JPS63148042A - Air conditioner - Google Patents

Abstract

PURPOSE:To maintain a hot air environment determined by mainly blown off air temp. and air quantity (air flow velocity) at a constant comfortableness by a method wherein the operation mode of a constant blown off air temp. controlling the revolving speed of a compressor to bring the air temp. to a target value is made possible to be selected. CONSTITUTION:When a constant room temp. mode is selected by an operation mode set switch 33, an operation moves to a step 52 and then the operation moves to a step 53 after the target value A of room temp. sent out from a room temp. set switch 31 is introduced. At this point, the room temp. B is detected by the output signal from a room temp. thermister 10. When a constant charge air temp. mode is selected at a step 51, the operation moves to a step 55 after the target value A of charge air temp. sent out from a blown off air temp. set switch 32 is introduced at a step 54. At this point, the blown off air temp. B sent out from an air temp. thermister 13 is detected. In either mode, the target value and the detected value B are compared with each other and then the revolving speed of a compressor is controlled to keep the room temp. constant in case of the constant room temp. mode while the blown of air temp. is kept constant in case of the constant air temp. mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner that improves comfort, especially during heating.

[Conventional technology]

FIG. 6 shows a conventional air conditioner disclosed in, for example, Japanese Unexamined Patent Publication No. 61-130744. In the figure, 1 is a compressor, 2 is a four-way valve, and 3 is an outdoor heat exchanger. , 4
1 is an indoor heat exchanger, 5 is a pressure reducing device, 7 is a rotation speed variable device that changes the rotation speed of the compressor 1, 8 is an outdoor blower, 9 is an indoor blower, 10 is a room temperature thermistor that detects the room temperature, 11
12 is a temperature comparison means for the room temperature thermistor 10 and the setting device 11, and 15 is a control device for giving a command to the rotation speed variable device 7 based on the comparison result of the temperature comparison means 12.

In the air conditioner configured in this way, the rotation speed variable device 7 changes the rotation of the compressor 1 and changes the amount of heat released or absorbed in the indoor heat exchanger 4 so that the room temperature reaches the target set value. This controls the system to create a comfortable space inside the room.

[Problem that the invention seeks to solve]

Conventional air conditioners are configured as described above, and the rotation speed of the compressor is determined only by keeping the room temperature constant, and does not take into account the blowout temperature factor, so when heating starts and the room temperature is low. Sometimes, when you want to get warmth from hot air blowing out, or when the room is small and the airflow of hot air blowing out affects the user's environment, the blowing temperature will be low and you will feel cold air, which may be uncomfortable. There were cases where it happened. On the other hand, the blowout temperature may be controlled by the blowout air volume using an indoor blower, but even if the blowout temperature is kept constant, the blowout air speed changes and the airflow feeling changes, making it impossible to maintain a constant level of comfort. There were problems such as not having one.

This invention was made to solve the above-mentioned problems, and when the influence of hot air is strong or when you want to actively utilize it, it is possible to use an operation mode in which the outlet temperature is constant without changing the airflow. The purpose of the present invention is to provide an air conditioner that provides comfort in a warm air environment, provides a conventional operating mode with constant room temperature when the influence of hot air is small, and allows selection of both modes. It is something.

[Means for solving problems]

This invention provides a constant room temperature operation mode in which the rotation speed of the compressor is controlled so that the room temperature reaches a target value, and a constant discharge temperature operation mode in which the rotation speed of the compressor is controlled so that the air outlet temperature reaches a target value. is provided, allowing selection of both modes.

[Effect]

The air conditioner according to the present invention allows selection of an operation mode where the air outlet temperature is constant, in which the rotation speed of the compressor is controlled so that the air outlet temperature reaches a target value. It becomes possible to maintain the determined warm air environment at a certain level of comfort.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the control system of the air conditioner, in which 20 is a room temperature detecting means for detecting the indoor temperature, 21 is a blowing air temperature detecting means for detecting the temperature of the air blown out from the indoor blower, and 22 is a block diagram showing the control system of the air conditioner. Reference numeral 23 indicates a room temperature target temperature setting means for setting a target temperature of the room temperature, 23 indicates a blowout target temperature setting means for setting a target temperature for the outlet temperature, 24 indicates an operation mode selection means for selecting various operation modes to be described later, and 25 indicates a compressor. The rotation speed determining means determines the rotation speed of the compressor by taking in and calculating the output signals of the respective parts.

The determined rotational speed signal outputted from the compressor rotational speed determining means 25 is supplied to the rotational speed variable device 7, thereby controlling the rotation of the motor constituting the drive section of the compressor 1.

FIG. 2 is a schematic diagram showing the relationship between the refrigerant circuit and the control circuit, and refrigeration cycles 1 to 9 are the same as the conventional one. 10 is a room temperature thermistor as a room temperature detection means, and 13 is a discharge temperature thermistor as a discharge air temperature measurement means, both of which are connected to an input circuit 16 of a microcomputer 15. 14 includes a room temperature setting switch 31 as a means for setting a target temperature of the room temperature, an outlet temperature setting switch 32 as a means for setting a target temperature of the outlet temperature, and an operation mode setting switch 33 as an operation mode selection means. These switch output signals are input to the input circuit 1 of the microcomputer 15.
6. The microcomputer 15 includes an input circuit 16, a CPU 17, an output circuit 18, and a memory 19, and has a compressor rotation speed determining function. From the first day of this output circuit, the rotation speed command determined by the compressor rotation speed determination function is transmitted to the rotation speed variable device 7.
The rotation speed of the compressor 1 is varied by being supplied to the compressor 1.

FIG. 3 is a detailed view of the operating section 14 shown in FIG. 2, and the temperature setting and operation mode can be set according to the user's preference.

Next, the operation of the above embodiment will be explained.

Note that since the present invention is highly effective in improving comfort during heating, the operation during heating will be mainly described.

First, the user uses the operation mode setting switch 33 of the operating section 14 to select whether he wants to perform heating with a constant room temperature or a constant blowout temperature, depending on the load thermal sensation of the room. Here, when the constant room temperature mode is selected, the target temperature of the room temperature is set using the room temperature setting switch 31. Further, when the constant blowing temperature mode is selected, the blowing temperature setting switch 32 is used to set the target temperature of the blowing temperature. As a result, the user's intention is conveyed to the microcomputer 15. Further, the current room temperature is supplied to the microcomputer 15 from the room temperature thermistor 10 as a room temperature signal, and the current hot air blowing temperature is supplied from the blowing temperature thermistor 13 as a blowing temperature signal. In response to these input signals, a compressor rotation speed determining means 25 configured with a microcomputer determines the rotation speed at which the compressor 1 should operate.

On the other hand, the memory 19 stores a control program including a program for determining the compressor rotation speed.
This is illustrated in a flowchart as shown in FIG. The operation of the air conditioner will be explained below using this flowchart.

First, in step 51, an operation mode is selected from the output state of the operation mode setting switch 33. Here, when the constant room temperature mode is selected by the operation mode setting switch 33, the process moves to step 52. In step 52, the target value A of the room temperature output from the room temperature setting switch 31 is taken in, and the process proceeds to step 53. In step 53, the room temperature B is detected from the output signal of the room temperature thermistor 10.

Further, when the constant blowing temperature mode is selected in step 51, the process moves to step 54. In step 54, the target value A of the outlet temperature outputted from the outlet temperature setting switch 32 is taken in, and the process proceeds to step 55. In step 55, the outlet temperature thermistor 13
Detects the blowout temperature B output from the In either of the above operating modes, the target value A and the detected value B are compared in step 56. If A and B are equal, the process returns to step 51 and the rotation speed of the compressor is not changed. If the determination in step 56 is NO, the process proceeds to step 57 and the magnitude relationship between A and B is determined. Here, if A>B, the judgment in step 57 is YES,
By proceeding to step 58, the compressor l
Increase the rotation speed. Further, if A<B, the determination in step 57 is NO, and the process moves to step 58, thereby decreasing the rotation speed of the compressor 1. By repeating such processing, the rotation speed of the compressor is determined so that A=B.

The determined compressor rotational speed is supplied to the rotational speed variable device 7, where the compressor is operated at the rotational speed previously determined. That is, when the current room temperature is lower than the target room temperature, the heating capacity is increased, and similarly, when the current outlet temperature is lower than the target outlet temperature, the heating capacity is also increased.

Here, if the capacity is increased with the same air volume, the blowout temperature will increase almost proportionally.

In this way, the room temperature is kept constant in the constant room temperature mode, and the outlet temperature is kept constant in the constant outlet temperature mode.

In the above embodiment, setting switches are used as means for setting the target temperature of the room temperature and the target temperature of the hot water temperature, but the present invention is not limited to this. As a setting means, as shown in FIG. 5, only an operation switch 34 that indicates a thermal sensation such as "when it's hot" or "when it's cold" may be used. in this case,"
The driving mode when the key is pressed manually in hot weather is
If the room temperature is constant mode, the target value of the room temperature is lowered, and if the outlet temperature is constant mode, the target value of the outlet temperature is lowered. In this way, it becomes possible to change the target room temperature and outlet temperature according to the user's preference with only one operation switch, and the operation becomes easy.

〔Effect of the invention〕

As described above, according to the present invention, by adding user-selectable compressor rotation speed determination means that maintains a constant discharge temperature to the conventional compressor rotation speed determination means that maintains a constant room temperature, heating start-up Even when the room is small and the user wants to feel comfortable by being exposed to warm air, it is possible to obtain a comfortable warm air environment in which the blowing temperature and wind speed are constant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control system of an air conditioner according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a refrigerant circuit and a control circuit of an air conditioner according to an embodiment of the present invention, and FIG. FIG. 2 is a detailed diagram of the operating section, FIG. 4 is a flowchart for explaining the operation of the compressor rotation speed determining means, FIG. 5 is a detailed diagram of the operating section showing another embodiment, and FIG. 6 is a detailed diagram of the operating section shown in FIG. FIG. 2 is a configuration diagram of a refrigerant circuit and a control circuit in a conventional air conditioner. 1 is a compressor, 2 is a four-way valve, 3 is an indoor heat exchanger, 4 is an outdoor heat exchanger, 5 is a pressure reduction device, 7 is a rotation speed variable device, 8 is an outdoor blower, 9 is an indoor blower, 10 is a room temperature thermistor ,1
3 is a blowout temperature thermistor, 14 is an operation unit, 15 is a microcomputer, 16 is an input circuit, 17 is a CPU, 1B is an output circuit, 19 is a memory, 20 is a room temperature detection means, 21 is a blowout air temperature detection means, and 22 is a room temperature target temperature setting means;
23 is a blowout target temperature setting means, 24 is an operation mode selection means, 25 is a compressor rotation speed determining means, 31 is a room temperature setting switch, 32 is a blowout temperature setting switch, and 33 is an operation mode setting switch. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Representative Masuo Oiwa (2 others) Fig. 2 15゜10...Room temperature thermistor 13...Blowout temperature thermistor 14...Operation section Fig. 3 Fig. 4 Fig. 5

Claims (3)

[Claims] (1) In an air conditioner equipped with an indoor/outdoor heat exchanger, a pressure reducing device, a compressor, an indoor/outdoor blower, and a variable rotation speed device for the compressor, a means for detecting room temperature and a means for setting a target temperature of the room temperature. , means for detecting the temperature of the blown air, means for setting the target temperature of the blown air temperature, a constant room temperature operation mode for controlling the rotation speed of the compressor so that the room temperature becomes the target value, and the blown air temperature becomes the target value. 1. An air conditioner comprising: a compressor rotation speed determining means having a constant discharge temperature operation mode for controlling the rotation speed of the compressor; and an operation mode selection means for selecting between the two operation modes. (2) The air conditioner according to claim 1, wherein the operation mode selection means is an operation mode selection switch selectable by the user. (3) The means for setting the target temperature of the room temperature and the means for setting the target value of the air outlet temperature are "when it is hot" and "when it is cold".
2. The air conditioner according to claim 1, wherein the air conditioner is an operation switch that displays a thermal sensation such as.