JPS5918889Y2 - Air conditioner heater unit - Google Patents

Description

[Detailed description of the invention] This invention is mainly used in automobile air conditioners, and is a heater that is equipped with a temperature adjustment door, a heater core, etc., and controls the blowout temperature by heating and mixing air that is pumped from a cooling unit. This concerns improvements to the unit.

This type of heater unit allows the air cooled by the cooling unit to either pass through the heater core or not, by adjusting the opening degree of the temperature adjustment door provided at the rear of the air inlet passage connected to the cooling unit. The structure is such that the blowing temperature is controlled by distributing the liquid to the air and mixing it afterwards.

That is, in the maximum cooling mode, the temperature adjustment door closes the air heating passage in which the heater core is provided.

However, since there is a risk of heating the air flowing back from the bypass passage for mixing the heated air, conventionally a water valve was installed to stop the supply of hot water to the heater core, which caused a price increase. It had become.

Therefore, it is possible to reduce costs by eliminating the water valve and instead providing a means to prevent backflow from the bypass passage, but it is possible to simply connect a door that opens and closes the entire heater core side outlet behind the heater core with the temperature adjustment door. If so, the heat of the heater core will be transferred to the door, and it will not be possible to completely prevent the heating of the air flowing back.

In addition, the door must have a large area corresponding to the exit of the heater core, and a large space is required behind the heater core in order to rotate the door. Therefore, this invention provides an auxiliary door that interlocks with the temperature adjustment door in the bypass passage provided on the side of the heater core.
By opening the bypass passage when the temperature adjustment door is on the full hot side and closing the bypass passage when the temperature adjustment door is on the full cool side, air flowing back from the bypass passage to the heater core can be prevented, even if the water valve is eliminated. It is an object of the present invention to provide a heater unit in which the blowout temperature can be completely adjusted and the rear area of the heater core can be made small.

Examples of this invention will be described below with reference to the drawings.

In FIG. 1, a heater unit of an air conditioner of this invention is shown, and an air inlet passage 2 formed in a case 1 is connected to a cooling unit in which an evaporator is housed, and cold air is sent when the evaporator is in operation. Outside air is supplied when the unit is not in operation.

On the downstream side of this air artificial passage is the following air blowing passage 3.
and an air heating passage 4 are formed.

The air blowing passage 3 is a passage leading from the air inlet passage 2 to the upper blowing outlet 5 and the defrosting blowing outlet 6, and each of the blowing outlets 5 and 6 is provided with a mode door 7 and 8.

The air heating passage 4 is provided with a heater core 9 and allows the air from the air inlet passage 2 to be heated therethrough.

Since this heater core 9 is not provided with a water valve for controlling hot water, hot water is constantly supplied.

Further, the tanks on both sides of the heater core 9 are made of a material having high thermal resistance, such as synthetic resin.

The temperature adjustment door 10 is provided at the rear of the air inlet passage 2 and adjusts the passage rate of air from the air inlet passage 2 to the air blowing passage 3 or the air heating passage 4.

That is, when it is on the full hot side, it comes into contact with the upper part of the case 1 and closes the outlet passage 3 as shown by the solid line in the figure, and when it is on the full cool side, the blowout passage 3 is closed. 2 by contacting the contact portion 11 provided on the inlet side of the heater core 9.
The air heating passage 4 is closed at the position A indicated by the dotted chain line.

When the opening is between the opening and the opening, the temperature of the blown air is adjusted by the degree of opening.

The bypass passage 12 is provided on the side of the heater core 9,
Air heating passage 4 and air blowing passage 3 behind heater core 9
It communicates with

This bypass passage 12 is provided with an auxiliary door 13 that opens and closes the bypass passage 12.

This auxiliary door 13 is designed to interlock with the temperature adjustment door 10, and its movement is shown in FIG.

That is, when the temperature adjustment door 10 is in position A (full cool side), the bypass passage 12 is closed and the temperature adjustment door 1 is closed.
The bypass passage 12 is gradually opened according to the degree of opening until the air heating passage 4 is opened by approximately one third.

When the temperature adjustment door 10 moves from approximately one-third or more of the way through the air heating passage 4 to the opening position (full hot side), the bypass passage 12 is completely opened. be.

Therefore, in the maximum cooling mode, the temperature adjustment door 10 is in the position A, and the auxiliary door 13 closes the bypass passage 12, so that the cold air from the artificial air passage 2 reaches the air heating passage 4. completely prevented.

The foot blowing passage 14 is a passage leading from the air heating passage 4 behind the heater core 9 to the foot blowing outlet 15, and a mode door 16 is provided on the entrance side of the foot blowing passage 14.

In the above configuration, in the maximum heating mode, the temperature adjustment door 101. Auxiliary door 13 and each mode door 7,
8.16 is located at the position shown by the solid line in the figure, and the heater core 9
The heated air is blown out from the foot air outlet 15 into the vehicle interior.

On the other hand, in the maximum cooling mode, the temperature adjustment door 10
, the auxiliary door 13 and each mode door 7.16 are located at the positions indicated by two-dot chain lines in the figure, and the cold air sent to the air inlet passage 2 is blown out from the upper air outlet 5 as it is without being heated.

During each mode such as cooling or heating, during so-called air mix, which heats a portion of the cold air to adjust the temperature,
The temperature adjustment door 10 is located between the opening and the opening with an opening degree corresponding to the temperature of the air to be blown out, the auxiliary door 13 opens the bypass passage 12 according to FIG. 2, and each mode door 7.8.16 The position is controlled by the state of each mode.

Therefore, the passage rate of the cold air sent to the air inlet passage 2 to the air blowing passage 3 or the air heating passage 4 is adjusted depending on the opening degree of the temperature adjustment door 10, and a portion of the cold air is heated by the heater core 9 and is bypassed. The mixture is mixed before and after the passage 120, and is blown into the vehicle interior from each outlet 5 or 15.

In this case, the temperature adjustment door 10 connects the air heating passage 4 to the
Since the auxiliary door 13 completely opens the bypass passage 12 when it is opened more than 1/2 of the way, the blowout temperature can be adjusted entirely by the opening degree of the temperature adjustment door 10, and the temperature control lever (not shown) This results in better responsiveness in temperature adjustment.

As described above, according to this invention, in the heater unit of an air conditioner, an auxiliary door that interlocks with the temperature adjustment door is provided in the bypass passage on the side of the heater core, so that when the temperature adjustment door is on the full cool side, Since the bypass passage is closed, backflow to the air heating passage is prevented, and therefore the water valve of the heater core can be omitted, making it possible to provide an inexpensive heater unit.

Further, since the auxiliary door is provided in the bypass passage on the side of the heater core, it is possible to reduce the conduction of heat from the heater core, and it also has the effect of being able to be miniaturized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the heater unit of this invention, and FIG. 2 is a characteristic diagram of the auxiliary door relative to the opening degree of the temperature adjustment door. 1... Case, 2... Air inlet passage,
3... Air blowing passage, 4... Air heating passage, 5... Upper blowing passage, 6... Defrost blowing outlet, 9...・Heater core, 10...
...Temperature adjustment door, 12...Bypass passage, 13...Auxiliary door, 14...Footway outlet, 15...Footway outlet.

Claims (1)

[Claims for Utility Model Registration] 1. An air inlet passage for sucking air, an air outlet passage from this air inlet passage to an upper air outlet and a defrost outlet, and a heater core for discharging air from the air inlet passage. an air heating passage that is heated and passed through; a temperature adjustment door that is provided behind the air inlet passage and adjusts the passage rate of air from the air inlet passage to the air blowing passage or the air heating passage by adjusting the opening degree; A bypass passage that connects the air heating passage behind the heater core and the air blowing passage, and is provided on the side of the heater core, an auxiliary door that opens and closes this bypass passage, and an air heating passage behind the heater core. A foot air outlet passage leading to a foot air outlet is provided in the case, and the auxiliary door is interlocked with the temperature adjustment door, and when the temperature adjustment door is on the full hot side, the bypass passage is opened and the air outlet is on the full cool side. A heater unit for an air conditioner, characterized in that it closes at certain times. 2 For the auxiliary door, the temperature adjustment door is approximately 3
2. The heater unit for an air conditioner according to claim 1, wherein the bypass passage is completely opened when the bypass passage is opened by more than 1/2.