KR20200124869A - Air conditioner for vehicle - Google Patents

Abstract

Disclosed is an air conditioner for a vehicle, which is able to avoid causing deformation of an air-conditioning case, and to maintain a distance between a heater core and an electric heater (or electric heater dummy) in a stable manner. The air conditioner for the vehicle comprises: an air-conditioning case which has an airflow path formed inside; a heating heat exchanger which is placed in the airflow path of the air-conditioning case, and exchanges heat with the air which passes therethrough; and a member which is placed in a downstream portion of the heating heat exchanger in the direction of airflow, and which has a plurality of penetrating holes through which the air, which has passed through the heating heat exchanger, is able to penetrate. The member with the penetrating holes includes a cover unit engaged with the air-conditioning case, and a sealing surface of the heating heat exchanger is formed on the cover unit.

Description

Vehicle air conditioning system {AIR CONDITIONER FOR VEHICLE}

The present invention relates to an air conditioner for a vehicle, and more particularly, to an air conditioner for a vehicle including a heater core that heats air by the flow of engine coolant and an electric heat heater or a pile of electric heat heaters that heat air by application of power. will be.

In general, an air conditioner for a vehicle is a device for cooling or heating a vehicle interior by heating or cooling in a process of introducing air outside a vehicle into a vehicle interior or circulating air in the vehicle interior. A vehicle air conditioner includes an evaporator for cooling and a heater core for heating, and selectively blows air cooled or heated by the evaporator or the heater core to each part of the vehicle interior.

Vehicle heaters include a heater core that uses an engine coolant heat source, as well as an electric heat heater such as a PTC heater that generates heat by applying power. The PTC heater includes a heat source part made of a PTC element, a heat dissipation part that radiates heat by contacting the heat source part, a terminal part, and a housing that surrounds and protects them.

1 is a cross-sectional view showing a conventional vehicle air conditioner. Referring to FIG. 1, a conventional vehicle air conditioning apparatus includes an air conditioning case 10. An air passage 14 of a certain shape is formed inside the air conditioning case 10, and an internal air inlet 14a and an external air inlet 14b partitioned by a separation wall 40 are formed on the inlet side of the air passage, and the outlet A plurality of air outlets are formed on the side. The air discharge port is composed of a defrost vent (16), a face vent (17), a floor vent (18) and a console vent (19).

A blower unit is provided at the inlet side of the air conditioning case 10, and the evaporator 2 and the heater core 3 are installed at a predetermined interval in the air conditioning case 10. A PTC heater 4 as an auxiliary heating heat source is installed downstream of the heater core 3. The air passage of the air conditioning case 10 is divided into an upper air passage and a lower air passage by the separation wall 40, and the air flowing into the inner air inlet 14a is introduced into the lower air passage and the outside air inlet 14b. Air flows through the upper air passage.

The upper air passage is provided with a first temp door 11 that adjusts the amount of air passing through the heater core 3 and the air bypassing, and the air passing through the heater core 3 and the bypass in the lower air passage A second temp door 12 is provided to control the amount of air. The air outlet is provided with a defrost door 21 for adjusting the opening degree of the defrost vent 16 and a face door 22 for adjusting the opening degree of the face vent 17. In addition, a floor door 23 for adjusting the opening of the floor vent 18 and a console door 24 for adjusting the opening of the console vent 19 are provided at the air outlet.

FIG. 2 is a perspective view illustrating a conventional air conditioning case in which a heater core and a PTC heater are not installed, and FIG. 3 is a perspective view illustrating a conventional air conditioning case in which a heater core and a PTC heater are installed.

2 and 3, a heater core insertion hole 31 for inserting the heater core 3 and a PTC heater insertion hole 31 for inserting the PTC heater 4 on the side of the air conditioning case 10 ( 32) is formed. The PTC heater 4 installed at the rear of the heater core 3 is spaced apart from the heater core 3 by a certain distance to prevent a decrease in air volume by reducing the ventilation resistance. Preferably, the separation distance between the heater core 3 and the PTC heater 4 is configured to be about 15 mm.

In order to separate the heater core 3 and the PTC heater 4 by a predetermined distance, the heater core insertion hole 31 and the PTC heater insertion hole 32 are formed at a predetermined distance as shown in FIG. 2, and the PTC heater insertion hole 32 ) To form a protruding tongue 35, and a groove-shaped groove that is coupled to the tongue 35 in the PTC heater cover 34. The cooling water pipe 33 is drawn out from the heater core 3 inserted into the heater core insertion hole 31.

In a conventional vehicle air conditioner, the distance between the heater core 3 and the PTC heater 4 is approximately 15 mm, and inevitably, the distance between the heater core insertion hole 31 and the PTC heater insertion hole 32 is relatively narrow. .

Accordingly, the air conditioning case portion (a) between the heater core insertion hole 31 and the PTC heater insertion hole 32 or the tongue 35 formed between the heater core insertion hole 31 and the PTC heater insertion hole 32 Deformation is likely to occur during assembly or transport, and may eventually cause air leakage. In addition, the mold of the air conditioning case for forming the heater core insertion hole 31 and the PTC heater insertion hole 32 becomes complicated, and there is a problem that the air conditioning case is easily deformed during injection molding by the mold.

In order to solve such a conventional problem, the present invention provides an air conditioner for a vehicle capable of stably maintaining a gap between a heater core and an electric heater (or a pile of electric heaters) without causing deformation of the air conditioning case.

An air conditioning apparatus for a vehicle according to the present invention includes an air conditioning case having an air flow path formed therein; A heating heat exchanger provided in the air passage of the air conditioning case and exchanging heat with the air passing through the air passage; And a member having a through hole provided downstream of the heating heat exchanger in the air flow direction and having a plurality of through holes through which air passing through the heating heat exchanger can pass, wherein the member having the through hole is an air conditioning case And a cover portion coupled to the cover portion, and a sealing surface of the heat exchanger for heating is formed on the cover portion.

In the above, the cover portion of the member having the through hole forms a pocket shape inside the surface of the air conditioning case to form the sealing surface of the heat exchanger for heating.

In the above, the cover part maintains a predetermined distance between the heat exchanger for heating and a member having a through hole.

In the above, the member having the through hole is composed of an electric heat heater or a dummy of electric heat heaters that generate heat by application of power.

In the above, a heating heat exchanger is inserted into the air conditioning case and one insertion hole for inserting a member having a through hole is formed, and a heating heat exchanger and a member having a through hole are inserted through the one insertion hole. The cover part closely supports the heat exchanger for heating.

In the above, the member having the through-hole includes a space support portion for supporting the through-hole by spaced apart from the heat exchanger for heating.

In the above, a protruding tongue is formed in one of the air conditioning case and the member having a through hole, and a groove-shaped groove coupled to the tongue is formed in the other.

In the above, the tongue or groove is formed outside the air conditioning case, which is the opposite side of the heating heat exchanger, among the circumference of one insertion hole formed in the air conditioning case.

In the above, the spacing support portion includes an extension portion extending from the cover portion for fixing the member having the through hole toward the heat exchanger for heating, and maintaining a gap between the heat exchanger for heating and the member having the through hole.

In the above, a support part is provided at an end of the extension part to support the heat exchanger for heating by bending to the inside of the air conditioning case.

In the above, a sealing member is provided at an end of the support portion in contact with the heating heat exchanger.

In the above, the support portion is vertically bent at an end of the extension portion, and a rib for supporting between the support portion and the extension portion is provided.

In the above, the heat exchanger for heating includes a heater core having a plurality of tubes forming a cooling water passage, and the support portion supports an end portion of the tube.

In the above, the member having a through hole has a body portion having a through hole, and a space portion is formed between the body portion and the sealing surface of the heating heat exchanger.

In the vehicle air conditioner according to the present invention, the tongue & groove between the heater core and the electric heater (or the electric heater dummy) cover part and the sealing surface of the heater core are unified in the electric heat heater cover part, thereby preventing deformation of the air conditioning case and preventing air leakage. Minimizes and can improve assembly.

In addition, as the cover portion of the electric heater forms a pocket shape inside the air conditioning case to form a sealing section, it is possible to reinforce the fixing force of the heater core according to the assembly sequence. In addition, it is possible to stably maintain the distance between the heater core and the electric heating heater relatively close to about 15 mm without deformation of the air conditioning case, and it is possible to reduce the manufacturing cost by simplifying the mold of the air conditioning case.

1 is a cross-sectional view showing a conventional vehicle air conditioner,
2 is a perspective view showing a conventional air conditioning case in which a heater core and a PTC heater are not installed,
3 is a perspective view showing a conventional air conditioning case in which a heater core and a PTC heater are installed,
4 is a cross-sectional view showing an air conditioning apparatus for a vehicle according to an embodiment of the present invention,
5 is a side view showing an air conditioning case in which a heater core and an electric heat heater are not installed according to an embodiment of the present invention,
Figure 6 shows that the electric heater is installed in the insertion hole of the air conditioning case in Figure 5,
7 is a diagram illustrating that a heater core is installed in the insertion hole of the air conditioning case in FIG. 6,
8 is a partially cut-away perspective view showing the interior of the air conditioning case according to an embodiment of the present invention,
9 is a cross-sectional view showing an electric heater according to an embodiment of the present invention,
10 is a cross-sectional view illustrating that an electric heater and a heater core are coupled to an air conditioning case according to an embodiment of the present invention.

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

4 is a cross-sectional view showing an air conditioning apparatus for a vehicle according to an embodiment of the present invention. Referring to FIG. 4, the vehicle air conditioner according to an embodiment of the present invention supplies outside air to the upper flow path 114b and circulates internal air to the lower flow path 114a to improve defogging performance during heating. As a laminar flow (Two-layer) type air conditioner, and includes an air conditioner case (110).

An air flow path of a certain shape is formed inside the air conditioning case 110, an air inlet is formed at the inlet side of the air flow path, and a plurality of air discharge ports are formed at the outlet side. The air outlet includes a defrost vent 116, a face vent 117, a floor vent 118, and a console vent 119. The interior of the air conditioning case 110 includes a defrost door 121 for adjusting the opening degree of the defrost vent 116, a face door 122 for adjusting the opening degree of the face vent 117, and a floor vent 118. A floor door 123 for adjusting the opening degree and a console door 124 for adjusting the opening degree of the console vent 119 are provided.

A blower unit is provided at the inlet side of the air conditioning case 110 and a heat exchanger is installed inside the air conditioning case 110. The heat exchanger performs heat exchange with air passing through it, and is composed of a heat exchanger for cooling and a heat exchanger for heating which are sequentially arranged in the air flow path of the air conditioning case 110. The cooling heat exchanger is made of an evaporator 102, and the heating heat exchanger is made of a heater core 103. The evaporator 102 and the heater core 103 are sequentially installed in the air flow direction at a predetermined interval.

5 is a side view illustrating an air conditioning case in which a heater core and an electric heat heater are not installed according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating that an electric heat heater is installed in an insertion hole of the air conditioning case in FIG. 7 is a diagram illustrating that the heater core is installed in the insertion hole of the air conditioning case in FIG. 6, FIG. 8 is a partially cut-away perspective view showing the interior of the air conditioning case according to an embodiment of the present invention, and FIG. 9 is an embodiment of the present invention. A cross-sectional view showing an electrothermal heater according to an example, and FIG. 10 is a cross-sectional view illustrating that an electrothermal heater and a heater core are coupled to an air conditioning case according to an embodiment of the present invention.

In the following description, the left and right directions in FIG. 9 are the front and rear directions of the vehicle, and the protruding direction in the drawing is the vehicle width direction and the insertion direction of the heater core and the electric heater.

5 to 10, the heater core 103 is provided inside the air conditioning case 110, and heats air by a cooling water heat source. The heater core 103 includes a pair of header tanks, a cooling water pipe 133, a tube 135, and a radiating fin. A pair of header tanks are provided side by side with a certain distance apart in the height direction. The tubes 135 form a cooling water flow path and are formed in a plurality, and the heat dissipation fins are interposed between the plurality of tubes 135 to heat exchange with air passing therethrough to improve heat exchange performance of the heater core 103.

The air flow path 114 of the air conditioning case 110 is divided into an upper flow path 114b and a lower flow path 114a by a separation wall 140. The air introduced through the internal air inlet flows to the lower flow path 114a, and the air introduced through the external air intake flows to the upper flow path 114b. The separation wall 140 is formed to extend upstream of the evaporator 102, between the evaporator 102 and the heater core 103, and downstream of the heater core 103.

The upper flow path 114b is provided with a first temp door 111 that controls the amount of air passing through the heater core 103 and the air bypassing, and the lower flow path 114a passes through the heater core 103. A second temp door 112 is provided to control the amount of air and air bypassed. That is, the upper flow path 114b is made of an upper cold air flow path and an upper warm air flow path, and the lower flow path 114a is formed of a lower warm air flow path and a lower cold air flow path. An upper cool air passage, an upper warm air passage, a lower warm air passage, and a lower cool air passage are arranged sequentially from the top.

The vehicle air conditioner includes a member having a through hole. A member having a through hole is provided downstream of the heater core 103 in the air flow direction, and has a plurality of through holes penetrating in the air flow direction. The through hole is a hole through which air passing through the heater core 103 can pass. A member having a through-hole may be formed of an electric heater 200 or a dummy of an electric heater.

The electric heat heater 200 is a heat exchanger for auxiliary heating that generates heat by applying power. In addition, the electric heater dummy is an imitation of an electric heat heater made of a material such as synthetic resin. In the case of a specification of an air conditioner that does not use an electric heater, the air conditioning case can be shared by selectively using an electric heater or a dummy of electric heaters. In the present embodiment, an example in which the member having the through hole is formed of the electric heater 200 will be described, and the member having the through hole may be formed of a dummy of the electric heating heater.

The electric heater 200 is provided on the downstream side of the heater core 103 of the air flow path inside the air conditioning case 110, and heats the air by heating by applying power. The electric heater 200 may be made of a PTC heater (Positive Temperature Cofficient Heater). The electric heater 200 is composed of a cover part 210, a body part 220, and a heating part.

The cover part 210 is provided with a terminal part 211 for receiving power. The body portion 220 is made in a substantially plate shape and has a plurality of through holes through which air can pass. The heating unit is fixed to the body unit 220 and generates heat by power applied to the terminal unit 211, and may be formed of a heating tube or the like having an electrode and using a PTC element.

The cover part 210 is coupled to the air conditioning case 110, and a sealing surface of the heater core 103 is formed on the cover part 210. That is, the cover portion 210 of the electric heater 200 forms a pocket shape inside the surface of the air conditioning case 110 to form a sealing surface of the heater core 103. Through this configuration, a hole for inserting the heater core 103 formed in the air conditioning case 110 and a hole for inserting the electric heater 200 can be unified.

In addition, the cover part 210 functions to maintain a predetermined interval between the heater core 103 and the electric heater 200. A single insertion hole 131 is formed on one side of the air conditioning case 110 in the vehicle width direction. The insertion hole 131 inserts the heater core 103 and inserts the electric heater 200. In addition, in a state in which the heater core 103 and the electric heater 200 are inserted through one insertion hole 131, the cover part 210 closely supports the heater core 103.

Specifically, the electric heater 200 is provided with a spacing support. The spacing support part functions to support the through holes formed in the electric heater 200 from the heater core 103 by being spaced apart from each other by a predetermined distance. In addition, a protruding tongue 150 is formed in one of the air conditioning case 110 and the heat transfer heater 200, and a groove-shaped groove 212 coupled to the tongue 150 is formed in the other.

Through the tongue 150 and the groove 212, the coupling force between the electric heater 200 and the air conditioning case 110 is strengthened, and the cover part 210 of the electric heating heater 200 is in the front and rear direction of the vehicle with respect to the air conditioning case 110 And constrained in the vertical direction. In addition, in the air conditioning case 110, fastening holes 132 are formed on the upper and lower sides of the insertion hole 131, respectively, and the screw 201 passes through the cover part 210 of the electric heater 200 to pass through the fastening hole ( 132).

As shown in Figure 5, the insertion hole 131 formed on the side of the air conditioning case 110 includes a heater core insertion hole corresponding to the size of the heater core 103 and an electric heater insertion hole corresponding to the size of the electric heater 200. Combined into one, it forms a relatively large hole shape into which both the heater core 103 and the electric heater 200 can be inserted.

As shown in Figure 6, when the heat transfer heater 200 is inserted into the insertion hole 131 of the air conditioning case 110 and fastened, one side of the cover part 210 of the heat transfer heater 200 (the side facing the front of the vehicle) By forming the sealing surface of the heater core 103, the insertion hole 131 forms a relatively small hole shape corresponding to the size of the heater core 103 so that only the heater core 103 can be slide inserted.

As shown in FIG. 7, when the heater core 103 is inserted and fastened into the insertion hole 131 of the air conditioning case 110, the electric heater 200 and the heater core 103 are in close contact with each other while maintaining a certain distance. It has improved sealing performance and is stably fixed to the air conditioning case 110.

More specifically, the electric heater 200 includes an extension part 235, a support part 230, a sealing member 240 and a rib 250. In addition, a protruding tongue 150 is formed in the air conditioning case 110, and a groove 212 is formed in the cover part 210 of the electric heater 200. As shown in FIG. 5, the tongue 150 is formed outside the air conditioning case 110, which is the opposite side of the heater core 103, among the circumference of one insertion hole 131 formed in the air conditioning case 110.

In this way, the tongue 150 and the groove 212 are not formed over the entire circumference of the insertion hole 131, but are formed only outside the air conditioning case 110, which is the opposite side of the heater core 103, when assembling or transferring the electric heater. Deformation of the tongue 150 formed in the air conditioning case 110 is minimized, thereby minimizing air leakage.

The extension part 235 extends toward the heater core 103 from the cover part 210 for fixing the electric heater 200 to maintain a gap between the heater core 103 and the electric heater 200. In addition, the support part 230 is formed at an end of the extension part 235 and is bent inward of the air conditioning case 110 to support the heater core 103. In this case, the support 230 supports the end of the tube 135.

The sealing member 240 is made of a soft material such as rubber or urethane, and is formed at the end of the support part 230 in contact with the heater core 103. In addition, the cover part 210 including the extension part 235 and the support part 230 is made of a rigid material such as a synthetic resin material. The support part 230 is vertically bent at the end of the extension part 235. The rib 250 has a triangular cross-sectional shape and is formed between the support part 230 and the extension part 235 to support the support part 230 and the extension part 235.

The support part 230 is bent at the end of the extension part 235 to stably support the tube 135 of the heater core 103 while maintaining a predetermined distance from the body part 220 of the electric heater 200. The extension part 235 extends in a direction from the cover part 210 to the front, that is, toward the heater core 103, so that the separation distance between the body part 220 of the electric heater 200 and the heater core 103 is always Keep it.

In this case, a predetermined space is formed between the body portion 220 of the electric heater 200 and the sealing surface of the heater core 103. That is, without directly supporting the heater core 103 to the member extending from the cover part 210 toward the front, as in an embodiment of the present invention, the "a" through the configuration of the extension part 235 and the support part 230 "As it is formed in a curved structure in a shape, a space part is formed between the support part 230 and the body part 220, so that the heat of the body part 220, which is a heating part, is transferred to the support part 230 or the heater core 103 It can effectively prevent the overturning.

In this way, the tongue & groove between the heater core and the electric heater (or the electric heater dummy) cover part and the sealing surface of the heater core are unified in the electric heater cover part to prevent deformation of the air conditioning case and minimize air leakage, and assemble. You can improve your sex. In addition, as the cover portion of the electric heater forms a pocket shape inside the air conditioning case to form a sealing section, it is possible to reinforce the fixing force of the heater core according to the assembly sequence.

In addition, it is possible to stably maintain the distance between the heater core and the electric heating heater relatively close to about 15 mm without deformation of the air conditioning case, and it is possible to reduce the manufacturing cost by simplifying the mold of the air conditioning case.

Until now, 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 scope of protection should be determined by the technical spirit of the appended claims.

102: evaporator 103: heater core
110: air conditioning case 111: first temp door
112: second temp door 116: defrost vent
117: face vent 118: floor vent
119: console vent 114: air flow path
114a: lower flow path 114b: upper flow path
121: defrost door 122: face door
123: floor door 124: console door
140: separation wall 131: insertion hole
132: fastening hole 133: cooling water pipe
135: tube 150: tongue
200: electric heater 201: screw
210: cover portion 211: terminal portion
220: body 230: support
235: extension part 240: sealing member
250: rib 212: groove

Claims (14)

An air conditioning case 110 having an air flow path formed therein;
A heating heat exchanger provided in the air flow path of the air conditioning case 110 and exchanging heat with air passing through the air flow path; And
It is provided downstream of the heating heat exchanger in the air flow direction, and includes a member having a through hole formed with a plurality of through holes through which air passing through the heating heat exchanger can pass,
The member having the through hole has a cover part 210 coupled to the air conditioning case 110,
A vehicle air conditioner, characterized in that the sealing surface of the heat exchanger for heating is formed on the cover part 210. The method of claim 1,
A vehicle air conditioner, characterized in that the cover part 210 of the member having the through hole forms a pocket shape inside the surface of the air conditioning case 110 to form a sealing surface of the heat exchanger for heating. The method of claim 1,
The cover 210 is an air conditioning apparatus for a vehicle, characterized in that maintaining a predetermined distance between the heat exchanger for heating and a member having a through hole. The method of claim 1,
The air conditioner for a vehicle, characterized in that the member having the through hole is formed of an electric heat heater 200 or a dummy of electric heat heaters that generate heat by application of power. The method of claim 1,
One insertion hole 131 for inserting a member having a through hole while inserting a heat exchanger for heating into the air conditioning case 110 is formed,
The vehicle air conditioner, wherein the cover part 210 closely supports the heating heat exchanger in a state in which a member having a heating heat exchanger and a through hole is inserted through the one insertion hole 131. The method according to any one of claims 1 to 5,
The member having the through hole,
A vehicle air conditioner comprising a space support part for supporting the through hole by spaced apart from the heating heat exchanger. The method according to any one of claims 1 to 5,
For a vehicle, characterized in that a protruding tongue 150 is formed in one of the air conditioning case 110 and a member having a through hole, and a groove-shaped groove 212 coupled to the tongue 150 is formed in the other Air conditioning system. The method of claim 7,
The tongue 150 or the groove 212 is formed outside the air conditioning case 110, which is the opposite side of the heating heat exchanger, among the circumference of one insertion hole 131 formed in the air conditioning case 110. The method of claim 6,
The spacing support part,
A vehicle air conditioner comprising an extension part 235 extending from a cover part 210 for fixing a member having a through hole toward a heat exchanger for heating and maintaining a gap between the heat exchanger for heating and a member having the through hole. The method of claim 9,
A vehicle air conditioner provided with a support part 230 at an end of the extension part 235 to support a heat exchanger for heating by being bent to the inside of the air conditioning case 110. The method of claim 10,
A vehicle air conditioner, characterized in that a sealing member (240) is provided at an end of the support part (230) in contact with the heating heat exchanger. The method of claim 10,
The support part 230 is vertically curved at the end of the extension part 235, and a rib 250 for supporting between the support part 230 and the extension part 235 is provided. The method of claim 10,
The heat exchanger for heating includes a heater core 103 having a plurality of tubes 135 forming a cooling water flow path,
The support part 230 is a vehicle air conditioner, characterized in that to support the end of the tube (135). The method according to any one of claims 1 to 5,
The member having the through hole includes a body portion 220 having a through hole, and a space portion is formed between the body portion 220 and the sealing surface of the heating heat exchanger.

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