JPS62152919A - Air conditioner formed integrally with air cleaner - Google Patents

Abstract

PURPOSE:To secure the max. effect of air conditioning operation by opening a bypass damper by a damper driving device only in the case when the blow-out air quantity over that in ordinary case is necessary and intaking the additional air quantity through a bypass passage. CONSTITUTION:When a rear cooler switch is turned-ON, a motor 11 drives a blower 12, and the car interior air is inhaled into an intake duct 1, passing through an air cleaner 3 from an air flow inlet 2a, and reaches a coolant evaporator 13 through the blower 12, and is blown out into the car interior from a cold air blow-out port 15. In the cooling-down (max. flow-out air quantity), an electromagnetic selector valve 10 is switched to drive a damper driving device 7. Then, a bypass damper 5 is opened to flow air into the intake duct 1 also from a bypass passage 4. Therefore, in cooling down, the shortage of intake air quantity due to the ventilation resistance of the air cleaner 3 is supplemented, and the cooling efficiency of a rear cooler is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioner integrated with an air purifier, and can be used for air conditioning of a space to be air-conditioned, such as a vehicle cabin.

[Prior Art] In an air conditioner integrated with an air purifier, the air conditioner is equipped with an air purifier, a heat exchanger, and a blower that normally sucks air through the air purifier and blows it out through the heat exchanger into an air-conditioned space. When a larger amount of blown air than normal is required (for example, when maximum cooling is required), various measures have been taken to compensate for the lack of intake air due to the air purifier's ventilation resistance. . The first method, as shown in Japanese Utility Model Publication No. 49-16028, is to install an air purifier movably in the intake passage, and normally the entire amount of intake air passes through the air purifier, but the maximum amount of air is When an amount of air is required, the air cleaner is moved to form a bypass passage between the air purifier and the inner wall surface of the intake passage, and air is sucked through the bypass passage. Second
As shown in Japanese Utility Model Application Publication No. 50-59750, the idea is to fix the air purifier so that a bypass passage is formed at the gate with the inner wall surface of the intake passage, and to install an air purifier on the upstream side of the air purifier. A switching damper is provided, and when the maximum amount of blown air is required, the switching damper is operated so that air is sucked in and flows only through the bypass passage toward the heat exchanger. The third plan is 1976-6
As shown in Japanese Patent No. 1650, a flap valve type damper is provided in the bypass passage, and the damper is opened by the suction force of the blower, so that air is also sucked from the bypass passage.

[Problems to be Solved by the Invention] In the structures according to the first and second proposals, when the maximum amount of air is required, the air is taken in without passing through the air purifier, so the intake air is not purified. The disadvantage is that it is not possible. In addition, in the case of the structure according to the third proposal, the flap valve type damper opens even when the maximum amount of blown air is not required, that is, at normal blower speed, so the intake air There is a problem in terms of air purification because a portion of the amount does not pass through the air purifier.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an air purifier-integrated air conditioner of the above type, in which a bypass passage that does not pass through the air purifier is provided, and a bypass passage that does not pass through the air purifier is provided. A bypass damper that opens and closes is provided, and a power damper driver is further provided that drives the bypass damper to the open position only when a larger amount of blown air than normal is required and keeps it in the closed position during normal times. be.

[Operation] Normally, since the damper driver keeps the bypass damper in the closed position, air is drawn in only through the air cleaner, so all the air blown into the air-conditioned space is purified. And maximum air conditioning (e.g. "
The damper driver opens the bypass damper only when the capacity (cool-down mode) prevails, i.e. when the maximum blown air volume is required, and in addition to the intake air volume passing through the air purifier, the damper driver opens the bypass damper only when the maximum blown air volume is required. An additional amount of air is also drawn in and flows towards a heat exchanger (for example an evaporator for cooling refrigerant).

[Embodiment] Fig. 1 shows an example in which the present invention is applied to a vehicle cooler.
An air purifier 3 made of silica wood is housed in an air purifier case 2. A bypass passage 4 is provided between the inner surface of the air purifier case 2 and the air purifier 3.
is formed, and its upstream end opens to the air inlet 2a, and its downstream end communicates with the intake duct 1 on the downstream side of the air purifier 3. A bypass damper 5 is rotatably provided in the middle of the bypass passage 4 to open and close the bypass passage 4.

A rotating wheel of the bypass damper 5 is attached to the inner surface of the air purifier case 2.

A bracket 6 is fixed to the outer surface of the air purifier case 2 near the bypass damper 5, and a power damper driver 7 is attached to the bracket 6. In the illustrated embodiment, the damper driver 7 comprises a diaphragm actuator connected to a negative pressure source such as an intake pipe (not shown) of an engine mounted on a vehicle through a negative pressure line 8, and the diaphragm of the actuator It is connected to the bypass damper 5 via a link 9. An electromagnetic switching valve 10 is provided in the middle of the negative pressure conduit 8 to switch and connect the damper driver 7 between the negative pressure source and the atmosphere. The switching valve 10 normally applies negative pressure to the damper driver 7,
This causes the damper driver 7 to move the bypass damper 5 to the first position.
It is designed to be kept in the closed position shown by the broken line in the figure. However, when the switching valve 10 is switched to the atmosphere side, atmospheric pressure acts on the diaphragm of the damper driver 7, and the bypass damper 5 rotates to the open position shown by the solid line in FIG. When it opens, air can also flow into the intake duct.

A blower 12 driven by a motor 11 is provided at the downstream end of the intake duct 1, and a heat exchanger consisting of a refrigerant evaporator 13 is provided downstream of the blower 12.
It is housed in 4. The downstream end of the evaporator case 14 serves as a cold air outlet 15.

FIG. 2 shows an electric circuit connected to the solenoid coil 10a of the electromagnetic switching valve 10.
is a blower switch (hereinafter referred to as " damper-linked blower switch), which means that the air mix damper is in both extreme positions (i.e. rH
AX -HOTJ MataharHAX -C00L J k
- The amount of lil is automatically adjusted according to the "old" mode in the figure, the intermediate position, and when it is not so necessary, and is well known. 18 is a front blower control switch installed on the control panel of the vehicle and operated by a passenger, and 19 is a front blower register.

As is clear from FIG. 2, the ground side (e side) terminal of the solenoid coil 10a of the electromagnetic switching valve 10 is connected to the "old" mode terminal 20 of the damper interlocking blower switch 16.

The rear cooler shown in FIG. 1 is operated by starting and stopping the motor 11 of the blower 12 by turning on and off a rear cooler switch (not shown).

Next, the operation of the above embodiment will be explained.

When the rear cooler switch is turned on, the motor 11 drives the blower 12, and as a result, the cabin air flows through the air inlet 2.
As shown by the arrow from a, the air is sucked into the intake duct 1 through the air purifier 3, passes through the blower 12, and reaches the refrigerant evaporator 13, where it exchanges heat with the refrigerant and is cooled. from inside the vehicle. At this time, the front blower control switch 18 of the front air conditioner is operated in the automatic (AUTO) operating mode, and in this operating mode, the damper movement blower switch 16 is in the old position, that is, the so-called "cool down" (maximum blown air volume). ), the coil 10a of the electromagnetic switching valve 10 is energized to drive the switching valve 10 and apply atmospheric pressure to the diaphragm of the damper driver 7. Therefore, the bypass damper 5 is in the solid line position in FIG.
It also flows into the intake duct 1 from the air. In this way, during "cool down" when the maximum amount of air is required, the bypass damper 5 opens to compensate for the lack of suction caused by the ventilation resistance of the air purifier, and the additional air (i.e., air purifier 3) is opened. Since the amount of intake air that is bypassed and flows into the intake duct 1, the cooling capacity of the rear cooler is improved, and the temperature in the vehicle interior drops to the desired set temperature in a short time.

In this state, the damper interlocking blower switch 16 changes from the old position to the normal operating position (one of M, M2, M3).
), the coil 10 of the electromagnetic switching valve 10
a is deenergized and the switching valve connects the damper driver 7 to the negative pressure source. Therefore, the damper driver 7 drives the bypass damper 5 via the link 9 to the position indicated by the dashed line in FIG. 1, that is, to the closed position, and holds it in this position. In this state, the electromagnetic switching valve 1
0 is switched again and continues until atmospheric pressure is applied to the damper driver 7.

As described above, in the illustrated embodiment of the present invention, the damper driver 7 that drives the bypass damper 5 opens and closes the bypass damper 5 of the rear air conditioner in conjunction with the damper interlocking blower switch 16 of the front air conditioner. The rear air conditioner automatically blows out the maximum amount of air in conjunction with the front air conditioner when it is operating at maximum air blowout.

Note that the damper driver 7 used in the above-described embodiments is not limited to the diaphragm type actuator, but may be a driver operated by another power source.

Further, the position of the bypass passage 4 is not limited to between the air cleaner 3 and the air cleaner case 2, and may be provided as an opening in the middle of the intake duct 1.

[Effect 1] As is clear from the above explanation, the bypass damper 5 is normally held in the closed position that closes the bypass passage 4 by the power damper driver, so all the intake air at this time passes through the air purifier 3. It has the effect of being purified by passing through it.

In addition, the bypass damper is driven to the open position by the motorized damper driver only when a higher than normal blown air volume is required, and the additional air volume is sucked in through the bypass passage. This also has the effect of compensating for insufficient intake air due to ventilation resistance and maximizing the air conditioning effect of the air conditioner.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of a vehicle rear cooler embodying the present invention, and FIG. 2 is a circuit diagram showing the solenoid coil of the electromagnetic switching valve of FIG. 1 and the electric circuit for the front air conditioner connected thereto. 1...Intake duct, 3...Air purifier, 4...
・Bypass passage, 5... Bypass damper, 7...
damper driver, 10... switching valve, 12... blower, 13... refrigerant evaporator, 15... cold air outlet.

Claims (1)

[Claims] An air purifier integrated air conditioner comprising an air purifier, a heat exchanger, and a blower that normally sucks air through the air purifier and blows it out through the heat exchanger into an air-conditioned space. A bypass passage that does not pass through the purifier is provided, and a bypass damper is provided to open and close the bypass passage, and the bypass damper is driven to the open position only when a larger amount of blown air than normal is required. An air conditioner integrated with an air purifier, characterized by being equipped with a power damper driver that maintains the device in the closed position.