WO2010137124A1

WO2010137124A1 - Indoor unit and air conditioner

Info

Publication number: WO2010137124A1
Application number: PCT/JP2009/059646
Authority: WO
Inventors: 俊成山田
Original assignee: 三菱電機株式会社
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-12-02

Abstract

An indoor unit (200) controlled in a manner operatively associated with an auxiliary heater (210, 212, or 216) connected by control wiring (213 or 217). The indoor unit is provided with a setting means such as a DIP switch (219) into which setting is inputted, and also with an indoor control device (206) for controlling, based on the setting performed by the setting means, the auxiliary heater (210, 212, or 216) by a control pattern selected from among predetermined control patterns.

Description

Indoor unit and air conditioner

The present invention relates to an indoor unit of an air conditioner. In particular, the present invention relates to the control of an auxiliary heater used attached to an indoor unit.

For example, there is an air conditioner equipped with an auxiliary heater to assist air heating during heating (for example, see Patent Document 1). The purpose of the auxiliary heater in this air conditioner is to reduce the number of times the compressor stops during the cooling operation and to prevent the heating capacity from being lowered. As the means, heater output (ON-OFF and output control) based on the sensor means for detecting the piping temperature of the heat exchanger of the indoor unit based on the output result of the means for controlling the output of the auxiliary heater and the means for detecting the output. ), The overall current limit value, and the operation speed of the blower motor are controlled.

JP-A-8-128705

Controlling the auxiliary heater such as the air conditioner described above is effective in terms of providing a comfortable living environment. However, the above control is premised on an air conditioner having an auxiliary heater in the blower circuit of the indoor unit serving as a blower path. For example, there are many cases in the world where auxiliary heaters are installed locally. At this time, there are types of auxiliary heater installation settings such as panel heater setting (referred to as a setting for installing a heater in a living space) and duct heater setting (referred to as a setting for installing a heater in a ceiling duct). . For this reason, the installation type of the auxiliary heater is determined locally, but the above-described air conditioner control device cannot perform control in consideration of the installation type of the heater.

In addition, in the conventional indoor unit, even when an auxiliary heater is installed locally, in order to realize appropriate control, it is necessary to change the board or wiring of the indoor unit or to provide a complicated relay circuit. There was an economic burden.

Furthermore, there may be a case where it is difficult to fully understand the effects on the indoor units due to modification of the local control circuit, which may cause difficulties when dealing with services.

From the above, it is an object of the present invention to provide an air conditioner that can be set to perform control suitable for an auxiliary heater installed on site.

The indoor unit according to the present invention includes a setting unit that performs settings related to the control of the auxiliary heater in the indoor unit that controls the auxiliary heater connected by wiring, and a predetermined control based on the setting performed in the setting unit. And a control device that controls the auxiliary heater according to a control pattern selected from the patterns.

According to the present invention, since the control device has the setting means and the control device controls the auxiliary heater based on the setting made to the setting means, in order to cope with the installation environment of the auxiliary heater in the field. In addition, it is possible to provide a control pattern according to the installation type of the indoor unit without making preparations such as changing the board or wiring in the indoor unit or providing a complicated relay circuit. In addition, for example, indoor unit manufacturers have little room to know in detail for end users who sell indoor units, and it is possible to supply indoor units that can flexibly respond to local heater installation conditions. Effective in terms.

1 is a configuration diagram of an air conditioner according to Embodiment 1. FIG. It is a block diagram centering on the indoor unit 200A of a ceiling embedded installation type. It is a block diagram centering on the indoor unit 200B of a ceiling cassette installation type. It is a figure showing the outline of the room inner side control apparatus. It is a figure which concerns on the setting of DIP switch 219, and control of auxiliary heater 210 grade | etc.,. It is a figure explaining control of the outdoor unit 100, the auxiliary heater 210, etc. FIG. It is a figure which shows the example of a pattern of control of auxiliary heater 210 grade | etc.,. It is a block diagram centering on the indoor unit 200A in Embodiment 2. FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of an air conditioner that is a refrigeration cycle apparatus according to Embodiment 1 for carrying out the present invention. The air conditioner of FIG. 1 includes an outdoor unit (outdoor unit) 100 and an indoor unit (indoor unit) 200, and each unit is connected by a refrigerant pipe to constitute a refrigerant circuit to circulate the refrigerant.

The compressor 101 includes an inverter circuit, a compressor motor, and the like. The rotation speed of the compressor motor (operating frequency of the compressor 101) is controlled by the inverter circuit to compress the refrigerant used in the refrigeration cycle and circulate in the refrigerant pipe. In addition, the four-way valve 102 switches the refrigerant flow between the cooling operation and the heating operation based on an instruction from the outdoor control device 111. The heat source side heat exchanger 103 performs heat exchange between the refrigerant and air (outdoor air). For example, it functions as an evaporator during heating operation, evaporating and evaporating the refrigerant. Moreover, it functions as a condenser during the cooling operation, and condenses and liquefies the refrigerant. The outdoor side control device 111 is composed of, for example, a microcomputer. It is possible to perform wired or wireless communication with the indoor control device 206. For example, the operation control of each unit of the outdoor unit 100 is performed based on data related to detection by various detection units (sensors) in the air conditioner.

FIG. 2 is a diagram showing a configuration when using an auxiliary heater centering on a general ceiling-embedded indoor unit (Duct unit) 200A. The indoor unit 200A of the present embodiment includes a motor 201, a blower 202, an indoor heat exchanger 203, an air filter 204, a drain pan 205, an indoor side control device 206, a blowout port portion 207, a suction port portion 208, and a throttle device (expansion valve). ) 230 (described in FIG. 1). When the motor 201 is driven, the fan of the blower 202 rotates, and the air sucked through the air filter 204 provided in the suction port 208 is sent to the indoor heat exchanger 203. The indoor heat exchanger 203 heats or cools the air from the blower 202 by heat exchange with the refrigerant that has passed through the piping and has been adjusted by the expansion device 220. Air related to heating or cooling is sent out from the outlet 207, passes through the outlet duct 209, and heats or cools the living space 211. The indoor control device 206 controls each device of the indoor unit 200A such as the blower 202. In the present embodiment, the operation control of the

auxiliary heaters

210 and 212 is also performed.

The auxiliary heater 210 of the duct heater setting is installed in the blowout duct 209. Moreover, the auxiliary heater 212 of panel heater setting is installed in the living space 211. In FIG. 2, both the

auxiliary heaters

210 and 212 are shown, but either one may be used. The control wiring 213 is a line for transmitting a signal for controlling the

auxiliary heaters

210 and 212 from the indoor control device 206.

FIG. 3 is a diagram illustrating a configuration when using an auxiliary heater centering on an indoor unit (non-duct unit) 200B of the ceiling cassette type air conditioner according to the first embodiment. The indoor unit 200B has the same basic configuration as the indoor unit 200A, although the positions of the inlet port 208 and the outlet port 207 are different. In FIG. 3, since there is no blowout duct 209 and duct heater setting cannot be performed, the setting of the auxiliary heater 216 is only panel heater setting and can be installed in the living space 215. The control wiring 217 is a line for transmitting a signal for controlling the auxiliary heater 216 from the indoor control device 206.

FIG. 4 is a diagram showing an outline of the indoor control device 206. The indoor side control device 206 is configured by a microcomputer (not shown) or the like, similar to the outdoor side control device 111. As shown in FIG. 4A, a DIP switch 219 that is a setting unit for performing interlock control with the

auxiliary heater

210, 212, or 216 is provided on a substrate 218 on which a microcomputer is mounted. Here, in the present embodiment, setting of whether the indoor unit is a ceiling-embedded indoor unit or a ceiling cassette type indoor unit by setting a DIP switch 219 provided on the substrate 218, another DIP switch (not shown), or the like. Can also be done. Further, as shown in FIG. 4B, it is assumed that the indoor side control device 206 uses a short-circuit connector 220 for determining the panel heater setting or the duct heater setting. The indoor-side control device 206 determines that the panel heater is set when the short-circuit connector 220 is inserted into the board 218, and determines that the duct heater is set when the short-circuit connector 220 is not inserted. The control settings performed by the indoor side control device 206 of the present embodiment are, for example, settings (operation state control) of a DIP switch (not shown) provided in the outdoor side control device 111 of the outdoor unit 100, and on the indoor side control device 206. The DIP switch 219 (auxiliary heater control) is set in combination with the presence / absence of connection of the short-circuit connector 220.

FIG. 5 is a schematic diagram regarding the setting of the DIP switch 219 and the control of the

auxiliary heater

210, 212 or 216. For example, the ON / OFF control of the

auxiliary heater

210, 212 or 216 is determined when the defrosting (defrosting) operation is performed in the air conditioner by the combination described above.

For example, as shown in FIG. 5A, in the indoor unit 200A of the ceiling-embedded installation type air conditioner, when the DIP switch 19 is set to OFF, the indoor control device 206 performs the auxiliary heater 210 in the defrost operation. Is controlled to be fixed in the OFF state. Then, the auxiliary heater 210 is not turned on alone due to problems such as safety. As shown in FIG. 2, when the auxiliary heater 10 is installed in the blowout duct 9, if the auxiliary heater 10 is turned on in the absence of air from the indoor unit 200 </ b> A, the temperature is locally increased in the blowout duct 9. This is because it may rise.

On the other hand, in the indoor unit 200A, when the DIP switch 19 is set to ON, the indoor side control device 206 performs control to turn on the auxiliary heater 212 in the defrost operation. This is because the auxiliary heater 12 is installed in the living space 11 in the case of the panel heater setting, and there are few problems such as heat-up even if the blower 2 is stopped and the wind is not sent.

Here, at the time of setting the conventional duct heater, cold air is generated by the blower during the defrost operation or the like, but it is desired that the cold air does not reach the living space as much as possible because of the heating operation. Therefore, there is a demand to suppress the minimum air volume so that the heat of the auxiliary heater 210 does not accumulate. Therefore, by setting the DIP switch 19 on the board 18, the set air volume in the blower 2 can be set to, for example, three levels of strong, medium, and weak according to the usage situation of the auxiliary heater 210 in the field. Similarly, as shown in FIG. 5B, in the indoor unit 200B of the ceiling cassette type air conditioner, only the panel heater is set. Therefore, the auxiliary heater 210 is also used during the defrost operation regardless of the setting of the DIP switch 19. Control to turn ON.

FIG. 6 is a diagram for further explaining the control of the outdoor unit 100 and the

auxiliary heaters

210, 212, or 216. Next, the interlocking of the control between the outdoor unit 100 and the

auxiliary heater

210, 212, or 216 will be described. The interlock control is performed by the indoor control device 206. When the DIP switch included in the outdoor control device 111 is set to OFF, the indoor control device 206 is based on the setting by the DIP switch 19 and the short-circuit connector 20 regardless of the operation state of the outdoor unit 100. The

auxiliary heater

210, 212 or 216 described above is controlled.

At this time, when the DIP switch 19 is set to OFF in the indoor unit 200A of the ceiling-embedded air conditioner, the heat control A is controlled regardless of the state of the outdoor unit 100, as described above. In the defrost operation, control is performed to fix the auxiliary heater 210 in the OFF state. Here, regarding the control of the heat control A, as shown in FIG. 6B, the

auxiliary heater

210, 212 or 216 is turned on when the suction temperature becomes lower than the set temperature −20 ° C. Further, when the suction temperature becomes equal to or higher than the set temperature, the

auxiliary heater

210, 212 or 216 is turned off. Here, the set temperature is −20 ° C., but the temperature is not limited to −20 ° C.

Further, when the DIP switch 19 is set to ON in the indoor unit 200A, in the case of the indoor unit 200B of the ceiling cassette type air conditioner, the control of the heat control A is normally performed, and in the defrosting operation, etc. Control to turn on the auxiliary heater 212 is performed.

On the other hand, when the DIP switch included in the outdoor control device 111 is set to ON, the indoor control device 206 controls the

auxiliary heater

210, 212, or 216 based on the operating state of the outdoor unit 100. . For example, if it is determined that the outdoor temperature detected by a temperature sensor (not shown) of the outdoor unit 100 is equal to or higher than a predetermined value, the indoor side control device 206 is connected to the auxiliary heater regardless of whether the DIP switch 19 is ON / OFF. 210, 212, or 216 is turned off.

Here, as a condition for enabling the

auxiliary heater

210, 212, or 216 to be turned on, the outdoor temperature condition is one of the conditions. For example, when various abnormalities occur during the operation of the indoor unit 200 and the outdoor unit 100, the conditions for turning on the

auxiliary heaters

210, 212, or 216 are not satisfied. For example, there is no temperature sensor abnormality related to air suction, self-diagnosis is not in progress, the blower 2 is not abnormal, refrigerant recovery mode is not operating, operation system is not abnormal, prohibited reception is not being performed, heating activation mode is not being performed, all fresh setting model is not abnormal, etc. The condition is that various conditions are satisfied.

When the DIP switch 19 is set to OFF in the indoor unit 200 </ b> A of the ceiling-embedded air conditioner, the heat control A of the heat control A is prepared even during the heating OFF preparation based on the operating state of the outdoor unit 100. Take control. Further, as described above, in the defrost operation, control is performed to fix the auxiliary heater 210 in the OFF state. Further, when the DIP switch 19 is set to OFF in the indoor unit 200A, in the case of the indoor unit 200B of the ceiling cassette type air conditioner, the heat control B is controlled during preparation for heating operation and when the operation is OFF. In the defrost operation, the auxiliary heater 212 is controlled to be turned on. Here, regarding the control of the heat control B, as shown in FIG. 6 (b), the

auxiliary heater

210, 212 or 216 is turned ON when the suction temperature becomes lower than the set temperature −18.8 ° C. If the suction temperature is equal to or higher than the set temperature, the

auxiliary heater

210, 212 or 216 is turned off.

FIG. 7 is a diagram illustrating a pattern example of control of the

auxiliary heater

210, 212, or 216 performed by the indoor control device 206. The control pattern of the

auxiliary heater

210, 212, or 216 becomes, for example, as shown in FIG. 7 depending on the setting of the DIP switch 219 of the indoor side control device 206 and the connection of the short-circuit connector 220 based on FIG.

For example, the duct model heater setting control A performs control based on the suction temperature and the set temperature regardless of the operation state of the outdoor unit 100, and controls to turn off the

auxiliary heaters

210 and 212 in defrost operation or the like. (DIP switch 19 OFF setting of the indoor unit 200A in FIG. 6). Further, the duct model heater setting control D is a control in the panel heater setting as described above, and turns on the auxiliary heater 212 and stops the fan air volume of the blower 2 in the defrost operation.

As described above, according to the indoor unit 200 of the air-conditioning apparatus of Embodiment 1, the indoor-side control device 206 has the

auxiliary heater

210, 212, or 216 depending on the combination of the setting of the DIP switch 219 and the presence / absence of connection of the short-circuit connector 220. Therefore, even if the installation type of the auxiliary heater is different, it can be set locally, for example. Further, it is possible to reduce the work time and the like without performing complicated work such as remodeling of the control device in accordance with the setting.

Also, the setting can be easily performed on site by setting the DIP switch 219. Since the duct heater setting and the panel heater setting are performed by the short-circuit connector 220, setting errors can be reduced because the setting is performed with the connector connection operation. Moreover, since the indoor-side control device 206 controls the

auxiliary heaters

210, 212, or 216 based on the operating status of the outdoor unit 100, the indoor-side control device 206 controls the auxiliary heater based on the operating status of the air conditioner. Can do.

Embodiment 2. FIG.
FIG. 8 is a diagram showing a configuration when an auxiliary heater is used, centering on a ceiling-embedded indoor unit 200A according to the second embodiment. In FIG. 8, it differs from the indoor unit 200 </ b> A of the first embodiment in that a temperature sensor 300 that is a temperature detecting means is provided in the vicinity of the auxiliary heater 10.

In the first embodiment described above, the indoor control device 206 controls the

auxiliary heater

210, 212, or 216 based on the setting by the DIP switch 19 and the short-circuit connector 20. For example, when the panel heater setting is mistakenly performed where the duct heater setting is to be performed, if it is determined that the predetermined upper limit is exceeded based on the temperature detected by the temperature sensor 300, the indoor side control device 206. Controls to turn off the

auxiliary heaters

210 and 212. In some cases, the air volume of the blower 2 is changed. Thereby, the safety | security of the heater control by the interlocking of the control setting by hardware and a software control system can be improved. Also, different installation types of heater control such as the auxiliary heater 10 and the auxiliary heaters 12 and 16 installed in the living space can be easily realized by the common indoor unit.

Furthermore, in order to eliminate the residual heat accumulated in the blowout duct 9 even after the heating operation is stopped, a residual heat removal operation function for operating the blower 2 is known. Control to operate the blower 2 was performed. However, when a large-capacity auxiliary heater is selected on site, there is a problem that residual heat is not sufficiently removed in a certain time. Therefore, it is possible to provide a function of adjusting the air volume in the blowout duct 9 by the blower 2 based on the temperature detected by the temperature sensor 300 and extending and shortening the time for the residual heat removal operation. As a result, unnecessary operation can be reduced, and residual heat removal operation suitable for various installation conditions of the auxiliary heater can be performed.

100 outdoor unit, 101 compressor, 102 four-way valve, 103 heat source side heat exchanger, 111 outdoor control device, 200, 200A, 200B indoor unit, 201 motor, 202 blower, 203 indoor heat exchanger, 204 air filter, 205 Drain pan, 206 Indoor control device, 207 Air outlet, 208 Air inlet, 209 Air outlet duct, 210 Auxiliary heater (duct heater setting), 211 Living space, 212, 216 Auxiliary heater (panel heater setting), 213 Control wiring 215 living space, 217 control wiring, 218 board, 219 DIP switch, 220 short-circuit connector, 300 temperature sensor.

Claims

In the indoor unit that controls the auxiliary heater connected by wiring,
Setting means for performing settings related to the control of the auxiliary heater;
An indoor unit comprising: a control device that controls the auxiliary heater according to a control pattern selected from predetermined control patterns based on settings made in the setting means.
The indoor unit according to claim 1, wherein the setting means is a dip switch.
The indoor unit according to claim 1 or 2, wherein the setting means is a short-circuit connector and sets whether or not the auxiliary heater is installed in the duct by the short-circuit connector.
The control device according to any one of claims 1 to 3, wherein the control device further selects the control pattern based on an operation state in an outdoor unit having at least a compressor and a heat source side heat exchanger. Indoor unit.
Further comprising temperature detecting means for detecting the temperature of the air around the auxiliary heater,
The indoor unit according to any one of claims 1 to 4, wherein the control device performs on / off control of the auxiliary heater based on the temperature detected by the temperature detection means.
An indoor unit according to any one of claims 1 to 5,
An air conditioner characterized in that a refrigerant circuit is configured by pipe-connecting an outdoor unit having a compressor and a heat source side heat exchanger.