JPH10278550A - Method and device for adjusting mixed air in air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for supplying fresh and/or ambient air to an air conditioner and optimizing energy consumption for the air conditioner of an automobile by improving a device for adjusting mixed air in the air conditioner of the automobile. SOLUTION: A fresh air valve 2 and an ambient air valve 3 are arranged in the air conditioner of an automobile 1, and the air induced is made to move to a heat exchanger 6 by a ventilator 4, and in such constitution, temperature sensors 2a, 3a and 5a and humidity sensors 2b, 3b and 5b are arranged in fresh air flow, ambient air flow and/or mixed air flow respectively, and these sensors send suitable signals for regulating characteristic enthalpy to an air conditioner 7, and the fresh air valve 2 and the ambient air valve 3 are adjusted based on the in herent enthalpy by these signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for producing fresh air and / or fresh air.
Alternatively, the invention relates to a method for regulating the mixed air in an air conditioner of a motor vehicle, which supplies ambient air to the air conditioner, and to a device for implementing this method.

[0002] In automotive air conditioners that are common today, fresh air or ambient air is selectively supplied by an air conditioner in order to purify the air with a ventilation fan.

[0003] With the increasing demand for comfort, it has been desired in an air conditioner for a vehicle to automatically adjust the temperature inside the vehicle so that the occupant feels as comfortable as possible in the vehicle. In this case, the temperature inside the vehicle is generally measured by a temperature sensor, and a desired temperature is adjusted by a control device. This is usually energy-rich fresh air supplied by the air conditioner heat exchanger during continuous operation. In this case, no choice is made between fresh air or ambient air in order to always optimize the energy.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for optimizing energy consumption for a motor vehicle air conditioner.

[0005]

According to the method of the invention which solves this problem, the specific enthalpy of the fresh air and the ambient air and / or the mixed air is defined and compared with a predetermined specific enthalpy. Later, the supply of fresh air and ambient air was adjusted so that the mixed air each had a good enthalpy of good energy.

[0006]

An advantage of the invention is that an automatically regulated, energetically favorable mixture of air is supplied to the heat exchanger of the air conditioner.
In particular, a completely automatic selection between energetically good fresh air or ambient air is thus obtained in the measured air conditioning zone.

By comparing the intrinsic enthalpy of the mixed air supplied directly to the heat exchanger with the intrinsic enthalpy of the fresh air, a particularly precise regulation of the fresh air flow and the ambient air flow is possible.

According to an embodiment of the invention, the supply of fresh air and ambient air and / or mixed air is such that, after a comparison of the specific enthalpies, the respective minimum specific enthalpy difference is adjusted in the heat exchanger. Is controlled.

[0009] Advantageously, the inherent enthalpy is determined by measuring the temperature and the relative humidity.
Alternatively, the intrinsic enthalpy can also be measured via humidity temperature.

In order to ensure that fresh air is sufficiently supplied to the occupants present in the vehicle, the target air volume is selected according to the number of occupants present in the vehicle.

According to an apparatus for implementing the method according to the invention, a fresh air valve and an ambient air valve are arranged in an air conditioner of a motor vehicle, and the introduced air is moved to a heat exchanger by a ventilation device. In this case, a temperature sensor and a humidity sensor are arranged in the fresh air stream, in the ambient air stream, and / or in the mixed air stream, each of which has its own sensor. A corresponding signal for determining the enthalpy is sent to the air conditioner, which adjusts the fresh air valve and the ambient air valve based on the specific enthalpy.

This makes it possible to simply implement the method according to the invention by means of the known means present in each air conditioner. In particular, by providing a microcomputer as an adjusting device, the specific enthalpy can be easily defined using appropriate software.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The drawings show the means required for the method according to the invention of a vehicle air conditioner.

In the air conditioner 1, a fresh air valve 2 for supplying fresh air and a ventilation valve 3 for regulating the supply of ambient air from an automobile are arranged.

Ambient air and fresh air are supplied by a ventilator 4 and are simultaneously swirled. Thereby, the mixed air 5 is formed. This mixed air 5 is supplied to a heat exchanger 6 and sent from the heat exchanger 6 to the interior of the vehicle during cooling.

The required cooling efficiency of the heat exchanger 6 of the air conditioner 1 is obtained from the product of the inherent enthalpy difference between the inlet and the outlet of the air to be cooled by the heat exchanger, and the air flow rate by the heat exchanger. .

To regulate the optimal efficiency of the heat exchanger 6 of the air conditioner 1, the specific enthalpy of the fresh air and the ambient air is defined.

Alternatively, the inherent enthalpy of the fresh air and the inherent enthalpy of the mixed air 5 are converted into heat exchangers 6.
Can also be compared before.

To this end, a temperature sensor 2a and a relative humidity 2b near the fresh air valve 2 are provided in the fresh air flow.
And a sensor for the same.

A temperature sensor 3a and another sensor for relative humidity 3b are arranged near the ambient air valve 3. Temperature sensors 2a, 3a and moisture sensors 2b,
The signal of 3b is supplied to the air conditioner 7 to calculate the intrinsic enthalpy for fresh air and ambient air.

The detected intrinsic enthalpies of the fresh air and the ambient air thus detected are compared with one another. Based on this comparison, the fresh air valve 2 and the ambient air valve 3 are opened so that the minimum enthalpy difference in the heat exchanger 6 is adjusted. In this case, the different opening times of each valve can be adjusted immovably.

As described above, the third temperature sensor 5a and the third humidity sensor 5b are connected to the ventilation device 4 in the mixed air flow 5.
Is located behind. The measurement results of these sensors are also supplied to the air conditioner 7. Air conditioner 7 is mixed air 5
Calculate the intrinsic enthalpy of. Depending on the accuracy of the adjustment, the ambient air valve and the fresh air valve are defined based on the enthalpy values of fresh air and ambient air or the enthalpy values of fresh air and mixed air.

To fine-tune the adjustment, the air conditioner 7
It is also conceivable to simultaneously process the signals of the sensors in the ambient, fresh and mixed air streams.

In order to guarantee the minimum required fresh air for the occupants, 20% to 80%, depending on the number of vehicle occupants.
A target fresh air content of up to% is set.

In order to determine how many occupants are in the vehicle, the electrical contacts provided on the buckle mechanism of the vehicle seat and the safety belt are interrogated by the air conditioner 7 and the target fresh air The volume is adjusted.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an apparatus according to the present invention.

[Explanation of symbols]

1 air conditioner, 2 fresh air valve, 2a temperature sensor, 2b humidity, 3 ambient air valve, 4 ventilator, 5 mixed air, 5b air humidity sensor, 6
Heat exchanger, 7 air conditioner

Claims (9)

[Claims] 1. A method for regulating a mixture of air in an air conditioner of a motor vehicle, in which fresh air and / or ambient air is supplied to the air conditioner, comprising: Adjusting the supply of fresh air and ambient air such that the mixed air each has a energetically good intrinsic enthalpy after defining and comparing it with a predetermined intrinsic enthalpy, Method for adjusting the mixed air in the air. 2. The method as claimed in claim 1, further comprising, after comparing the plurality of specific enthalpies, adjusting the supply of fresh air as well as the ambient air so that the minimum specific enthalpy difference is adjusted in the heat exchanger. . 3. To define a specific enthalpy,
3. The method of claim 1, wherein the temperature and relative humidity are measured.
The described method. 4. The method according to claim 1, wherein the specific enthalpy is defined by the wet bulb temperature. 5. The method according to claim 1, wherein a predetermined target fresh air content is supplied to the air conditioner. 6. The method of claim 5, wherein the target fresh air content is selected based on the number of occupants present in the vehicle. 7. An apparatus for carrying out the method according to claim 1, wherein a fresh air valve (2) and an ambient air valve (3) are arranged and introduced in the vehicle air conditioner (1). The ventilated air (4) transfers the exhausted air to the heat exchanger (6), with one temperature sensor in each of the fresh air stream, the ambient air stream and / or the mixed air stream. (2a, 3a, 5a) and humidity sensors (2b, 3b,
5b) and these sensors send corresponding signals to the air conditioner (7) for defining the specific enthalpy, which signals the fresh air valve (2) and the ambient air valve (3). A) for adjusting the mixed air in the air conditioner, wherein the adjustment is based on a specific enthalpy. 8. A temperature sensor (5a) for the mixed air flow (4).
Device according to claim 7, wherein the humidity sensor (5b) is arranged behind the ventilation fan (4). 9. The device according to claim 7, wherein the air conditioner is connected to a sensor for detecting an occupant in the motor vehicle.