JPH0573606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field] The present invention relates to a cooling/heating air switching structure for an automotive air conditioner.

[Prior Art] Vehicle interior air conditioners generally have a warm air flow path with a heater interposed that uses engine cooling hot water as a heat source, and a heat exchanger that uses low-temperature refrigerant supplied from an on-vehicle refrigerator as a cold heat source. A blower for blowing air is attached to the inlet or outlet side of the air-conditioning air which opens on both sides of the air-conditioning duct, which is formed by combining a cold air flow path with an evaporator interposed therebetween.

FIG. 6, FIG. 7, and FIG. 8 show three structural examples of conventional automobile air conditioners as side cross-sectional schematic diagrams. 1' is an air conditioning duct, 2' is a heater, 3' is a refrigerant evaporator, and 8' is a suction blower.

The air mix type shown in FIG. 6 lacks a dehumidification mechanism during maximum heating, as is clear from the interlocking relationship between the two dampers 15 and 16, and its structure is relatively complex.

Figure 7 shows the series type, and during dehumidifying heating, all of the introduced air passes through the evaporator 3'.
Wastes refrigeration energy.

Figure 8 shows the air mix type, 17 and 1.
8 is a damper for switching the flow path of the air to be conditioned. Like the series type, this air mix die also wastes a lot of energy.

[Objective of the Invention] The present invention is an air conditioning system for automobiles that has an extremely compact and simple configuration, has a dehumidifying ability even in the strongest heating mode, and dissipates wasteful thermal energy when dehumidifying while heating. The purpose of the present invention is to provide an energy-saving air conditioner that can prevent this as much as possible.

[Structure of the Invention] The automotive air conditioner of the present invention includes an air conditioning duct provided with an inlet for air conditioning air at one end and an outlet for air conditioning air at the other end, and an air conditioner provided in the duct. a warm air flow path, a heater disposed in the warm air flow path, a cold air flow path provided in the duct in parallel with the heating flow path, and a refrigerant evaporator disposed in the cold air flow path; a communication path provided in the duct so as to communicate between the upstream side of the heater and the downstream side of the evaporator; a temperature control damper that adjusts the degree of communication between the outlet of the hot air flow path and the cold air flow path; and a temperature control damper that is provided in the communication path, and when the temperature control damper is operated to block cold air, the communication path is opened. It consists of a damper for opening and closing the flow path that acts on the opposite side.

According to a preferred embodiment of the present invention, the damper for opening and closing the communication passage and the damper for temperature control share one damper rotation shaft, and the damper for opening and closing the passage is arranged on one side of the axis of the rotation shaft. It consists of a damper and a temperature control damper attached on the opposite side.

[Effect of the invention] The automotive air conditioner having the above configuration has the following features:
It has the following effects.

B The air conditioner for an automobile of the present invention includes a communication path provided between the upstream side of the heater and the downstream side of the evaporator, and a damper for opening and closing the flow path provided in the communication path, and for temperature control. When the damper is operated to block cold air, the opening/closing tamper is operated to the side that opens the communication path, making it possible to perform heating with dehumidification with a small and simple configuration. In this case, the amount of air passing through the evaporator can be smaller than in conventional air conditioners, preventing wasted energy for heating and cooling. Also,
Dehumidification is possible even when the heating is at its maximum.

[Example] Next, an automotive air conditioner according to the present invention will be described based on an example shown in the drawings.

Figures 1 to 3 are side sectional views illustrating the structure and operating conditions of the air conditioner of the present invention. , a warm air flow path c with a heater 2 interposed therebetween and a cold air flow path d with an evaporator 3 interposed therebetween are formed in a parallel relationship. And heater 2
A communication path 4 connecting the upstream side of the evaporator 3 and the downstream side of the evaporator 3 is provided, and this communication path 4 can be opened and closed by a flow path opening/closing tamper 5. Further, a temperature control damper 6 that controls the communication relationship between the hot air flow path c and the cold air flow path d is installed downstream of the heater 2 and the evaporator 3. This downstream region functions as a mix basin for warm and cold air. In this embodiment, a flow path opening/closing damper 5 and a temperature control damper 6 are used.
share one rotating shaft 7, a damper 5 for opening and closing the flow path is attached to one side on the axis of the rotating shaft 7, and a tamper 6 for temperature control is attached to the other side.
In this case, both dampers 5 and 6 are located on the same plane, but if necessary, the mounting angle of both dampers 5 and 6 with respect to the rotating shaft 7 may be set to an angle other than 180 degrees. Reference numeral 8 represents a blower for sucking air for air conditioning, and reference numeral 9 represents an internal/external air inlet switching damper.

Next, to explain the operation of the air conditioner as described above, Fig. 1 shows the state of maximum cooling, in which the communication passage 4 is completely closed by the damper 5 for opening and closing the crown passage, and the temperature is controlled. The warm air flow path c is completely blocked by the damper 6. Therefore, all the air introduced into the air conditioning duct 1 is transferred to the evaporator 3.
pass through.

Next, in FIG. 2, which shows the case of air mixing, that is, when heating air and cooling air are appropriately mixed and sent to the outlet, the temperature control tamper 6 and the flow path opening/closing damper 5 of the communication path 4 are connected. By changing the rotational position, a portion of the introduced air passes through the evaporator 3, and warm air with a dehumidifying effect is performed.
In this case, the mounting positions of the communication path 4, the flow path opening/closing damper 5, and the temperature control damper 6, and both dampers 5, 6
Since the amount of air passing through the evaporator 3 can be reduced compared to conventional air conditioners due to the relationship between the operations of the evaporator 3, unnecessary wastage of heating and cooling energy can be prevented.

Figure 3 shows the strongest heating state, and the temperature control damper 6 is in the completely cut off position for cold air blowing, but since the communication path 4 is in the open state, some of the introduced air is After passing through the evaporator 3 at one end and being dehumidified, the direct path to the outlet b is cut off, the air passes through the communication path 4, and returns to the upstream side of the heater 2. Reference numeral 12 represents a conditioned air outlet, and 13 and 14 designate dampers for switching the air outlet 12.

In the embodiment shown in FIG.
is provided on the outlet side of the air conditioning duct 1.

FIG. 5 is a side sectional view of an air conditioner showing another embodiment of the device of the present invention, in which the flow passage opening/closing damper 5' of the communication passage 4' and the temperature control damper 6' are integrated. The dampers 5' and 6' are attached to each of the rotating shafts 10 and 11 without being connected to each other, and the two dampers 5' and 6' are in a special interlocking relationship as shown in the figure.
That is, when the temperature control damper 6' is at the warm air blow-off cutoff position e, the flow path opening/closing damper 5' occupies the position e', which completely closes the communication path 4', and all the introduced air flows through the evaporator 3. When the strongest cooling condition is reached and the temperature control damper 6' is at the cold air blow-off cutoff position f, the flow path opening/closing damper 5' is fully open at a position f' parallel to the evaporator 3, and one of the introduced air is After passing through the detour through the evaporator 3, all the air passes through the heater 2, resulting in the strongest heating condition accompanied by a dehumidifying effect. When the temperature control damper 6' and the flow path opening/closing damper 5' occupy intermediate positions between the above positions, for example, positions g and g', a moderate temperature control system with dehumidification in which cool air and warm air are appropriately mixed is provided. Heating or cooling can be achieved. In this case, due to the operational positional relationship of the flow passage opening/closing damper 5' and the temperature control damper 6', compared to the conventional air mix type air conditioner, a large amount of air is not allowed to pass through the evaporator uselessly. Therefore, the operation time of the refrigerator, which is operated by the driving force of the engine, can be reduced by using a magnetic clutch that is switched on and off depending on the temperature detected by the thermistor attached to the evaporator. The purpose of energy saving is achieved.

[Brief explanation of the drawing]

1 to 3 are side sectional views illustrating the structure and operating conditions of the air conditioner of the present invention, and FIG. 4 and 5 are side sectional views showing another embodiment of the present invention, respectively. 6 to 8 are conceptual diagrams illustrating the structures and operating conditions of conventional air conditioners for three types of products, respectively. In the figure, 1, 1'... air conditioning duct, 2, 2'...
Heater, 3, 3'... Evaporator, 4, 4'... Communication path, 5, 5'... Tamper for opening/closing flow path, 6, 6'...
Temperature control damper, 7... Rotation shaft of dampers 5 and 6, 8, 8'... Suction blower, 9... Internal/external air intake switching damper, 12... Conditioned air outlet,
c...Hot air flow path, d...Cold air flow path, e~g...Damper position.

Claims (1)

[Claims] 1. An air conditioning duct having an air conditioning air inlet at one end and an air conditioning air outlet at the other end;
A warm air flow path provided in the duct, a heater disposed in the warm air flow path, a cold air flow path provided in the duct in parallel with the heating flow path, and a heater provided in the cold air flow path. a refrigerant evaporator, a communication path provided in the duct to communicate between an upstream side of the heater and a downstream side of the evaporator, and a communication path provided in the duct downstream of the heater and the evaporator. a temperature control damper attached to the air conditioning air outlet and adjusting the degree of communication between the hot air flow path and the cold air flow path; An automatic air conditioner comprising a flow path opening/closing damper that operates on the side that opens the communication path. 2. The flow path opening/closing damper and the temperature control damper share one damper rotation shaft, and the flow path opening/closing damper is mounted on one side of the rotation shaft, and the temperature control damper is mounted on the opposite side. An air conditioner for an automobile according to claim 1, characterized in that: