KR101281289B1 - Control Method of Two-Layer Air Flowing Type Air-Conditioning System for a Car - Google Patents

Abstract

The present invention provides a control method of a two-layer airflow type automotive air conditioner, comprising: (a) determining whether an outside temperature is smaller than a set temperature; (b) maintaining the outdoor air mode when the outside air temperature is greater than the set temperature in step (a), and performing a double flow mode when it is determined that the outside air temperature is less than the set temperature; (c) determining whether the heating mode is the maximum; (d) after performing the laminar flow mode in which it is determined that the outside air temperature is lower than the set temperature in step (a), if it is determined that the maximum heating mode is in step (c), it is determined whether the vehicle indoor temperature has reached the set temperature; If it is not reached, maintaining the two-laminar flow mode as it is; if it is reached, releasing the maximum heating mode after a predetermined time and switching to the outside air mode; Characterized in that it comprises a. Here, the maximum heating mode means that the temporal door is rotated by 90% or more toward the cold air passage at the position where the hot air passage is blocked. According to this control method, when a certain condition is satisfied, after switching to the double-flow mode, the temporal door is changed to the maximum heating mode position to perform the efficient double-flow mode, and when the outside temperature is lowered in this state, the double-flow mode is changed. By releasing and switching to the outdoor air mode, it is possible to provide a comfortable riding comfort to the occupant at all times by reducing the temperature difference between the inside and the inside of the vehicle room due to the change in the outdoor air temperature.

Double layer, air flow, air conditioner, control method, maximum heating, double flow mode, up and down temperature difference, discomfort, heat

Description

Control Method of Two-Layer Air Flowing Type Air-Conditioning System for a Car}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view showing an air conditioner for a two-layer airflow type automobile according to a conventional example.

Figure 2 is a cross-sectional view showing the air flow in the double-layer air flow type vehicle air conditioner according to the present invention, the double-flow air mixture mode.

Figure 3 is a two-flow mode control flow chart of a two-layer airflow air conditioner according to the present invention.

Figure 4 is another two-flow mode control flow chart of a two-layer airflow air conditioner according to the present invention.

Description of the Related Art

11: air conditioning case

13, 14: air passage

15: Defrost Vent

16: Face Vent

17: Floor Vent

18: evaporator

19: Heater Core

20: Temp Door

21: auxiliary door

24: partition wall door

25: Floor Door

C: cold air passage

H: Warm air passage

The present invention relates to a control method of a two-floor air-flow type vehicle air conditioner, and more particularly, for a two-floor air-flow type vehicle that can provide a comfortable ride to passengers by reducing the difference between the upper and lower temperatures in the cabin due to the change in the outside temperature. It relates to a control method of the air conditioning apparatus.

In general, a vehicle air conditioner includes a cooling system for cooling the interior of a vehicle, and a heating system for heating the interior of the vehicle. The cooling system compresses the refrigerant by a compressor driven by the engine and sends the refrigerant to the condenser. The refrigerant is condensed by the forced air of the cooling fan, and the refrigerant is then transferred to the receiver dryer, the expansion valve and the evaporator. In the process of returning back to the compressor in turn, the air blown by the blower unit installed at the inlet end of the air conditioning case and the refrigerant passing through the evaporator are heat-exchanged. By discharging, the vehicle interior is cooled. On the other hand, the heating system heat-exchanges the air blown by the blower fan of the blower unit and the cooling water passing through the heater core in the process of returning the cooling water of the engine to the engine via the heater core. By discharging air into the vehicle interior, the vehicle interior is heated.

By the way, the general air conditioner as described above, the indoor temperature is lowered because it introduces low-humid cold outside air to prevent frost on the window during the heating run in winter, thereby causing a problem that the heating performance is greatly reduced.

Accordingly, in recent years, by adopting a two-layer air flow method that supplies outside air to the upper side of the vehicle interior and internal air to the lower side, defogging by supplying warm air of the outside air to the window glass through the defrost vent of the air conditioning case during heating driving. At the same time, air conditioners for double-floor airflow vehicles have been developed to improve the heating performance of the cabin by supplying warm air of the bet under the occupants' feet through the floor vent of the air conditioning case.

As a representative of such a double-layer air-flow type automotive air conditioner, a semi-center mounting type of a double-layer air flow type vehicle air conditioner 50 disclosed in Japanese Patent Application Laid-Open No. 10-109520 illustrated in FIG. Can be mentioned.

As shown in FIG. 1, the air conditioner 50 partitions the first air passage 53, which is an internal air inlet, and the second air passage 54, which is an external air inlet, by the partition wall 52. A case 51 having a first blowing fan (not shown) and a second blowing fan (not shown) respectively installed in the air passage 53 and the second air passage 54, and sequentially installed in the case 51; And an evaporator 55 and a heater core 56 for heat-exchanging air, respectively installed at upper and lower sides between the evaporator 55 and the heater core 56 and interlocked with each other to switch a cooling and heating mode. 57) and an auxiliary door 58, and a hot air bypass door 59 provided on the outlet side of the heater core 56.

The conventional two-layer airflow type vehicle air conditioner configured as described above, as shown by the dotted line in FIG. 1, rotates the temporal door 57 and the auxiliary door 58 downward to block the front of the heater core 56. At the same time, by opening the upper passage of the heater core 56, after the internal and external air introduced by the first blowing fan and the second blowing fan are cooled while passing through the evaporator 55, the defrost vent 60 ) And face vent (61) is supplied to the interior of the vehicle to cool the interior. In the heating mode and the double flow mode, as shown by the solid line in FIG. 1, the first door is opened by rotating the temporal door 57 and the auxiliary door 58 upward to open the heater core 56. The bet introduced into the lower part by the fan passes through the lower part of the heater core 56 and is supplied into the interior of the vehicle through floor vents 62 and 63 to increase the room temperature, and also the outside air introduced by the second blowing fan. The exhaust gas is discharged to the defrost vent 60 through the upper passage of the heater core 56 to perform defogging performance.

As described above, the conventional double-layer air-flow type vehicle air conditioner, in the double-flow mode, the first air passage 53 is rotated in the direction indicated by the temporal 57 and the auxiliary door 58 in a solid line flows through the bet. And a second air passage (54) through which outside air flows, and the first air passage (53) communicates with floor vents (62, 63), and the second air passage (54) is defrost vent (60). And defogging and heating in the vehicle interior.

However, such an air conditioner, when the outside air temperature is higher than the set temperature in the cabin, the temperature of the passenger's foot does not change significantly, but the heat toward the upper body including the passenger's face is greatly increased and may give thermal discomfort to the passenger. have. By adjusting the opening angle of the temp door, it is possible to eliminate the discomfort of the heat by properly adjusting the up and down temperature difference in the cabin in the double-flow mode, but when the outside air temperature decreases in this double-flow mode, discharge to the defrost vent side Since the air temperature is lowered, there is a problem that the upper and lower temperature difference in the interior of the vehicle is increased, thereby providing a passenger with a thermally comfortable ride.

Accordingly, the present invention has been made to solve the above-described problems, and the control of the air-conditioning device for a two-floor air-flow type vehicle to provide a comfortable riding comfort to the occupant by reducing the temperature difference between the inside and outside of the cabin due to the change in outside temperature The purpose is to provide a method.

In order to achieve the above object, the present invention, the air conditioner having a plurality of air passages which are partitioned up and down by a partition wall on the inlet side and a plurality of vents in communication with each part of the vehicle compartment on the outlet side; An evaporator and a heater core installed to be spaced apart from each other in the air conditioning case to heat exchange the air introduced through the air passage; A temporal door installed between the evaporator and the heater core to adjust an opening degree of a cold air passage above the heater core; Temporary doors and auxiliary doors installed on the upper and lower sides between the evaporator and the heater core and interlocked to switch a cooling and heating mode; In the method for controlling the air-conditioning device for a two-story air flow type vehicle comprising:

(a) determining whether the outside temperature is lower than the set temperature;

(b) maintaining the outdoor air mode when the outside air temperature is greater than the set temperature in step (a), and performing a double flow mode when it is determined that the outside air temperature is less than the set temperature;

(c) determining whether the heating mode is the maximum;

(d) after performing the laminar flow mode in which it is determined that the outside air temperature is lower than the set temperature in step (a), if it is determined that the maximum heating mode is in step (c), it is determined whether the vehicle indoor temperature has reached the set temperature; If it is not reached, maintaining the two-laminar flow mode as it is; if it is reached, releasing the maximum heating mode after a predetermined time and switching to the outside air mode; Characterized in that it comprises a.

Further, before step (a), the method may further include determining whether the outside temperature is smaller than the predetermined temperature, and after step (a) is determined after the outside temperature is determined to be smaller than the predetermined temperature.

Further, before the step (a), further comprising the step of determining whether or not the automatic temperature control mode and the air volume is maximum, and performing the step (a) after it is determined that the automatic temperature control mode and the air volume is the maximum It is characterized by.

In this case, the maximum heating mode is characterized in that the temp door is rotated by 90% or more toward the cold air passage at the position to block the hot air passage.

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

Figure 2 shows an air conditioning apparatus for a double-decker air flow type vehicle according to the present invention. However, the air conditioner shown in FIG. 2 is only one example for explaining the present invention, and is not necessarily limited to such a structure.

As shown in Figure 2, the air-conditioning device 10 for a two-stage air flow type vehicle according to the present invention, the first and second air passages are divided up and down by the partition wall 12 so that the inside and the outside air flows into the inlet side, respectively. (13) and (14), an air-conditioning case (11) having a defrost vent (15), a face vent (16), and a floor vent (17) in communication with the respective parts in the vehicle compartment on the exit side; A blower unit (not shown) installed in the first and second air passages 13 and 14 to selectively introduce the inside and the outside air through the second air passages 13 and 14, and near the blower unit. It is provided with the evaporator 18 and the heater core 19 which are installed and cool or heat the air blown by the said blower unit.

The blower unit is divided into a first blowing fan (not shown) and a second blowing fan (not shown), and the first blowing fan is installed in the first air passage (13) of the air conditioning case (11). Circulated to the bottom of the air conditioning case 11, the second blowing fan is installed in the second air passage 14 of the air conditioning case 11 to circulate the outside air to the top of the air conditioning case (11).

On the upper side between the evaporator 18 and the heater core 19, air passing through the evaporator 18 from the first and second air passages 13 and 14 selectively opens and closes the heater core 19. Temper door 20 rotated up and down about the rotating shaft so as to selectively open and close the cold air passage (C) bypassing the heater core (19) and the hot air passage (H) in front of the heater core (19). ) Is installed.

Furthermore, the defrost vent 15, the face vent 16, and the floor vent 17 are selectively provided according to the respective modes (heating mode, cooling mode, bi-level mode, floor mode, defrost mode, etc.). The defrost door 22, the face door 23, and the floor door 25 for opening and closing the vents 15, 16, and 17 are rotatably provided, respectively.

In addition, the heater core 19 is provided as an auxiliary door 21 interlocked with the tempor 20 under the temporal door 20, that is, in the center between the evaporator 18 and the heater core 19. The partition wall combined door of the butterfly type structure which opens and closes the front air passage H is rotatably provided.

As shown in FIG. 2, the auxiliary door 21 rotates together with the rotary shaft 21a and the rotary shaft 21a so as to rotate together toward the evaporator 18 and the heater core 19 with respect to the rotary shaft 21a. The first and second door members 21b and 21c are inclined at a predetermined angle.

The auxiliary door 21 having such a structure serves as a separating wall for separating the air passing through the evaporator 18 from the first and second air passages 13 and 14 into a double flow in the double flow mode. Or in other general modes, the air introduced through the first and second air passages 13 and 14 passes the cold air passage C or the heater core above the evaporator 18 and the heater core 19. (19) It serves as a guide to the front warm air passage (H).

That is, in the two-laminar flow mode, the auxiliary door 21 is positioned so that the auxiliary door 21 is positioned in a direction substantially parallel to the flow of air flowing through the first and second air passages 13 and 14. The first door member 21b is rotated toward the rear side of the evaporator 18 while the second door member 21c is rotated toward the center of the heater core 19 in front of the first air passage 13. ) And the inside and outside air introduced through the second air passage 14 are separated into two-layer flows.

Here, in the present invention, as the auxiliary door 21, the above-described partition wall door is adopted, but as shown in FIG. 1, a plate-like structure such as a temporal door may be used. However, by using the same structure as the partition wall door, there is an advantage that can not interfere with the temp door when interlocking with the temp door, and also can reduce the installation space according to the rotation radius of the door.

Meanwhile, the floor vent 17 is opened and closed between the rear of the heater core 19, that is, the rear of the heater core 19 and the inlet of the floor vent 17 formed at the lower side of the air conditioning case 11. In addition, a partition wall combined door 24 for separating the heater core 19 rearwards up and down is provided.

Similar to the structure of the auxiliary door 21, the partition wall combined door 24 is provided together with the rotary shaft 24a and the rotary core 24a toward the heater core 19 and the floor vent 17. The first and second door members 24b and 24c are installed to be inclined at a predetermined angle to the rotation shaft 24a so as to rotate.

Therefore, in the two-flow mode, the first door member 24b of the double-use wall 24 serves as a separation wall for separating the air passing through the heater core 15 into the two-flow flow. The second door member 24c serves to guide the air passing through the heater core 19 to the floor vent 17 side. At this time, the first door member 24b of the dividing wall combined door 24 is aligned with an extension line of the second door member 21c which is rotated forward of the heater core of the auxiliary door 21 and the second door. The member 24c is directed toward the inlet side of the floor vent 17.

In addition, in the case of the general mode, the partition-walled door 24 acts as a floor door that closes the inlet of the floor vent 17 by the second door member 24c. At this time, in the normal mode, opening and closing of the floor vent 17 is controlled by another floor door 25.

The first door member 24b and the second door member 24c of the dividing wall combined door 24 may have the same length, or the first door member 24b and the second door member 24c. At least one of them may have a length corresponding to the interval from the rotation shaft 24a to the central portion of the heater core 19.

In this way, in order to reliably partition the air passing through the heater core 19 into the two-layer flow of the internal and external air, the auxiliary wall for separating wall 24 serving as the floor door provided behind the heater core 19 is supported. By forming a butterfly-type structure that rotates in conjunction with the door 21, the installation space according to the turning radius of the door can be reduced, and the driving mechanism is compared with employing two doors behind the heater core as before. Can be further simplified.

When explaining the operation of the air conditioner according to the present invention having the structure as described above for each mode as follows.

 First, in the two-flow mode as shown in FIG. 2, the temporal door 20 is pivoted upward to block the cold air passage C, and the auxiliary door 21 and the partition wall combined door. The floor door 24 is rotated at an angle in a direction substantially parallel to the flow of air flowing through the first and second air passages 13 and 14 which are air passages of the inside and outside air. At this time, the auxiliary door 21 and the first door member 24b of the floor door 24 serve as a separating wall separating the air passages of the inside and outside air, The second door member 24c serves to guide the air passing through the heater core 19 toward the floor vent 17.

Accordingly, air heated while passing through the lower half of the heater core 19 through the first air passage 13, that is, the warm air, is discharged to the floor vent 17, and at the same time, the second air passage 14 is discharged. The air heated while passing through the heater core upper half, i.e., the outside air warm air, is discharged to the defrost vent 15, thereby realizing both heating and defogging performance for the interior of the vehicle.

On the other hand, in the heating defrost mode which shows an example of a general mode, the said temp door 20 and the said auxiliary door 21 are rotated so that the heater core 19 front may be opened as mentioned above, and the said floor door 24 rotates to close the inlet of the floor vent 17. As a result, the air introduced through the first and second air passages 13 and 14 is discharged to the defrost vent 15 in a heat exchange state while passing through the upper half and the lower half of the heater core 19, respectively.

In addition, in the case of the maximum cooling mode, the auxiliary door 21 is rotated at a predetermined angle to a position to block the hot air passage (H) that is the front of the heater core 19, the temp door 20 is the cold air passage By opening (C) and rotating downwards to intersect the end of the partition-walled door 21, air passing through the first and second air passages 13 and 14 passes through the evaporator 18. After cooling, the interior of the vehicle is cooled through the face vent 16.

Furthermore, in the maximum heating mode, when the temporal door 20 is rotated upward to block the cold air passage C, the auxiliary door 21 is a hot air passage H which is the front of the heater core 19. It is rotated to a position to block the lower half of the, the floor door 24 is rotated to close the inlet of the floor vent (17). As a result, the air introduced through the first and second air passages 13 and 14 is discharged through the vents 15, 16, and 17 in a heat exchange state while passing through the upper half of the heater core 19. It is heated indoors. Alternatively, when the auxiliary door 21 is rotated at a predetermined angle in a direction substantially parallel to the flow of air introduced through the first and second air passages 13 and 14 which are air passages of the inside and outside air, And the air introduced through the second air passages 13 and 14 is discharged through each of the vents 15, 16, and 17 in a heat exchange state while passing through the upper half and the lower half of the heater core 19, respectively. Heating.

Next, the control method of the air conditioning apparatus comprised in this way is demonstrated with reference to FIG.

First, after the vehicle start switch is turned on (S1), the set temperature is input through a temperature setter for setting a target temperature for the passenger to adjust the temperature in the vehicle interior (S2).

After the above step S2, the bet mode or the outside air mode is determined (S3). If it is determined as the outside air mode (S4), the flow advances to step S5, otherwise the flow goes to step S4-1 to perform the bet mode.

In step S5, it is determined whether or not the outside temperature is smaller than the predetermined temperature (for example, 15 ° C). When it is determined as 'yes', it is determined whether or not the outside temperature is smaller than the set temperature (S6). If the outside temperature is larger than the predetermined temperature and higher than the set temperature, the outside air mode is maintained as it is (S6-1).

If it is determined in step S6 that the outside air temperature is lower than the set temperature, a two-flow mode is performed in which the inside and outside air are introduced through the first and second air passages 13 and 14 and separated into two-flow flows (S7).

Next, the temp door 20 is changed to the position of the maximum heating mode, and it is determined whether or not it is at the position (S8). If it is determined that the position is not in the position, the temp door 20 is changed to the position of the maximum heating mode (S8-1).

At this time, since the auxiliary door 21 which cooperates with the temp door 20 is integrally rotated with the temp door 20, the auxiliary door 21 is moved to a position for performing the maximum heating mode together as shown in FIG. 2.

In this case, the internal and external air introduced through the first and second air passages 13 and 14, respectively, are heat-exchanged while passing through the hot air passage H in front of the heater core 19 via the evaporator 18. It is discharged through the defrost vent 15 and the floor vent 17 from the state to perform the heating and defogging performance for the interior of the vehicle together.

However, the maximum heating mode here means not only a state in which both the inside and the outside air pass through the hot air passage H, but also includes a state in which a part of the air passes through the cold air passage C. That is, the maximum heating mode means a state when the temporal door 20 is rotated 90% or more toward the cooling air passage C from the maximum cooling mode position at which the hot air passage H is completely blocked. Is that it may include a state passing through the cold air passage (C).

On the other hand, when the laminar flow mode state is maintained for a long time when the outside air temperature is lower than the set temperature as described above, the air temperature discharged to the floor vent side is not largely changed, but the air temperature discharged to the defrost vent side is greatly lowered. There is a problem that the temperature difference between the upper and lower, thereby providing a comfortable riding comfort to the occupants.

Therefore, in the above case, it is necessary to cancel the two-layer flow mode and switch to the outside air mode.

If it is determined in step S8 that the answer is yes, the process proceeds to step S9 to determine whether the vehicle indoor temperature has reached the set temperature, and if not, maintains the double-flow mode as it is (S9-1). If the temp door 20 is released from the maximum heating mode position to maintain the two-flow mode (S10). In this state, when a predetermined time (for example, 3 minutes to 5 minutes) has elapsed (S11), the double-laminar flow mode is canceled and the mode is switched to the outside air mode (S12). According to this process, it can suppress that the up-and-down temperature difference in a cabin becomes large as a fall of outside air temperature.

As described above, the present invention maintains the double-flow mode only when the occupant feels thermal comfort in accordance with the change of temperature difference in the vehicle interior, otherwise, the double-flow mode is canceled and switched to the outside air mode, so Can provide a more comfortable ride.

On the other hand, Figure 4 shows a control flow chart for explaining the control method of the two-laminar flow mode when the air conditioner according to the present invention is a fully automatic air conditioner, step S1-1 is added and compared with FIG. Since only S5 is slightly different, other steps are performed in the same manner as in FIG. 3, and thus description thereof will be omitted below.

In general, the Full Auto Temperature Control (FATC) air conditioner is operated by a driver directly operating a control switch installed in the center of an instrument panel in a vehicle. Compared to the manual air conditioner selected by the driver, if only the room temperature required by the driver is set, the mode, air volume, etc. are automatically controlled by the programmed Micom according to the external conditions, so that there is no need for any operation during driving. There is an advantage that can be more convenient and safe operation.

In other words, the fully automatic air conditioner receives various input signals such as sensors and control switches for sensing the air temperature, the outside temperature, the evaporator, and the water temperature of the heater core. By automatically controlling (mode door motor, temp door motor, internal and external door motor), the indoor temperature is maintained at the set temperature of the driver.

In the case of such an air conditioning apparatus, after confirming the ON state S1 of the start switch, it is determined in step S1-1 whether it is the automatic temperature control mode. In such a case, steps S3, S4, and S4-1 as shown in Fig. 3 are performed, and in step S4, it is determined whether the air volume is maximum HI (S5). If the air volume is maximum, the two-laminar flow mode is controlled while performing the process after step S6 as shown in FIG.

In the case of FIG. 4, since the automatic temperature control is performed, as shown in FIG. 3, it is not necessary to determine whether the outside temperature is smaller than the predetermined temperature, and only the air volume is checked to control the efficient two-laminar flow mode. Can be.

Although the present invention has been described with respect to the preferred embodiment, the present invention is not limited thereto, and various modifications and applications will be possible to those skilled in the art without departing from the gist of the present invention.

As described above, according to the present invention, when a certain condition (1. outside temperature <predetermined temperature, outside temperature <set temperature, 2. air flow rate = maximum, outside temperature <set temperature conditions) is satisfied. After switching to the double flow mode, change the temp door to the maximum heating mode position to perform the efficient double flow mode, and when the outside temperature is lower than the set temperature, the indoor temperature of the vehicle is maintained at the set temperature. When reaching, the laminar flow mode is canceled and the mode is switched to the outside air mode, thereby reducing the difference between the upper and lower temperatures in the cabin due to the change in the outside air temperature, thereby providing a comfortable riding comfort to the occupants at all times.

Claims (4)

An air conditioning case having a plurality of air passages 13 and 14 partitioned up and down by a partition wall 12 at the inlet side and a plurality of vents 15, 16 and 17 communicating with respective portions in the vehicle compartment at the outlet side ( 11); An evaporator 18 and a heater core 19 spaced apart from each other in the air conditioning case 11 to heat exchange the air introduced through the air passages 13 and 14; A temp door 20 installed between the evaporator 18 and the heater core 19 to adjust an opening degree of the cold air passage C above the heater core 19; A temporal door 20 and an auxiliary door 21 installed between upper and lower sides between the evaporator 18 and the heater core 19 and interlocked to switch a cooling and heating mode; In the method for controlling the air-conditioning device for a two-story air flow type vehicle comprising: (a) determining whether the outside temperature is lower than the set temperature; (b) maintaining the outdoor air mode when the outside air temperature is greater than the set temperature in step (a), and performing a double flow mode when it is determined that the outside air temperature is less than the set temperature; (c) determining whether the heating mode is the maximum; (d) after performing the laminar flow mode in which it is determined that the outside air temperature is lower than the set temperature in step (a), if it is determined that the maximum heating mode is in step (c), it is determined whether the vehicle indoor temperature has reached the set temperature; If not reached, maintaining the double flow mode, and if reached, releasing the maximum heating mode and switching to the outdoor mode after a predetermined time elapses; Control method of a two-story air-flow type automotive air conditioner comprising a. The method of claim 1, Before the step (a), further comprising the step of determining whether the outside temperature is less than the predetermined temperature, the step (a) after the outside air temperature is determined to be less than the predetermined temperature characterized in that Control method of air conditioner for water. The method of claim 1, Before the step (a), further comprising the step of determining whether or not the automatic temperature control mode and the wind volume, characterized in that the step (a) after the automatic temperature control mode and the air volume is determined to be the maximum Control method of the air-conditioning device for a two-story air flow type vehicle. 4. The method according to any one of claims 1 to 3, The maximum heating mode is a control method of a two-story air-flow type automotive air conditioner, characterized in that the door is rotated 90% or more toward the cold air passage (C) at the position to block the hot air passage (H).

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