KR20200040102A - Air conditioner for vehicle - Google Patents

Abstract

Disclosed is an air conditioning system for a vehicle capable of preventing damage due to heat by optimizing the arrangement of the heating portion of the electric heater in the two-layer air conditioning system, and improving heating performance. The vehicle air conditioner is a vehicle air conditioner that separates the inside and the outside air and the inside of the air conditioner case is divided into an upper flow path and a lower flow path by a partition wall. It includes an electric heater that is provided, the partition wall is arranged an electric heater to face the heat dissipation unit.

Description

Air conditioning system for vehicles {AIR CONDITIONER FOR VEHICLE}

The present invention relates to a vehicle air conditioning apparatus, and more particularly, to a vehicle air conditioning apparatus having an electric heater such as a PTC heater that heats air by application of power.

In general, a vehicle air conditioner is a device for cooling or heating the vehicle interior by heating or cooling in the process of introducing air outside the vehicle into the vehicle interior or circulating air in the vehicle interior. The air conditioner for a vehicle is provided with an evaporator for cooling and a heater core for heating inside the air conditioning case, and selectively blows air cooled or heated by the evaporator or the heater core to each part of the vehicle interior using a door. do.

In particular, a two-layer air conditioner has been developed in which the inside of the air conditioning case is separated into an upper flow path and a lower flow path in order to maintain high heating performance while securing defogging performance during heating. In order to remove frost frost on the window during winter heating driving, low-humidity cold outside air is effective, but it results in a decrease in indoor temperature.

The two-layer air conditioning system effectively removes frost by using fresh, low-humidity outside air supplied to the top by realizing the inside and outside air two-layer air flow that supplies outside air to the upper part of the vehicle and circulates the inner air to the lower part for defogging during heating. At the same time, it provides fresh outside air to passengers and supplies warm bets to the bottom to maintain high heating performance.

1 is a cross-sectional view showing a conventional two-layer air conditioner for a vehicle. Referring to FIG. 1, a conventional two-layer vehicle air conditioner 1 includes an air conditioner case 10. The air-conditioning case 10 is formed with an air flow path of a certain shape therein, and the air flow path is divided into an upper flow path 14b and a lower flow path 14a by a separation wall 14c. On the outlet side of the air conditioning case 10, a plurality of air outlets are formed. The air outlet is composed of a defrost vent (16), a face vent (17), a front seat floor vent (18), and a rear seat floor vent (19).

The inlet side of the air conditioning case 10 is provided with a blower unit 5, and an evaporator 2 and a heater core 3 are provided at regular intervals in the air flow path of the air conditioning case 10. External air flows in and flows into the upper flow path 14b, and internal air flows in and flows into the lower flow path 14a. The upper passage 14b is provided with a first temper door 11 for adjusting the amount of air passing through the heater core 3 and the air bypassing the heater core 3, and the lower passage 14a has a heater core. (3) is provided with a second temp door 12 that controls the amount of air passing through and the heater core 3 bypassing.

The air discharge port is provided with a defrost door (13a) and a face door (13b) for controlling the amount of air discharged to the defrost vent (16) and the face vent (17), respectively. The air discharge port is provided with a floor door 13c for adjusting the amount of air discharged to the front seat floor vent 18 and a rear seat mode door 13d for adjusting the amount of air discharged to the rear seat floor vent 19. A bypass door 13e that controls communication between the upper flow path 14b and the lower flow path 14a is provided, so that the bet of the lower flow path 14a can flow to the upper flow path 14b.

Meanwhile, in addition to a heater core using a cooling water heat source of the engine, the vehicle air conditioner further includes an electric heater such as a PTC heater (Positive Temperature Cofficient Heater) that heats the air passing through it by applying power. can do. The electrothermal heater comprises a heating unit made of a PTC element, a heat dissipation unit that emits heat by contacting the heating unit, a terminal unit, and a housing surrounding and protecting them. In the conventional electric heater, it is necessary to optimize the arrangement of the heat generating portion and the heat dissipation portion.

Republic of Korea Registered Patent No. 10-1179593 (2012.08.29)

In order to solve such a conventional problem, the present invention provides a vehicle air conditioning system capable of preventing heat damage and improving heating performance by optimizing the arrangement of the heating unit of the electric heater in the two-layer air conditioning system.

A vehicle air conditioner according to the present invention is a vehicle air conditioner that separates in and out air from inside and outside, and the inside of the air conditioner case is divided into an upper flow path and a lower flow path by a separation wall. It includes an electrothermal heater having a heat dissipation unit for heat exchange, the partition wall is arranged an electrothermal heater to face the heat dissipation unit.

In the above, the heating portion of the electric heater is spaced apart from the separation wall in the height direction.

In the above, the heating portion of the electric heater is composed of an even number.

In the above, the heating portion of the electric heater is symmetrically arranged with respect to the separation wall in the height direction.

In the above, the heating part of the electric heater is composed of an odd number, and is arranged asymmetrically with respect to the separation wall in the height direction.

In the above, the heating unit of the electric heater is configured in a larger number than the upper portion based on the separation wall.

In the above, the heat transfer heater is installed such that the intermediate portion is positioned on the separation wall in the height direction.

In the above, a heater core for heating air by a cooling water heat source is provided inside the air conditioning case, and the electrothermal heater is integrally coupled downstream of the heater core in the air flow direction.

In the above, the heater core includes: a first header tank and a second header tank which are spaced apart at a predetermined distance and arranged side by side; A cooling water pipe provided in the first header tank or the second header tank, through which cooling water flows in and out; A plurality of tubes having both ends fixed to the first header tank and the second header tank to form a cooling water flow path; Fins interposed between the tubes; It includes a pair of side plates supporting both sides of the assembly of the tube and the fin, the electrothermal heater has a terminal portion for applying power to the heat generating portion, and the heat dissipating portion is formed in a plate shape to fix the heat generating portion, and the heat dissipation One end portion of the portion and the heating portion is supported by the housing.

In the above, a heater core for heating air by a cooling water heat source is provided inside the air conditioning case, and the heat transfer heater is spaced apart downstream of the heater core in the air flow direction, and a separation wall disposed between the heater core and the heat transfer heater Is disposed at the corresponding position of the heat dissipation unit.

The air conditioning system for a vehicle according to the present invention optimizes the heating element arrangement of the electric heater, thereby reducing the risk of thermal deformation and increasing safety as the heat is prevented from damage, and improving the heating performance by increasing the heat exchange efficiency of the heating element. By increasing the discharge temperature to the rider can increase the satisfaction of the passenger.

1 is a cross-sectional view showing a conventional two-layer air conditioning system for a vehicle,
Figure 2 is a cross-sectional view showing a vehicle air conditioning apparatus according to an embodiment of the present invention,
3 is an exploded perspective view of a heater core and an electric heater according to an embodiment of the present invention,
4 is a perspective view showing a state in which the assembly of the heater core and the electric heater according to an embodiment of the present invention is separated from the separation wall,
5 is a cross-sectional view showing the installation state of the electric heater and the separation wall according to an embodiment of the present invention,
6 to 8 is a cross-sectional view showing the installation state of the heating heater and the separation wall according to the modification of FIG. 5,
9 is a cross-sectional view showing a vehicle air conditioner according to another embodiment of the present invention,
10 is a cross-sectional view showing an installation state of an electric heater and a separation wall according to another embodiment of the present invention.

Hereinafter, the technical configuration of the vehicle air conditioner according to the accompanying drawings will be described in detail.

Figure 2 is a cross-sectional view showing a vehicle air conditioning apparatus according to an embodiment of the present invention, Figure 3 is an exploded perspective view of a heater core and an electric heater according to an embodiment of the present invention, Figure 4 is an embodiment of the present invention It is a perspective view showing a state in which the assembly of the heater core and the heating heater according to the separation wall, and Figure 5 is a cross-sectional view showing the installation state of the heating heater and the separation wall according to an embodiment of the present invention.

2 to 5, the vehicle air conditioner 100 according to an embodiment of the present invention is a two-layer air conditioner for supplying external air to the upper portion and circulating the inner air to the lower portion for defogging during heating. A case 110 is provided.

The air-conditioning case 110 is formed with an air flow path 114 of a predetermined shape therein, and the air flow path 114 includes an upper flow path 114b and a lower flow path 114a partitioned by the separation wall 140. The inside air flows in and flows into the lower flow path 114a, and the outside air flows in and flows in the upper flow path 114b. That is, the air-conditioning case 110 separates the inside and the outside air, and the inside of the air-conditioning case 110 is divided into the upper flow path 114b and the lower flow path 114a by the separation wall 140.

The lower flow path 114a is a bet flow path through which the bet introduced through the bet inlet flows, and is located at a lower portion of the upper and lower spaces partitioned by the separation wall 140. The upper flow path 114b is an external air flow path through which the external air flowing through the outdoor air inlet flows, and is located at an upper portion of the upper and lower spaces partitioned by the separation wall 140.

A plurality of air outlets are formed at the outlet side of the air conditioning case 110. The air outlet is composed of a defrost vent 116, a face vent 117, a front seat floor vent 118, and a rear seat floor vent 119.

The inlet side of the air conditioning case 110 is provided with a blower unit 105, and the blower unit 105 is connected to an air inlet of the air conditioning case 110. The air inlets are the inlets of the lower flow passage 114a and the upper flow passage 114b. The air flow path of the air conditioning case 110 is provided with a plurality of heat exchangers that exchange heat with air passing therethrough. That is, the inside of the air conditioning case 110 is provided with an evaporator 102 as a heat exchanger for cooling and a heater core 120 as a heat exchanger for heating at regular intervals from the air inlet 114 side.

The air flow path of the air conditioning case 110 is divided into the upper flow path 114b and the lower flow path 114a through the separation wall 140 to the downstream side of the evaporator 102. The outside air flowing into the upper flow path 114b is discharged to at least one of the defrost vent 116, the face vent 117, and the electro-floor floor vent 118 after heat exchange with the heat exchanger. The inside air flowing into the lower flow path 114a may be discharged to the rear seat floor vent 119 after heat exchange with the heat exchanger or to the upper flow path 114b to be discharged to the vehicle front seat side.

The upper flow path 114b is provided with a first temp door 111 that controls the amount of air passing through the heater core 120 and the air bypassing the heater core 120, and the lower flow path 114a has a heater core. A second temp door 112 is provided to control the amount of air passing through the air 120 and the air bypassing the heater core 120.

The air outlet of the air conditioning case 110 is provided with a defrost door 116a and a defrost door 113a and a face door 113b that adjust the amount of air toward the face vent 117. In addition, the air outlet is provided with a floor door 113c for adjusting the amount of air toward the front seat floor vent 118, and a rear seat mode door 113d for adjusting the amount of air toward the rear seat floor vent 119. In addition, a bypass door 113e for adjusting the opening degree of the communication flow path between the upper flow path 114b and the lower flow path 114a is provided, so that the bet of the lower flow path 114a can flow to the upper flow path 114b.

The vehicle air conditioner 100 includes an electric heater 130. The heating heater 130 is provided inside the air conditioning case 110 and heats air by heating by application of power. The electric heater 130 may be made of a PTC heater (Positive Temperature Cofficient Heater). The electric heater 130 includes a terminal portion 132, a heating portion 138, a heat radiating portion 131, and a housing.

The terminal unit 132 is for receiving power, and a plurality of heating units 138 are spaced apart in the height direction, and heat is generated by the power applied to the terminal unit 132. The heating unit 138 includes an electrode and may be formed of a heating tube using a PTC element. The heat dissipation unit 131 is formed in a plate shape, and fixes the heat generation unit 138 and exchanges heat generated by the heat generation unit 138 with air passing therethrough. The housing supports one end of the heat dissipation unit 131 and the heat generation unit 138.

The heater core 120 is provided inside the air conditioning case 110 and heats air by a cooling water heat source. The heater core 120 includes a first header tank 125 and a second header tank 126, a cooling water pipe 121, a tube 123, a fin 128, and a side plate 122. .

The first header tank 125 and the second header tank 126 are provided side by side at a predetermined distance in the height direction. One of the first header tank 125 and the second header tank 126 is provided with a cooling water pipe 121 for introducing cooling water, and the other has a cooling water pipe 121 for discharging cooling water.

The tube 123 is fixed to both ends of the first header tank 125 and the second header tank 126 to form a cooling water flow path, and a plurality of tubes are provided side by side in the width direction. The fin 128 is interposed between the plurality of tubes 123, thereby improving heat exchange performance by exchanging heat with air passing therethrough. The side plate 122 consists of a pair and supports both sides of the assembly of the tube 123 and the fin 128.

The electric heater 130 is integrally coupled downstream of the heater core 120 in the air flow direction. That is, both ends of the heat dissipation part 131 of the electric heater are slidingly inserted into the first and second header tanks 125 and 126 of the heater core 120 so that the heater core 120 and the electric heater 130 face each other and are in contact with each other. (Combo) A PTC type heat exchanger assembly can be constructed.

Therefore, as the entire air passing through the heater core 120 passes through the heat transfer heater 130 and heat exchanges, thermal efficiency is increased and the number of assembly processes can be reduced by combining one heat exchanger assembly into the air conditioning case. In this embodiment, a combo PTC type heat exchanger for heating is applied, but it can also be implemented as a structure in which a heater core and an electric heater are separated or a structure in which only an electric heater is provided.

The heat transfer heater 130 is installed such that the middle portion is positioned on the separation wall 140 in the height direction. That is, the heat transfer heater 130 is installed over the upper flow path 14b and the lower flow path 14a, and the separation wall 140 is located in the middle portion in the height direction of the heat transfer heater 130. Therefore, it is possible to uniformly use the heat transfer heater 130 in each flow path.

The separation wall 140 is provided with a heat transfer heater 130 to face the heat dissipation unit 131. That is, the heating unit 138 of the heating heater 130 is spaced apart from the separation wall 140 in the height direction. As such, through the configuration that the separation wall 140 of the air conditioning case 110 faces the heat dissipation unit 131 of the heat transfer heater 130 and is spaced apart from the heat generation unit 138, the high temperature heat generation unit 138 The heating performance can be expected to be improved by preventing thermal damage of the separation wall 140 and increasing the heat exchange efficiency of the heating unit 138.

As a first structure for separating the heating portion 138 from the separation wall 140 in the height direction, the heating portion 138 of the electric heater 130 is composed of an even number. In this case, the heating portion 138 of the heating heater 130 is disposed symmetrically with respect to the separation wall 140 in the height direction.

In order to uniformly arrange the upper and lower temperature, when the heating unit 138 is formed in an odd number, and when the heating unit 138 is symmetrically configured in the height direction, in order to satisfy both of these cases, inevitably, the separation wall ( 140) should be located in the middle of the height direction of the electric heater 130. Due to this, a problem arises in that the heating portion 138 located in the middle portion in the height direction contacts the separation wall 140.

Therefore, if the heating unit 138 is configured in an even number as in the present embodiment, no heating unit 138 directly contacts the separation wall 140 and the heating unit 138 is configured to be symmetrical in the height direction. It is possible to make the temperature arrangement above and below uniform.

Meanwhile, FIGS. 6 to 8 are cross-sectional views showing an installation state of the heat transfer heater and the separation wall according to the modified example of FIG. 5.

Referring to FIG. 6, a second structure for separating the heating unit 138 from the separation wall 140 in a height direction, the heating unit 138 of the electric heater 130 is composed of an odd number, and a separation wall in the height direction It is arranged asymmetrically with respect to (140). In this case, it is preferable that the heating unit 138 of the electric heater 130 is configured to have a larger number than the upper portion based on the dividing wall 140.

The lower flow path 14a is a flow path through which the inner air flows in, and is a main use portion in which air heated by the heater core 120 and the electric heater 130 flows in the heating mode. Therefore, in order to increase the discharge temperature toward the occupant's foot, the heating part 138 of the electric heater 130 is more eccentrically disposed in the foot zone proximity region, and the temperature of the separation wall 140 is increased. The effect of preventing and improving heating performance can be achieved simultaneously.

In addition, as shown in FIG. 7, when the heating unit 138 is configured in an even number, it may be configured in two or more in the upper flow path and two in the lower flow path based on the separation wall 140. In addition, when the heating unit 138 is configured in an odd number as shown in FIG. 8, it may be composed of two in the upper flow path and three in the lower flow path based on the separation wall 140 or more.

Meanwhile, FIG. 9 is a cross-sectional view showing an air conditioning apparatus for a vehicle according to another embodiment of the present invention, and FIG. 10 is a cross-sectional view showing an installation state of an electric heater and a separation wall according to another embodiment of the present invention.

9 and 10, in the vehicle air conditioning apparatus according to another embodiment of the present invention, the heat transfer heater 130 is disposed spaced downstream of the heater core 120 in the air flow direction. In this case, the separation wall 140 disposed between the heater core 120 and the heat transfer heater 130 is disposed at a corresponding position of the heat dissipation unit 131. As described above, in addition to the structure in which the heater core and the electric heater are integrally combined, in the case of a structure in which the heater core and the electric heater are spaced apart, the separation wall 140 is disposed as the heat dissipation unit 131 is disposed at a position corresponding to the separation wall 140. ) And direct contact between the heating unit 138 is prevented to solve the damage problem by heat.

So far, the vehicle air conditioning apparatus according to the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and anyone skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope should be determined by the technical spirit of the appended claims.

100: vehicle air conditioning system
102: evaporator 110: air conditioning case
111: first temp door 112: second temp door
114a: lower flow path 114b: upper flow path
120: heater core 130: electric heater
131: heat dissipation section 138: heating section
140: partition wall

Claims (10)

In the air conditioning device for the vehicle divided into the inside and outside air and the inside of the air conditioning case 110 is divided into the upper flow path 114b and the lower flow path 114a by the separation wall 140,
It includes an electric heater 130 having a heat generating portion 138 to generate heat by the application of power and a heat dissipation portion 131 to exchange heat with air,
The dividing wall 140 is a vehicle air conditioning device in which the heat transfer heater 130 is disposed to face the heat dissipation unit 131. According to claim 1,
The heating unit 138 of the heating heater 130 is a vehicle air conditioner that is spaced apart from the separation wall 140 in the height direction. According to claim 1,
The heating unit 138 of the electric heater 130 is a vehicle air conditioning apparatus, characterized in that consisting of an even number. According to claim 3,
The heating unit 138 of the heating heater 130 is a vehicle air conditioning apparatus, characterized in that arranged symmetrically with respect to the separation wall 140 in the height direction. According to claim 1,
The heating unit 138 of the heating heater 130 is composed of an odd number, the vehicle air conditioning apparatus, characterized in that arranged asymmetrically relative to the separation wall 140 in the height direction. The method of claim 5,
The heating unit 138 of the heating heater 130 is a vehicle air conditioning device that is configured in a larger number than the upper portion based on the separation wall 140. According to claim 1,
The heating heater 130 is a vehicle air conditioner that is installed so that the intermediate portion in the height direction is located on the separation wall (140). According to claim 1,
A heater core 120 for heating air by a cooling water heat source is provided in the air conditioning case 110,
The electric heater 130 is a vehicle air conditioning unit that is integrally coupled to the downstream of the heater core 120 in the air flow direction. The method of claim 8,
The heater core 120 includes: a first header tank 125 and a second header tank 126 provided side by side at a predetermined distance; A cooling water pipe 121 provided in the first header tank 125 or the second header tank 126 to flow in and out cooling water; A plurality of tubes 123 fixed to both ends of the first header tank 125 and the second header tank 126 to form a cooling water flow path; A fin 128 interposed between the tubes 123; It includes a pair of side plates 122 supporting both sides of the assembly of the tube 123 and the pin 128,
The heating heater 130 includes a terminal portion 132 for applying power to the heating portion 138, and the heat dissipation portion 131 is formed in a plate shape to fix the heat generating portion 138, and the heat dissipation portion ( 131) and one end of the heating unit 138, the vehicle air conditioning apparatus supported by the housing. According to claim 1,
Inside the air conditioning case 110, a heater core 120 for heating air by a cooling water heat source is provided, and the heat transfer heater 130 is spaced apart downstream of the heater core 120 in the air flow direction,
The air conditioning device for a vehicle is disposed at a corresponding position of the heat dissipation unit 131, the separation wall 140 disposed between the heater core 120 and the electric heater 130.

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