JPH07229645A - Air conditioner - Google Patents

Abstract

PURPOSE:To automatically check connection of a signal line or a refrigerant tube in an apparatus by deciding change of temperature data input by an outdoor unit controller for controlling a refrigerant output unit, and outputting a switching signal for switching an input switching unit. CONSTITUTION:An input switching unit 14 switches inputs from input units A12, 13B which receive temperature data and operating data from outdoor units A1, B6 by a switching signal, and outputs it to a predetermined terminal. An outdoor controller 15 controls refrigerant output units A19, B21 designated by the input operating data. The controller 15 inputs operating data of the unit A1 via the units A12, and 14, compares, when the temperature of the unit 14 is not changed, temperature data read from a memory 17 with newly input temperature data, decides, if a room temperature is not changed, an erroneous connection, inputs the switching signal to the unit 14, and switches it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having one outdoor unit and a plurality of indoor units.

[0002]

2. Description of the Related Art In a conventional air conditioner having one outdoor unit and a plurality of indoor units, a marking is put on a signal line connecting the indoor unit and the outdoor unit or a refrigerant connection pipe. By making a distinction, incorrect connections can be prevented from occurring during installation, and if the connection is incorrect, the connection error can be displayed on the display provided on the outdoor unit so that the connection can be made correctly. It was

[0003]

Accordingly, since it is easy to confirm whether the correct connection is made because the connection abnormality is displayed, there is a problem that the connection work needs to be redone. INDUSTRIAL APPLICABILITY The present invention automatically checks the connection of a signal line or a refrigerant pipe inside a device and makes it possible to make a correct connection state, so that the installation work can be prevented from being redone. The purpose is to provide a harmony machine.

[0004]

An air conditioner according to a first aspect of the present invention is a heat exchanger, and a first air conditioner for detecting the temperature of the heat exchanger.
Temperature detecting means, a second temperature detecting means for detecting room temperature, and an indoor unit control section for transmitting the temperature data detected by the first and second temperature detecting means and the input operation data to the outdoor unit. Consisting of a plurality of indoor units in which the heat exchanger is connected to the refrigerant output unit of the outdoor unit by piping, a plurality of input units for receiving temperature data and operation data from each indoor unit, and each of the input units. The input switching section that switches the input of the control signal by the switching signal and outputs it to a predetermined terminal, the temperature data input from the input switching section is stored in the storage section, and the refrigerant output section specified by the input operation data is output. An outdoor unit control unit for controlling the outdoor unit control unit, which determines a change in temperature data input by the outdoor unit control unit and outputs a switching signal for switching the input switching unit.

In the air conditioner of the second invention of the present application, a timer unit is provided in the outdoor unit control unit, and the temperature data read from the storage unit after a lapse of a predetermined time and the new data are provided by a signal input from the timer unit. It is characterized in that the outdoor unit control section judges the temperature change by comparing with the temperature data input to. The air conditioner of the third invention of the present application,
The outdoor unit control unit is provided with a display unit, the outdoor unit control unit detects temperature data and operation data input from the indoor unit, and if there is an abnormality in the input, a signal is input to the display unit to cause an abnormality. Is displayed. An air conditioner of a fourth invention of the present application is characterized in that the input switching unit, the storage unit, the timer unit, and the outdoor unit control unit are provided inside a microcomputer.

[0006]

In the air conditioner of the first invention of the present application, the temperature data input from the input switching unit is controlled by controlling the refrigerant output unit designated by the operation data input by the outdoor unit control unit to circulate the refrigerant. Is stored in the storage unit, the change in the temperature data is determined by the outdoor unit control unit by comparing with the temperature data that is continuously input, and if the input temperature data does not change, a switching signal is sent from the outdoor unit control unit. Since the refrigerant pipe and the data signal line can be associated with each other by inputting and switching to the input switching unit, a correct connection state can be achieved. In the air conditioner of the second invention of the present application, the outdoor unit control unit is provided with a timer unit, and the temperature data read from the storage unit by the outdoor unit control unit by a signal input from the timer unit. Since it is possible to determine the temperature change by comparing with the temperature data newly input after a lapse of a predetermined time, it is possible to accurately determine the temperature change.

In the air conditioner of the third invention of the present application,
The outdoor unit control unit is provided with a display unit, and the outdoor unit control unit detects temperature data and operation data input from the indoor unit, and if there is an abnormality in the input, displays an input abnormality on the display unit. It becomes possible to do. In the air conditioner of the fourth invention of the present application, the input switching unit, the storage unit, the timer unit, and the outdoor unit control unit are provided inside the microcomputer, so that the structure is simple, and therefore, it is easy. It is possible to assemble it.

[0008]

1 is a block diagram showing an embodiment of an air conditioner of the present invention. The indoor unit A1 includes a heat exchanger 4 and
A temperature sensor 3 configured by, for example, a thermistor, which detects the temperature of the heat exchanger 4, a temperature sensor 2 configured by a thermistor, which detects a room temperature, and temperature data detected by the temperature sensors 2 and 3. The control unit 5 transmits the operation data input using a remote controller or the like to the outdoor unit 11, and the heat exchanger 4 is connected to the refrigerant output unit A19 of the outdoor unit 11 by piping. Similarly, the indoor unit B6 also has a heat exchanger 9
And a temperature sensor 8 configured to detect the temperature of the heat exchanger 9, such as a thermistor, a temperature sensor 7 configured to include a thermistor to detect room temperature, and temperatures detected by the temperature sensors 7 and 8. A control unit 10 that transmits data and operation data input using a remote controller or the like to the outdoor unit 11.
And the heat exchanger 9 is connected to the refrigerant output portion B2 of the outdoor unit 11.
It is connected to 1 by piping. Although an example in which two indoor units A1 and B6 are connected to the outdoor unit 11 is shown for the sake of clarity, the number of indoor units to be connected may be increased to three or more.

The outdoor unit 11 includes an indoor unit A1 and an indoor unit B6.
Input unit A1 for receiving temperature data and operation data from the vehicle
2 and the input unit B13, the input unit A12 and the input unit B13
Input switching section 14 for switching the input from the input terminal to a predetermined terminal and outputting it to a predetermined terminal, and the temperature data input from the input switching section 14 are stored in the storage section 17 and designated by the input operation data. The outdoor unit control unit 15 controls the refrigerant output unit A19 and the refrigerant output unit B21. Further, the control unit 15 controls the refrigeration circuit unit 20 to output the refrigerant from the refrigeration circuit unit 20 via the output unit A19 and the output unit B21, and the indoor unit A1 and the indoor unit B6.
It is circulated to the heat exchangers 4 and 9 of FIG. 2 to perform cooling or heating, and a timer 16 is connected to the control unit 15 so that the timer 16 manages the time and the display unit 18 receives a signal. Is input so that a predetermined display can be made on the display unit 18. Input switching unit 14 and storage unit 1
7 and the timer 16 and the control unit 15 may be provided inside the microcomputer. With this structure, the structure is simple, so that it is possible to easily assemble.

FIG. 2 is a block diagram showing an embodiment of the input switching section 14 of FIG. 1, and shows an example in which three indoor units are used. Switchers 25, 26 and 27 having three input terminals and one output terminal and one input terminal for switching signals are provided, and each input from the indoor unit, input A, input B and input C are branched into three. Input to the input terminals of the switching devices 25, 26 and 27, and the outputs A, B and C from the switching devices 25, 26 and 27 are input to the control unit 15, respectively. The control unit 15 controls the output unit A19 with the output A, selects the input terminal capable of detecting the change of the temperature data by the switching signal, and outputs the output unit B21.
Is controlled to select an input terminal capable of detecting a change in temperature data by a switching signal, and the switch 27 selects and sets an input terminal other than the above. If the number of indoor units and the number of input terminals of the switching unit and the switching unit are made the same, the input switching unit 14 is switched in the same manner even when the number of indoor units is increased, and the input unit of the outdoor unit 11 is switched. It is possible to connect the output units in association with each other.

FIG. 3 is a flow chart showing the switching procedure of the input switching unit 14 of FIG. First, step S1
In the indoor unit, for example, the control unit 5 of the indoor unit A1, an operation signal is input to start the operation, and the control unit 15 controls the input unit A1.
2 and the operation data of the indoor unit A1 via the input switching unit 14, and determines whether there is data input in step S2. If there is no data input, the process proceeds to step S3, and the control unit 15 displays a signal on the display unit. 18 is input and an abnormal output is displayed on the display unit 18, and the process ends. If data is input in step S2, the process proceeds to step S4, and the room temperature data detected by the room temperature sensor 2 input through the input unit A12 and the input switching unit 14 in step S4 and the temperature sensor 3 are input.
The storage unit 17 stores the temperature data of the heat exchanger 4 detected in.

In step S5, the timer 16 is started, the refrigeration circuit section 20 and the output section A19 are controlled to circulate the refrigerant through the heat exchanger 4, the process proceeds to step S6, and preset by the input from the timer 16. It is determined whether the predetermined time has passed, and if the predetermined time has not passed, the process waits, and if the predetermined time has passed, the process proceeds to step S7, and the temperature data read from the storage unit 17 is newly input. The temperature data is compared to determine whether the temperature of the heat exchanger 4 has changed. If the temperature has changed, the connection is normal and the process ends. If the temperature of the heat exchanger 4 has not changed, the process proceeds to step S8 and the temperature data read from the storage unit 17 is compared with the newly input temperature data to determine whether the room temperature has changed. If it has changed, it is considered that the temperature change of the heat exchanger 4 has not sufficiently appeared due to environmental conditions, the process returns to step S7, and the procedure from step S7 is repeated.

If the room temperature has not changed, it is determined that the incorrect connection is made, and the process proceeds to step S9 to input a switching signal to the input switching unit 14 to switch. For example, in FIG.
In, it is assumed that the signal line from the control unit 10 of the indoor unit B6 is connected to the input unit A12, the signal line from the control unit 5 of the indoor unit A1 is connected to the input unit B13, and the indoor unit A1 is in the operating state. . Since the operation signal is input from the input unit B13, the control unit 15 controls the output unit B21 to circulate the refrigerant,
In order to send the refrigerant to the heat exchanger 9 of the indoor unit B6, the input unit B1
Naturally, the temperature data input via 3 does not change. Therefore, incorrect connection is found. The control unit 15 inputs the switching signal to the input switching unit 14, associates the output unit B21 with the input unit A12, and outputs the output unit A19 with respect to the input unit B13.
By making them correspond to each other, a correct connection state can be established. Therefore, since the input switching unit 14 is switched, the control unit 15 controls the output unit A19 to circulate the refrigerant and sends the refrigerant to the heat exchanger 4 of the indoor unit A1. Further, even when the pipes from the output unit A19 and the output unit B21 are mistaken, the same detection can be performed.

In step S10, the temperature sensor 3 receives the data from the control unit 5 connected to the input unit B13.
The temperature data of the heat exchanger 4 detected in step S11 is fetched, and the process proceeds to step S11 to determine whether the temperature data of the heat exchanger 4 has changed. The comparison of the temperature data in step S11 may be made by comparing with the temperature data after the lapse of a predetermined period, as in the procedure of steps S5 to S7. Part 17
It may be compared with the temperature data stored in. If the temperature data of the heat exchanger 4 changes in step S11, it ends because it is in the correctly connected state, and if there is no change in the temperature data, it is considered that a malfunction has occurred, and the display unit 18 has an abnormality. Display output and exit.

In the above embodiment, the case where the number of indoor units is two has been described, but when the number of indoor units is large, for example,
The connection state of the input switching unit 14 may be initialized to connect. 1, a plurality of refrigerant pipes from the outdoor unit 11 and data signal lines from each indoor unit are arbitrarily connected, an initialization signal is input to the control unit 15, and the control unit 15 sequentially outputs. A control signal is input to the section A19, the output section B21, the output section C (not shown), and the refrigerant is circulated. The control unit 15 inputs the switching signal to the input switching unit 14, and
The input terminal is sequentially switched as shown in, and the output section A
Select the input terminal that causes the temperature data to change when 19 is in the output state, identify the input section corresponding to the output section A19, and then select the input terminal that causes the temperature data to change when the output section B21 is in the output state. Select, specify the input section corresponding to the output section B21, and further select the input terminal that causes a change in the temperature data when the output section C is in the output state,
The input section corresponding to the output section C may be specified, the connection state may be initialized, and the connection may be performed.

[0016]

As described above, according to the present invention,
Since the input switching section is provided in the outdoor unit control section, the connection of signal lines or refrigerant pipes can be automatically checked inside the outdoor unit and the correct connection state can be established, eliminating the need for re-installation work. It is possible to provide an air conditioner capable of

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an air conditioner of the present invention.

FIG. 2 is a configuration diagram showing an embodiment of an input switching unit of FIG.

FIG. 3 is a flowchart showing a switching procedure of an input switching unit in FIG.

[Explanation of symbols]

 1 Indoor unit A 2 Room temperature sensor 3 Temperature sensor 4 Heat exchanger 5 Control part 6 Indoor unit B 7 Room temperature sensor 8 Temperature sensor 9 Heat exchanger 10 Control part 11 Outdoor unit 12 Input part A 13 Input part B 14 Input switching part 15 Control unit 16 Timer 17 Storage unit 18 Display unit 19 Output unit A 20 Refrigeration circuit unit 21 Output unit B 25 Switcher 26 Switcher 27 Switcher

Claims (4)

[Claims] 1. A heat exchanger, a first temperature detecting means for detecting a temperature of the heat exchanger, a second temperature detecting means for detecting a room temperature, and a first and a second temperature detecting means. It consists of an indoor unit control unit that transmits the detected temperature data and the input operation data to the outdoor unit, and a plurality of indoor units in which the heat exchanger is connected to the refrigerant output unit of the outdoor unit by piping and from each indoor unit. Temperature data and operating data, a plurality of input sections, an input switching section that switches each input from the input section by a switching signal and outputs to a predetermined terminal, and temperature data input from the input switching section. And an outdoor unit control unit that controls the refrigerant output unit specified by the input operation data, and determines the change in the temperature data input by the outdoor unit control unit. Switching signal for switching the switching unit An air conditioner characterized by outputting. 2. A timer section is provided in the outdoor unit control section,
The outdoor unit control unit determines a temperature change by comparing the temperature data read from the storage unit after a lapse of a predetermined time with the temperature data newly input by a signal input from the timer unit. The air conditioner according to claim 1. 3. The outdoor unit control unit is provided with a display unit, the outdoor unit control unit detects temperature data and operation data input from the indoor unit, and if there is an abnormality in the input, a signal is sent to the display unit. The air conditioner according to claim 1 or 2, wherein the abnormality is displayed by inputting. 4. The air conditioner according to claim 1, wherein the input switching unit, the storage unit, the timer unit, and the outdoor unit control unit are provided inside a microcomputer.