger 140, the cold refrigerant flowing through the outlet refrigerant pipe 105 of the evaporator 104 and As the cooling water in the cold storage heat exchanger 140 exchanges heat with each other, the cooling water in the cold storage heat exchanger 140 cools more quickly, thereby enabling rapid cooling and improving the storage efficiency.

I. When the engine stops during the cooling mode (see FIG. 10),

When the engine 160 of the vehicle is stopped while driving in the cooling mode or when the vehicle stops, the compressor 101 is also stopped and the air conditioner is turned off. At this time, the temperature of the evaporator 104 rises, so that the evaporator 104 stops. The temperature of the air passing through) may also rise sharply, but in this case, as shown in FIG. 10, the bypass passage 131 is closed through the bypass door 130 so that the entire air passing through the evaporator 104 is heated. It passes through the core 120.

At this time, the circulation pump 170 continues to operate to circulate the cold cooling water stored in the cold storage heat exchanger 140 to the heater core 120.

Therefore, since the temperature of the air rising while passing through the evaporator 104 is lowered again by the cold cooling water in the heater core 120, it is possible to prevent the temperature of the air discharged into the vehicle interior from rising sharply, thereby occupying the occupant. You can prevent the discomfort of.

All. In heating mode (see Fig. 11),

In the heating mode, the first and second valves 157 and 158 of the flow control valve 150 open the inlet and outlet passages 152 and 153 of the valve body 151 so that the hot coolant heated from the engine 160 is heated by the heater core ( After circulating 120, the engine returns to the engine 160, and the bypass door 130 closes the bypass passage 131.

In addition, the circulation pump 170 is stopped in the heating mode while the engine 160 is operating. At this time, the coolant circulates through the heater core 120 by the water pump (not shown) of the engine 160.

Accordingly, air introduced through the air inlet 111 of the air conditioning case 110 by the blower passes through the evaporator 104, and the air passing through the evaporator 104 passes through the heater core 120. After being heated through heat exchange with the heater core 120 in the passing process, it is discharged into the vehicle interior through the air discharge port opened by the mode door 113 in accordance with the air conditioning mode is heated.

In the above process, the hot cooling water heated and supplied from the engine 160 circulates not only to the heater core 120 but also to the cooling water passage 142 in the cold storage heat exchanger 140, and then returns to the engine 160. The cooling water in 140 becomes hot and is regenerated.

la. When the engine 160 is stopped during the heating mode (see FIG. 12),

When the engine 160 of the vehicle is stopped while waiting for a signal or stops while driving in a heating mode, the supply of coolant is also stopped from the engine 160 side. At this time, since the temperature of the heater core 120 decreases, the heater Although the temperature of the air passing through the core 120 may also drop rapidly, in this case, as shown in FIG. 12, the circulation pump 170 is operated to remain hot even after the engine 160 stops. The side coolant and the hot coolant stored in the cold storage heat exchanger 140 are circulated to the heater core 120.

Therefore, even when the engine 160 is stopped in the heating mode, the temperature of the air passing through the heater core 120 because hot coolant stored in the engine 160 and the cold storage heat exchanger 140 circulates to the heater core 120. Since it is discharged into the vehicle interior without a large change for a certain time to continue heating, it is possible to prevent the temperature of the air discharged to the interior of the vehicle to drop sharply, thereby preventing the discomfort of the occupants.

As such, when the engine 160 is stopped in the heating mode, not only the hot coolant in the heat storage heat exchanger 140 but also the coolant of the engine 160 remaining hot may further improve heating performance.

As described above, in the present invention, by storing a predetermined amount of the cooling water on the inlet pipe (120a) or outlet pipe (120b) of the heater core 120 and at the same time by installing a cold storage heat exchanger 140 for heat exchange between the cooling water and the refrigerant Although the configuration in which the heat storage heat exchanger 140 is connected to the heater core 120 in series is described only when the semi-center type air conditioner is applied, the present invention is not limited thereto. The center mounting type air conditioner and the three-piece type are not limited thereto. The same method can be applied to all air conditioners such as air conditioners, independent left and right controlled air conditioners, and the same effect can be obtained.

100: air conditioner 101: compressor
102: condenser 103: expansion valve
104: evaporator 105, 105a, 105b: refrigerant pipe
110: air conditioning case 111: air inlet
112a: De-Frost vent 112b: Face vent
112c, 112d: floor vent 113: mode door
120: heater core 120a: inlet pipe
120b: exit pipe 130: bypass door
131: bypass passage 140: cold storage heat exchanger
141: plate 141a: upper communication hole
141b: lower communication hole 141c: intermediate communication hole
142: cooling water passage 142a: upper tank
142b: lower tank 142c: intermediate tank
143a: inlet refrigerant passage 143b: outlet refrigerant passage
143c: connecting refrigerant passage 144: first end plate
144a: upper connection hole 144b: lower connection hole
145: second end plate 145a: lower connection chamber
145b: upper connection chamber
150: flow control valve 151: valve body
152: entrance passage 153: exit passage
154: bypass passage 155: communication passage
156: control valve 160: engine
161: cooling water pipe 170: circulation pump

Claims (10)

An air conditioner case 110, an evaporator 104 and a heater core 120 that are sequentially installed in an air flow direction inside the air conditioning case 110, and an inlet and an outlet pipe 120a of the heater core 120. And a flow rate control valve 150 installed between the cooling water pipe 161 of the engine 160 and controlling the flow rate of the cooling water circulating from the engine 160 to the heater core 120. 120) In the vehicle air conditioner using the cooling water inside as the heat storage or heat storage material,
On the cooling water circulation line circulating the heater core 120 from the engine 160, a storage cooling heat exchanger 140 for storing a predetermined amount of the cooling water and heat-exchanging the refrigerant circulating the cooling water and the evaporator is installed.
The accumulator heat exchanger (140) is installed on an inlet pipe (120a) or an outlet pipe (120b) of the heater core 120, the vehicle air conditioner, characterized in that connected in series with the heater core (120). The method of claim 1,
The cold storage heat exchanger (140), the vehicle air conditioner, characterized in that installed on the outer surface of the air conditioning case (110). The method of claim 1,
The cold storage heat exchanger 140 is formed by stacking a plurality of plates 141, and intersects with the cooling water passage 142 and the cooling water passage 142 through which the cooling water circulates inside each plate 141. Refrigerant passages through which the refrigerant is circulated are formed to partition each other,
The cooling water passage 142 is connected in series with the inlet pipe (120a) or outlet pipe (120b) of the heater core 120,
The refrigerant passage is a vehicle air conditioner, characterized in that connected in series with the refrigerant pipe (105b) connected to the evaporator (104). The method of claim 3, wherein
Upper and lower tanks 142a and 142b are formed at upper and lower portions of the cold storage heat exchanger 140 to communicate the cooling water passages 142 in the plates 141 to form a cooling water storage space.
The refrigerant passage is composed of an inlet refrigerant passage 143a and an outlet refrigerant passage 143b which are formed to be spaced apart from each other between the upper tank 142a and the lower tank 142b.
An upper connection hole is formed at the outermost side of the stacked plurality of plates 141 so that the inlet pipe 120a or the outlet pipe 120b of the heater core 120 is connected to the upper and lower tanks 142a and 142b. A first end plate 144 having a 144a and a lower connection hole 144b formed therein;
The upper connection chamber 145b is connected to the outermost side of the plurality of stacked plates 141 so that the refrigerant pipe 105b connected to the evaporator 104 is connected to the inlet and outlet refrigerant passages 143a and 143b. Vehicle air conditioning apparatus, characterized in that the second end plate 145 is formed with a lower connection chamber (145a). 5. The method of claim 4,
The first end plate (144) is a vehicle air conditioner, characterized in that the connection refrigerant passage (143c) for connecting the inlet-side refrigerant passage (143a) and the outlet-side refrigerant passage (143b) in communication. 5. The method of claim 4,
An intermediate tank 142c is further provided between the inlet refrigerant passage 143a and the outlet refrigerant passage 143b to communicate the cooling water passages 142 in the plates 141 to form a cooling water storage space. Vehicle air conditioner characterized in that. The method of claim 3, wherein
Refrigerant pipe (105b) connected to the refrigerant passage of the cold storage heat exchanger (140) is a vehicle air conditioning apparatus, characterized in that the refrigerant pipe (105b) on the outlet side of the evaporator (104). The method of claim 1,
When the flow rate control valve 150 blocks the coolant supplied to the heater core 120 on the inlet pipe 120a or the outlet pipe 120b of the heater core 120, the coolant in the heat storage heat exchanger 140 is removed. Vehicle air conditioning apparatus, characterized in that the circulation pump 170 is circulated to the heater core 120 is installed. The method of claim 8,
The cold storage heat exchanger 140 is connected to the outlet pipe 120b of the heater core 120 and the circulation pump 170 is connected to the inlet pipe 120a of the heater core 120. Vehicle air conditioner characterized in that. The method of claim 1,
The flow control valve 150,
A valve body 151 connecting the cooling water pipe 161 of the engine 160 and the inlet and outlet pipes 120a and 120b of the heater core 120 to communicate with each other;
Is installed inside the valve body 151, the air conditioning apparatus for a vehicle, characterized in that consisting of a control valve 156 for controlling or blocking the flow rate of the cooling water flowing in the valve body (151).

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