JPH01136866A - Control method for temperature and humidity of air conditioner of vehicle - Google Patents

Abstract

PURPOSE:To improve service to passengers by setting a target set temperature, setting a target set humidity in line with a temperature below the target set temperature, and carrying out a dehumidifying operation so as to make the humidity inside a vehicle the target set humidity when the temperature inside the vehicle is below the target set temperature. CONSTITUTION:A controller 8 detects the temperature and humidity of an air conditioning space by means of a temperature sensor 10 and a humidity sensor 12 while receiving a target set temperature from a temperature setter 9. When the temperature in the air conditioning space (inside a vehicle) is above the target set temperature, a cooling operation is carried out. Also, when the temperature inside the vehicle is below the target set temperature, the detected result of the temperature inside the vehicle is judged and carries out a dehumidifying operation so as to obtain the target set humidity which is set in line with the temperature. Thereby, always comfortable humidity can be obtained regardless of temperature change inside the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling the temperature and humidity of a vehicle air 11i1Mit. It is about the method.

[Conventional technology]

Conventionally, temperature and humidity control methods in air conditioners have prioritized controlling the temperature of the space where air conditioning is performed. In other words, humidity control is performed only when the temperature of the air-conditioned space is within a certain target setting range, and
When lff is lower than the set temperature, the humidity control operation is not performed. In addition, if the concentration exceeds the set concentration, cooling operation will be performed to lower the temperature of the space, and
Along with this, dehumidification must also be carried out.

As such a control method, gAI, for example,
-23455 publication etc. are mentioned.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, when the temperature of the air-conditioned space falls below the target setting temperature, dehumidification is not performed even if the humidity is high, which may cause discomfort, especially during the rainy season. . Incidentally, the above-mentioned discomfort is more common in commuter vehicles, etc., which have a high occupancy rate, and it cannot be said that sufficient consideration has been given to improving the service to passengers.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling temperature and humidity of a vehicle air conditioner, which can perform fA degree control even when the attitude is below a target setting in an air-conditioned space, that is, inside a vehicle, and can improve service to each passenger.

[Means for solving problems]

The above purpose is to set a target set temperature inside the car, set a target set concentration corresponding to the temperature below the target set concentration, detect the inside humidity and the humidity inside the car, and when the inside temperature is above the target set hot water temperature, This is achieved by performing a cooling operation and performing a dehumidifying operation so that the humidity inside the vehicle reaches the target set temperature when the temperature inside the vehicle is below the M target set point temperature.

[For production]

When the temperature of the air-conditioned space falls below the target setting concentration, the humidity detection result of the space is determined and the dehumidification operation is performed so that the humidity reaches the target humidity set corresponding to the temperature. It is possible to always control the humidity to a comfortable level regardless of temperature changes in the air-conditioned space.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the figure, 2 is an air conditioner main body, which is usually installed on the roof or under the floor of a vehicle. 3 is a compressor, 4 is an outdoor heat exchanger, 5 is an outdoor fan, 6 is an indoor heat exchanger, and 7 is an indoor fan, and each of these devices is housed in the air conditioner main body 1. Reference numeral 8 denotes a controller consisting of a microcomputer, which is a control means for controlling the compressor 3 and the indoor fan 7. Reference numeral 9 denotes a temperature setting device that sets a target temperature inside the vehicle and outputs it as a control input to the control R8. A temperature sensor 10 detects the temperature inside the vehicle and outputs it to the controller 8 as a control input, and a humidity sensor 10 detects the humidity inside the vehicle and outputs it to the sub-assembly controller 8 as a control input. Reference numeral 13 denotes an input device constituting the controller 8, and is an input device for converting control inputs from the temperature setting f19, the temperature sensor IO, and the humidity sensor 10 and guiding them into the microcomputer. A fixed storage device (hereinafter simply referred to as ROM) 14 stores programs created in advance. The device is a storage device for constant speed access (hereinafter simply referred to as RAM), which temporarily stores data such as control inputs from the various detection means. 16 is a central processing unit W1 (hereinafter referred to as CPU) which calculates the control input based on the program and outputs a control command. 17 is an output device for converting the control command from the CPU 16 and outputting it to the controlled device.

In the air conditioner, the high-intensity, high-pressure gas refrigerant discharged from the compressor 3 exchanges heat with outside air in the outdoor heat exchanger 4, is cooled and condensed, becomes liquid refrigerant, and is transferred to a pressure reducing mechanism (for example, a capillary It is guided to a tube or an expansion valve 1 (not shown), where it becomes a two-phase gas-liquid fluid and is sent to the indoor heat exchanger 6.

Then, the refrigerant exchanges heat with the air supplied into the vehicle in the indoor heat exchanger 6, and returns to the compression unit 113. The air undergoes heat exchange in the indoor heat exchanger 6 to become conditioned air, which is supplied into the vehicle by an indoor fan 7.

Next, the control contents will be explained with reference to the flowchart in FIG. 2 and the graph showing the temperature and temperature setting range in FIG. First, the temperature inside the vehicle is detected by the temperature sensor 10, and the detection result T is set as the target set temperature To, that is, this value is set with a width of ±1'C, and the determination is made with the lower limit T1. Do it at 18 a. If the relationship holds that the vehicle interior temperature T>set value T, then a command to turn on the cooling operation of the air conditioner is outputted unconditionally. On the other hand, if the salinity inside the vehicle is in the relationship T≦set value T1, proceed to the next step.

Step 18 Moves to b, where the temperature inside the car is T, ≧T.
It is determined whether or not there is a relationship of ≧T2 (however, TI > T2), and if the above condition is met, step 18
Move to c. In step 18c, a determination is made between the current detection result R of the vehicle interior humidity and the target humidity R1. Then, when the vehicle interior humidity R≧set humidity R1, a control command to operate the air conditioner in the dehumidification operation B operation mode is output. On the other hand, if the relationship R1e vehicle interior humidity R≧setting humidity R1 is not established, a control command to operate the empty 1111g device in forward mode D is output. That is,
When the humidity inside the vehicle is lower than the set humidity R, the interior of the vehicle is in a comfortable condition and dehumidification is not required. Furthermore, the set humidity R1 is set as the upper limit of the humidity at which the vehicle feels most comfortable when the temperature inside the vehicle is between T2 and T1.

Next, in step 18b of l'ff, the vehicle interior temperature T is T,
If T is not ≧T≧T2, that is, if T
It is determined whether the relationship is ≧T3. If the temperature inside the car is T2, the process moves to step 18f, where the current humidity R in the car and the set humidity R2 are determined.
If the humidity R in the vehicle is in the relationship R≧R2, a control command to operate the air conditioner in the dehumidifying operation mode C is output.

Note that the correction set point temperature T3 is a temperature lower than the M note T2, and the set humidity R2 is set to a value that corresponds to the set hot water temperature T3 and is comfortable under that temperature condition.

Moreover, the value of @set humidity R1 is set higher than that of set humidity R2. Furthermore, dehumidification operation A is continuous operation,
It has a relatively high dehumidification capacity (on the other hand).

Dehumidification operation C is an operation state in which the dehumidification capacity is reduced due to intermittent operation.

If the vehicle interior temperature T and vehicle interior humidity R do not meet the conditions in step 18e and step 18f, a control command to operate in the ventilation mode is output to the air conditioner as in step 18c.

According to such control, even if the temperature inside the car reaches a set temperature or lower, the humidity is maintained at a comfortable level corresponding to the temperature inside the car, thereby improving service to passengers. Moreover, since the target humidity is set in inverse proportion to the temperature inside the vehicle for temperatures below the set temperature, drying at low temperatures can be prevented.

〔Effect of the invention〕

As explained above, according to the present invention, the humidity inside the car can be maintained in a comfortable state even if the temperature is below the target setting temperature, so that the service for each passenger can be improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an air conditioner that performs the temperature and humidity control method according to the present invention, Fig. 2 is a flowchart showing an embodiment of the temperature and humidity control method according to the present invention, and Fig. 3 is an operation according to the relationship between temperature and humidity. It is a graph showing modes. 2...Air conditioner, 8...Controller, 10
...Quantity temperature sensor, 12... Humidity sensor agent Patent attorney Masaru Ogawa Male

Claims (2)

[Claims] 1. Setting a target temperature inside the vehicle, setting a target humidity corresponding to a temperature below the target temperature, detecting the temperature and humidity inside the vehicle, and performing cooling operation when the temperature inside the vehicle is equal to or higher than the target temperature. A method for controlling temperature and humidity of a vehicle air conditioner, characterized in that a dehumidifying operation is performed so that the humidity inside the vehicle reaches the target humidity when the temperature inside the vehicle is below the target temperature. 2. A temperature and humidity control method for a vehicle air conditioner according to claim 1, wherein the target humidity is set to a value that is inversely proportional to a decrease in vehicle interior temperature.