METHOD FOR OPERATING A DEVICE FOR THE THERMAL CONDITIONING OF A MOTOR VEHICLE INTERIOR AND DEVICE FOR IMPLEMENTING THE METHOD

• US 20170291471A1
• Filed: 11/13/2015
• Published: 10/12/2017
• Est. Priority Date: 11/25/2014
• Status: Active Application

• Current Assignee: Valeo Systemes Thermiques (Valeo SE)
• Original Assignee: Valeo Systemes Thermiques (Valeo SE)
• Inventors: Jovet, Bastien, Ailloud, Fabrice, Ladrech, Frdric, Pierres, Philippe
• Granted Patent: US 10,266,036 B2
• Time in Patent Office: Days
• CPC Class Codes: B60H 1/00835 Damper doors, e.g. position control construction or arrangement of damper doors B60H1/00664; B60H1/00864 takes precedence
• CPC Class Codes: B60H 1/3211 for increasing the efficiency of a vehicle refrigeration cycle
• CPC Class Codes: B60H 2001/3238 related to the operation of the compressor
• CPC Class Codes: B60H 2001/3282 to control the air flow

Abstract

The invention relates to a method for operating a device for the thermal conditioning of a motor vehicle interior, comprising: a refrigerant circuit comprising a compressor (C) and a heat exchanger (2) able to form an evaporator, the heat exchanger (2) being able to exchange heat with a flow of air intended to be conditioned, at least one bypass means (V1) able to divert from the heat exchanger (2) at least part of said air flow and which can be controlled in terms of position between the closed position in which no flow is diverted from the heat exchanger (2) and a multitude of open positions in which part of the flow is diverted from the heat exchanger (2) according to the position of opening, a mixing zone (ZM) for mixing the flow that has passed through the evaporator (2) and the flow of air diverted by the bypass means (V1) so as to obtain an air flow at a setpoint temperature.

Claims

1. A method for operating a device for the thermal conditioning of a motor vehicle interior, comprising:

exchanging heat with a flow of air configured to be conditioned by a refrigerant circuit comprising a compressor and a heat exchanger forming an evaporator;

diverting, from the heat exchanger and by at least one bypass means, at least part of said flow of air, the at least one bypass means having the ability to be controlled between a closed position, in which no flow is diverted from the heat exchanger, and a plurality of open positions, in which part of the flow is diverted from the heat exchanger on the basis of one of the plurality of open positions;

mixing the flow of air that has passed through the evaporator and the flow of air diverted by the bypass means to obtain a flow of air at a setpoint temperature; and

operating the compressor in a cyclical manner having a period of operation in a first state, in which the compressor generates together with the heat exchanger a first quantity of frigories, alternating with a period of operation in a second state, in which the compressor generates together with the heat exchanger a second quantity of frigories lower than the first quantity,

wherein the position of the bypass means is controlled in a cyclical manner consistent with the first and second state periods of operation of the compressor.

2. The method as claimed in claim 1, wherein the open position of the bypass means is controlled on the basis of at least one control law pre-established on the basis of the outlet temperature from the heat exchanger.

3. The method as claimed in claim 2, wherein the control law is a function which decreases monotonically.

4. The method as claimed in claim 3, wherein the control law is recorded in a memory of a control unit.

5. The method as claimed in claim 1, wherein the bypass means are controlled in a cyclical manner between an open position and a closed position, and wherein the duration of the period in the open position is longer than the operating period in the first state of the compressor.

6. The method as claimed in claim 1, wherein the bypass means move from a closed position to an open position when the compressor moves from an operating period in the second state to an operating period in the first state.

7. The method as claimed in claim 2, wherein the temperature at the outlet from the heat exchanger is measured with the help of a temperature probe, and the open position and the closed position of the bypass means are controlled on the basis of the control law and the measured temperature.

8. The method as claimed in claim 1, wherein the compressor is a clutchless variable displacement compressor, and wherein the first operating state corresponds to an operation with a high displacement, and the second operating state corresponds to an operation with a lower displacement than in the first state.

9. The method as claimed in claim 1, wherein the compressor is a clutchable compressor, and the first operating state corresponds to a clutched state of the compressor, and the second operating state corresponds to a declutched state of the compressor.

10. A device for the thermal conditioning of a motor vehicle interior, comprising:

a refrigerant circuit comprising a compressor and a heat exchanger configured to form an evaporator, the heat exchanger being configured to exchange heat with a flow of air intended to be conditioned;

at least one bypass means configured to divert from the heat exchanger at least part of said flow of air and configured to be controlled between a closed position, in which no flow is diverted from the heat exchanger, and a plurality of open positions, in which part of the flow is diverted from the heat exchanger on the basis of one of the plurality of open positions;

a mixing zone for mixing the flow of air that has passed through the evaporator and the flow of air diverted by the bypass means so as to obtain a flow of air at a setpoint temperature; and

a control unit configured to cause the compressor to operate in a cyclical manner having a period of operation in a first state, in which the compressor generates together with the heat exchanger a first quantity of frigories, alternating with a period of operation in a second state, in which the compressor generates together with the heat exchanger a second quantity of frigories lower than the first quantity,

wherein the control unit is also connected to the bypass means to control the position of the bypass means in a cyclical manner consistent with the first state and second state periods of operation of the compressor.

11. The device as claimed in claim 10, wherein the open position of the bypass means is controlled on the basis of at least one control law pre-established on the basis of the outlet temperature from the heat exchanger.

12. The device as claimed in claim 10, wherein the control unit is configured to control the bypass means in a cyclical manner between an open position and a closed position, and the duration of the period in the open position is longer than the operating period in the first state of the compressor.

13. The device as claimed in claim 10, wherein the control unit is configured to control the bypass means to move from a closed position to an open position when the compressor moves from an operating period in the second state to an operating period in the first state.

14. The device as claimed in claim 10, further comprising a temperature probe for measuring the temperature at the outlet from the heat exchanger, wherein the control unit is connected to the temperature probe and is configured to control the open and the closed positions of the bypass means on the basis of the control law and the temperature measured by the temperature probe.

15. The device as claimed in claim 14, wherein the temperature probe is disposed downstream of the heat exchanger in a manner that is protected in relation to the flow of air originating from the bypass means.

16. The device as claimed in claim 10, wherein the compressor is a clutchless variable displacement compressor, and wherein the first operating state corresponds to an operation with a high displacement and the second operating state corresponds to an operation with a lower displacement than in the first state.

17. The device as claimed in claim 10, wherein the compressor is a clutchable compressor, and wherein the first operating state corresponds to a clutched state of the compressor and the second operating state corresponds to a declutched state of the compressor.

18. The device as claimed in claim 10, wherein the bypass means comprise at least one control valve, of which the open position and the closed position is adjustable by a motor.