WO2017182326A1

WO2017182326A1 - Device and method for setting the temperature in a space, in particular in a vehicle interior

Info

Publication number: WO2017182326A1
Application number: PCT/EP2017/058646
Authority: WO
Inventors: Christian Bäcker; Georg Habbel
Original assignee: Webasto SE
Priority date: 2016-04-18
Filing date: 2017-04-11
Publication date: 2017-10-26
Also published as: DE102016107116A1

Abstract

The invention relates to a device for setting the temperature in a space (21), in particular in a vehicle interior, comprising at least one temperature sensor (23) for sensing an actual temperature value in the space (21), an operating unit (24) for setting the temperature in the space (21), a releasing device (22) for releasing heat and/or cold into the space (21), and a control unit (25), which is configured for selection between a first and a second mode, wherein the control unit (25) is configured in such a way that the control unit controls the temperature in the space (21) by comparing a target temperature value specified by the operating unit (24) with the actual temperature value in the first mode and controls a heat input and/or cold input in accordance with a setting of the operating unit (24), but without regard to an actual temperature value determined by the temperature sensor (23), in the second mode.

Description

Device and method for adjusting the temperature in a room, in particular in a vehicle interior

description

The invention relates to a device and a method for adjusting the temperature in a room, in particular a vehicle interior.

In the prior art control devices for the air conditioning of a room, such as a vehicle cabin are known in which a

Temperature sensor detects an indoor temperature (cabin temperature). One

Setpoint generator (eg a dial) generates a setpoint for the indoor temperature (cabin temperature). By comparing setpoint and actual temperature, a (comfortable) room climate can be adjusted.

The problem here is that the regulation of the indoor climate is dependent on the functioning of the sensor. In general, the prior art controllers are prone to malfunction.

It is therefore an object of the present invention to provide a device and a method for adjusting the temperature in a room, wherein an adjustment of the temperature should also be possible when malfunction occurs, especially the temperature sensor no longer

(correct) works.

This object is achieved by a device for adjusting the temperature in a room, in particular in a vehicle interior (vehicle cabin), comprising at least one temperature sensor for detecting an actual temperature. Temperature value in the room, a control unit for setting the

Temperature in the room, a dispenser for delivering heat and / or cold into the room and a control unit which is configured to select between a first and a second mode, wherein the

Control unit is configured so that it controls the temperature in the room in the first mode by comparing a predetermined by the control unit setpoint temperature value with the actual temperature value and in the second mode, a heat and / or cold entry depending a setting of the operating unit, but independent of a detected by the temperature sensor actual temperature value controls.

A central idea of the invention is to provide a Notlauffunktion (emergency mode or second mode), in spite of a malfunction of the

Temperature sensor or other for controlling the temperature

provided device a control of the indoor environment is made possible.

In general, under the first mode, a normal (operating) mode

Under the second mode, an emergency mode that should be selected only in exceptional situations. In the first mode (normal mode), the control unit operates analogously to the prior art and thus regulates the room temperature in a known manner. In the second mode (emergency mode), however, the control unit operates independently of the temperature sensor, so that no (real) control, but only a control takes place. In general, under "control" in the usual way, a control with

Feedback (close-loop-control). As far as a "control" is mentioned, this is to be understood as a generic term for a control with feedback or without feedback (open-loop control), but preferably as a control without feedback (open-loop control). Refrigeration "is a corresponding heat absorption by the" dispenser "to understand (heat absorption from the room,

in particular the vehicle interior). As a result, even with a faulty room temperature sensor, an adjustment of the temperature can be realized by (same) operating unit (intuitively). The user needs that

Switching between the individual modes is not (necessarily) realized. It may continue to operate the same control unit and the temperature adjustment device will respond in the same (or at least similar) manner. The device for adjusting the temperature preferably comprises a device for detecting a malfunction of the temperature sensor or another device provided for regulating the temperature. More preferably, the control unit is configured to switch from the first to the second mode upon detection of a malfunction. In principle, however, it is also conceivable that it is possible to switch manually to the second mode (emergency mode), for example if the user determines that the device for adjusting the temperature does not (reasonably) work. However, a means for (automatically) detecting a malfunction further simplifies the operation. Even if the temperature sensor fails, at least one controlled room temperature is ensured by the proposed "emergency running property." This emergency function is uncomplicated and takes into account the intuitive behavior of the user.

In a specific embodiment, the control unit is configured to transpose an absolute desired temperature value selected in the operating unit for regulating the temperature in the first mode into a relative temperature value for controlling the temperature in the second mode. The

The control unit can therefore have an absolute setpoint temperature value (of, for example, 18 ° C.) given by the operating unit as a selection between a possible range (of, for example, 10-30 ° C.) and a relative value (of

for example, 40) within a range of, for example, 0-100). The adjustment range of the operating unit (setpoint generator) in the first mode is thus transposed into a relative signal range (of 0-100, for example). The operating range of the dispenser (of actuators) can also be used to control the heat and / or refrigeration in the room to a relative

Normalized signal range, the limits of this normalized

Signal area may possibly be identical to those of the adjustment range of the operating unit (the setpoint generator).

The operating unit may comprise an adjusting device, such as a switch and / or knob, in particular rotary knob, and / or a touch screen, in particular in the first mode, a target temperature value within a range between a maximum and a minimum target temperature value pretend. In general, the invention is also advantageous, although the

Temperature sensor per se still works, but any other necessary for control component, such as a component for the feedback of a signal of the temperature sensor, is faulty.

Preferably, the setting of the temperature in the second mode is performed by the same operating unit (so that the user can not in principle determine in which mode the control unit is currently working).

In a specific embodiment, the dispensing device comprises a valve, which can be flowed through by a heat exchange fluid, wherein the valve can be controlled by the control unit. This allows control of the heat and / or cooling output in a structurally simple manner.

In the first mode, preferably by the operating unit (continuous or discontinuous), a setpoint temperature value within a range defined by a minimum and a maximum setpoint temperature value can be specified. Alternatively or additionally, in the second mode

preferably by the operating unit (continuous or discontinuous), a relative temperature value can be achieved within a range defined by a minimum and a maximum relative temperature value.

Generally, by the control, in particular regulation, a setting of more than 2, in particular more than 3, more preferably more than 5

different values (the controlled / controlled variable, eg temperature, opening degree of a valve, heat release etc.).

The above object is further achieved by a method for adjusting the temperature in a room, in particular in a vehicle interior, preferably using the device of the type described above, wherein at least one temperature sensor detects an actual temperature value in the room, wherein heat and / or cold is discharged into the room, wherein a control unit changes from a first to a second mode when a malfunction of the temperature sensor is detected, wherein in the first mode, the temperature in the room by comparing a predetermined by the operating unit target temperature Value is controlled with the actual temperature value and in the second mode, a heat and / or cold entry depending on a setting of the operating unit, but independent of a detected by the temperature sensor actual temperature value is controlled.

The control unit preferably transposes an absolute desired temperature value selected in the operating unit for regulating the temperature in the first mode into a relative temperature value for controlling the temperature in the second mode. Further preferably, the control unit controls a valve, which is traversed by a heat exchange fluid, for controlling and / or regulating the temperature in the room.

The valve (which ultimately controls the entry of thermal energy into the room) can be acted upon (in the second mode, emergency mode) with a relative (percentage) signal. If the PMV (predicted mean vote) of the room is rated smaller than a neutral mean value, for example 0, an adjustment of the operating unit (eg of a setpoint generator) can be expected by a person or facility observing in space or observing this space , which causes an adjustment of the operating position of the Verntils. Thereby, a flow increase of a heat transfer medium can be effected by means for exchanging thermal energy with the room, which causes an increase of the entry of the thermal energy into the room.

If, on the other hand, the PMV of the air-enclosing area is rated greater than a neutral average value, for example 0, an adjustment of the operating unit (of the setpoint generator) of the control device can be reckoned by a person or facility observing in space or observing this space, which is a Adjusting the operating position of the valve causes a flow reduction of a

Heat transfer medium is provided by means for exchanging thermal energy with the air-enclosing area, which causes a lowering of the entry of the thermal energy of the air-enclosing area.

Further embodiments emerge from the subclaims.

The invention will be described with reference to an embodiment which is explained in more detail with reference to the figures. Hereby show:

1 shows a partial step of a first step for the conversion of a

Temperature setpoint in a relative signal; FIG. 2 shows a further partial step of the first step; FIG.

3 shows a further partial step of the first step;

4 shows a second step of controlling a valve for adjusting the temperature in a vehicle interior; and

Fig. 5 is a schematic representation of a device for adjusting the

Temperature in a room.

In the following description, the same reference numerals are used for identical and equivalent parts.

Figs. 1 and 2 show the calculation of coefficients a and b. Fig. 3 shows the conversion of a (for example via a setpoint generator in the

Vehicle cabin) predetermined temperature setpoint in a relative

(percentage) signal. In detail, according to FIG. 1, a difference between a maximum valve position (VIvPos max) and a minimum valve position (VIvPos min) is formed according to position 10. The maximum valve position is

For example, 100, the minimum valve position, for example 0. Generally, the valve mentioned here is a valve that controls (or regulates) the flow rate of a heat exchange fluid. In the maximum valve position, the flow is greatest, in the minimum valve position the lowest

(for example, 0). In this respect, the heat or cooling output is greatest in the maximum valve position and smallest in the minimum valve position (eg 0). Furthermore, according to item 11 in FIG. 1, a difference between a maximum adjustable setpoint temperature value (T_Set_Max) and a minimum predefinable setpoint temperature value (T_Set_Min) is formed. According to position 12 in FIG. 1, the difference according to position 10 is divided by the difference according to position 11 and thereby the coefficient a is determined.

According to FIG. 2, the coefficient a for determining the coefficient b is first inverted at position 13 and then with the minimum presettable

Temperature value T_Set_Min multiplied, at position 14. The result of this multiplication is the coefficient b. Overall, this satisfies the following equation (provided that the maximum valve position is set to a value of 100 and the minimum valve position is set to a value of 0): y = a * x + b, where y = MFD_T_Set_percent [%] and x = MFD_T_Set_ [° C].

An implementation of the determination of y is shown in FIG. 3. First, at position 15, the coefficient a with the target temperature value of

Setpoint adjuster multiplied. The result will be at position 16 to the

Coefficients b added. At position 17 (optionally) a range can be defined (above or below) the value y should no longer increase or decrease (saturation). The result from position 16 (and optionally 17) is then the value y, ie a percentage (temperature) signal. All in all, an absolute temperature (in ° C) is converted into a percentage signal (in percent).

Fig. 4 then shows the control of the valve in an error case (for example, a malfunction of the temperature sensor) by the percentage (temperature) signal. If an error is detected at position 18, a switch 19 switches to control a valve position 20 (in this example "1") according to the percentage (temperature) signal. In this "emergency mode", the valve position (Vlv Pos) so not adjusted by comparing an actual value with a target value (as would be the case in normal mode).

Fig. 5 shows schematically a device for adjusting the temperature in a room 21. The room 21 is heated or cooled by a dispenser 22 for delivering heat and / or cold into the room. Furthermore, a temperature sensor 23 is provided which measures the temperature in the room. A setpoint temperature value can be preset via an operating unit 24 (eg rotary switch). In the normal mode controls a control unit 25 by means of an input from the temperature sensor 23 and the control knob 24, the heat resistance. Refrigerant delivery by the dispenser 22. Concretely, this is a

Valve 26 of the dispenser 22 further opened (to increase the heat or cooling release) or further closed (to reduce the heat and / or refrigeration). The valve 26 controls the flow of a heat exchange fluid.

It should be noted at this point that all the above-described parts taken alone and in any combination, in particular the details shown in the drawings, are claimed as essential to the invention.

Variations thereof are familiar to the person skilled in the art.

reference numeral

1-18 position

19 switches

20 valve position

21 room (vehicle interior)

22 dispenser

23 temperature sensor

24 operating unit

25 control unit

26 valve

Claims

claims

1. Device for adjusting the temperature in a room (21),

in particular in a vehicle interior, comprising at least one temperature sensor (23) for detecting an actual temperature value in the room (21), an operating unit (24) for adjusting the temperature in the room (21), a dispenser (22) for delivering heat and / or cold into the room (21) and a control unit (25) configured to choose between a first and a second mode,

wherein the control unit (25) is configured to

in the first mode, the temperature in the room (21) by comparing a predetermined by the operating unit (24) predetermined temperature value with the actual temperature value controls and

in the second mode, a heat and / or cold entry depending on a setting of the operating unit (24), but independent of a detected by the temperature sensor (23) actual temperature value, controls.

2. Apparatus according to claim 1,

d a d u r c h e c e n c i n e s that

a device for detecting a malfunction of the temperature sensor and / or other intended for the regulation of the temperature Device is provided, wherein the control unit (25) is preferably configured so that it switches on detection of a malfunction of the first in the second mode.

Apparatus according to claim 1 or 2,

d a d u rch e ke n ze i c h n et that

the control unit (25) is configured to set an absolute desired temperature value selected in the operating unit (24) for controlling the temperature in the first mode to a relative, in particular percentage, temperature value for controlling the temperature in the second mode

transposed.

Device according to one of the preceding claims,

d a d u rch e ke n ze i c h n et that

the operating unit (24) an adjusting device, such as a switch and / or knob, in particular knob, and / or a

In the first mode, the touch screen comprises a target temperature value within a range between a maximum and a minimum setpoint temperature value.

Device according to one of the preceding claims,

d a d u rch e ke n ze i c h n et that

the dispensing device (22) comprises a valve (26) through which a heat exchange fluid can flow, the valve (26) being controllable by the control unit (25).

Device according to one of the preceding claims,

d a d u rch e ke n ze i c h n et that

in the first mode by the operating unit (24) continuously or

discontinuous a target temperature value within a, defined by a minimum and a maximum target temperature value,

Range can be specified and / or

in the second mode by the operating unit (24) continuously or discontinuously a relative temperature value within a, defined by a minimum and a maximum relative temperature value,

Range can be specified.

7. A method for adjusting the temperature in a room, in particular in a vehicle interior (21), preferably using the device according to one of the preceding claims, wherein at least one temperature sensor (23) has an actual temperature value in the space (21 ), wherein heat and / or cold is discharged into the space (21), wherein a control unit (25) changes from a first to a second mode when a malfunction of the temperature sensor (23) is detected,

wherein in the first mode, the temperature in the space (21)

Comparison of a predetermined by the operating unit (24) setpoint temperature value with the actual temperature value is controlled and

in the second mode, a heat and / or cold entry depending on a setting of the operating unit (24), but independently of a detected by the temperature sensor (23) actual temperature value is controlled.

8. The method according to claim 7,

d a d u rch e ke n ze i c h n et that

the control unit (25) transposes an absolute target temperature value selected in the operating unit (24) for regulating the temperature in the first mode into a relative, in particular percentage, temperature value for controlling the temperature in the second mode.

9. The method according to claim 8 or 9,

d a d u rch e ke n ze i c h n et that

the control unit (25) actuates a valve (26) through which a heat exchange fluid can flow in order to control and / or regulate the temperature in the space (21).