Air conditioner

Abstract

To provide a technique that expands usage of an air conditioner.SOLUTION: An indoor unit 302 comprises a space temperature acquisition section 326 and an air condition control section 330. The air condition control section 330 has an acquisition determination section 340, a thermos-off condition identification section 342 and a thermos-off condition execution section 344. The acquisition determination section 340 determines whether the space temperature acquisition section 326 has acquired a space temperature. The thermos-off condition identification section 342 identifies one of a plurality of types of thermos-off conditions on the basis of a determination result of the acquisition determination section 340. The thermos-off condition execution section 344 executes air conditioning under the thermos-off condition identified by the thermos-off condition identification section 342.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to air conditioning technology, and more particularly to an air conditioning device that controls air conditioning in a room. [Background technology]

[0002] A central air conditioning system has been proposed that uses one air conditioner to condition multiple rooms. In such a central air conditioning system, it may be difficult to control the temperatures of multiple rooms in accordance with the set temperatures of the multiple rooms. Therefore, a second set temperature is determined based on the air conditioning intensity, which is based on the difference between the room temperatures of the multiple rooms and the first set temperature, and the intake temperature, and then the air conditioner is controlled based on the second set temperature (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-115500 Summary of the Invention [Problem to be solved by the invention]

[0004] The indoor unit of an air conditioner installed in a room executes a thermo-off operation, which is an operation to stop the outdoor unit, when the intake temperature of the sucked air reaches a certain temperature. When such an air conditioner is installed in an air-conditioned room and used in a central air-conditioning system, a situation may occur in which the intake temperature in the air-conditioned room differs from the space temperature in the room, so that the intake temperature reaches a certain temperature but the space temperature does not reach the certain temperature. In such a situation, the thermo-off operation is executed even though it should not be executed. Since such an operation is not desirable, a central air-conditioning system requires a dedicated air-conditioning unit designed separately from the general-purpose air-conditioning unit that is normally used. On the other hand, considering the manufacturing cost, it is preferable that a general-purpose air-conditioning unit rather than a dedicated unit can be used in a central air-conditioning system.

[0005] The present disclosure has been made in consideration of these circumstances, and has an object to provide a technique for expanding the usage patterns of air conditioners. [Means for solving the problem]

[0006] In order to solve the above problems, an air conditioner according to an embodiment of the present disclosure has an indoor unit and an outdoor unit, and conditions a space to be air-conditioned, the indoor unit includes a target temperature setting unit that sets a first target temperature for air conditioning, an intake temperature sensor that detects the intake temperature of air drawn into the indoor unit, a space temperature acquisition unit that acquires the space temperature of the space to be air-conditioned, and an air conditioning control unit that is connected to the target temperature setting unit, the intake temperature sensor, and the space temperature acquisition unit and controls the air conditioning. The air conditioning control unit includes an acquisition determination unit that determines whether the space temperature acquisition unit has successfully acquired the space temperature, a thermo-off condition specification unit that specifies one of a plurality of thermo-off conditions based on a result of the determination by the acquisition determination unit, and a thermo-off condition execution unit that executes air conditioning according to the thermo-off condition specified by the thermo-off condition specification unit.

[0007] Any combination of the above components, and conversion of the present disclosure into a method, device, system, recording medium, computer program, etc. are also valid aspects of the present disclosure. Effect of the Invention

[0008] According to the present disclosure, the usage patterns of air conditioners can be expanded. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a configuration of a house according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing the configuration of another house according to the embodiment. [Diagram 3] FIG. 3 is a diagram showing the configuration of the indoor unit of FIG. 1 and FIG. [Figure 4] FIG. 4 is a diagram showing a data configuration of a table held in the thermo-off condition specifying unit in FIG. [Diagram 5]FIG. 5 is a flowchart showing the procedure for identifying a thermo-off condition by the indoor unit of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Before describing the specific examples of the present disclosure, an overview of the examples will be described. This example relates to an air conditioner that can be installed in a room to be air-conditioned, and can also be installed in an air-conditioned room different from the room to be air-conditioned. The former corresponds to normal use of the air conditioner (hereinafter referred to as "normal state"), and the latter corresponds to use of the air conditioner in a central air-conditioning system (hereinafter referred to as "central air-conditioning state"). The air conditioner includes an indoor unit and an outdoor unit, and the indoor unit performs air conditioning so that the intake temperature of the sucked air approaches a constant temperature. In addition, when the constant temperature is reached, the indoor unit performs a thermo-off operation, which is an operation to stop the outdoor unit. Here, the purpose is to normally perform a thermo-off operation even if the same air conditioner is used for the normal state and the central air-conditioning state.

[0011] In normal conditions, the indoor unit of the air conditioner according to this embodiment uses a thermo-off condition (hereinafter referred to as the "normal thermo-off condition") that turns off the thermostat of the outdoor unit when the suction temperature reaches a certain temperature, as in the past. Meanwhile, in a central air-conditioning state, the indoor unit modifies the certain temperature based on the difference between the space temperature of the room to be air-conditioned and the suction temperature (hereinafter referred to as the "modified certain temperature"), and uses a thermo-off condition (hereinafter referred to as the "energy-saving thermo-off condition") that turns off the thermostat of the outdoor unit when the suction temperature reaches the modified certain temperature. The energy-saving thermo-off condition turns off the thermostat less frequently than the normal thermo-off condition, so it is less likely to execute the thermo-off when the space temperature has not yet reached a certain temperature.

[0012] In the normal state, the space temperature sensor for detecting the space temperature is not used, but in the whole-building air-conditioning state, the space temperature sensor is used. Therefore, the indoor unit determines the normal thermo-off condition when it does not acquire the space temperature from the space temperature sensor, and determines the energy-saving thermo-off condition when it acquires the space temperature from the space temperature sensor.

[0013] The examples described below each show a preferred specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, the arrangement and connection of the components, as well as the steps (processes) and the order of the steps shown in the following examples are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following examples, those components that are not described in the independent claims showing the highest concept of the present disclosure are described as optional components. In addition, in each figure, the same reference numerals are given to substantially the same configurations, and duplicated descriptions are omitted or simplified.

[0014] 1 shows the configuration of a house 500, and illustrates the normal state described above. The house 500 includes a living room 10, which is a space to be air-conditioned. The living room 10 is air-conditioned by an air conditioner 310. The air conditioner 310 has an indoor unit 302 and an outdoor unit 308, and the indoor unit 302 and the outdoor unit 308 are connected by a pipe (not shown). The indoor unit 302 is installed on a side wall 50 of the living room 10, and the outdoor unit 308 is installed outside the house 500. The indoor unit 302 is capable of wireless communication, and is connected to the operating device 400 via wireless communication.

[0015] A user uses the operation device 400 to input an air conditioning type, which is a type of air conditioning, and a set temperature of the air conditioning (hereinafter referred to as a "first target temperature") into the operation device 400. The air conditioning type is, for example, heating operation or cooling operation. The operation device 400 transmits the input air conditioning type and first target temperature to the indoor unit 302 by wireless communication. Upon receiving the air conditioning type and first target temperature from the operation device 400, the indoor unit 302 performs air conditioning, for example heating or cooling, in accordance with the air conditioning type and the first target temperature. The indoor unit 302 can turn off the thermostat of the outdoor unit 308, which will be described later.

[0016] FIG. 2 shows the configuration of a house 600 and the above-mentioned central air-conditioning state. The house 600 includes living rooms 10, common spaces 16 such as corridors, and an air-conditioned room 18, which are spaces to be air-conditioned. The central air-conditioning system installed in the house 600 includes an outside air inlet 100, an outside air inlet duct 102, a heat exchanger device 104, an exhaust duct 106, an exhaust port 108, an air supply duct 110, a ventilation port 114, a conveying duct 122, an air outlet 128, an air supply port 140, and an outdoor unit 308. The outside air inlet duct 102, the exhaust duct 106, the air supply duct 110, and the conveying duct 122 are pipes that convey air, that is, air paths. The central air-conditioning system also includes a central air-conditioning unit 300, an operating device 400, and a space temperature sensor 402. The central air conditioning unit 300 includes an indoor unit 302, a HEPA (High Efficiency Particulate Air) filter 304, and a blower 306. The indoor unit 302, the HEPA filter 304, and the blower 306 are arranged in this order from the top of the central air conditioning unit 300. The indoor unit 302 and the outdoor unit 308 are included in an air conditioning unit 310, and the indoor unit 302 and the outdoor unit 308 are connected by a pipe (not shown).

[0017] An outdoor air inlet 100 and an exhaust outlet 108 are installed on a wall surface of the house 600, and an outdoor unit 308 is also installed. An outdoor air inlet duct 102 extending from the outdoor air inlet 100 toward the inside of the house 600 is connected to a heat exchanger device 104. An exhaust duct 106 is also connected to the heat exchanger device 104, and the exhaust duct 106 extends toward the wall surface of the house 600 and is connected to the exhaust outlet 108. An air supply duct 110 is also connected to the heat exchanger device 104. The outdoor air inlet duct 102, the exhaust duct 106, the heat exchanger device 104, and the air supply duct 110 are arranged in the attic 40.

[0018] The heat exchanger device 104 is also called a heat exchange type ventilation fan. The heat exchanger device 104 takes in outside air 200 from the outside air inlet 100 through the outside air inlet duct 102. The outside air 200 sucked in from the outside air inlet 100 corresponds to supply air. The heat exchanger device 104 also takes in ventilation RA (return air) 202 from the ventilation port 114. The ventilation RA 202 is air that has flowed in from inside the house 600. The heat exchanger device 104 exchanges heat between them. As a result of the heat exchange, the heat exchanger device 104 exhausts exhaust air 204 from the exhaust port 108 through the exhaust duct 106. The heat exchanger device 104 also supplies the heat-exchanged supply air 208 to the central air-conditioning unit 300 via the supply air duct 110.

[0019] An air supply port 140 is provided in the ceiling of the air-conditioned room 18, and an air supply duct 110 is connected to the air supply port 140. The air supply port 140 blows out supply air 208 from the heat exchanger device 104 into the air-conditioned room 18 via the air supply duct 110. A central air-conditioning unit 300 is provided in the air-conditioned room 18. The supply air 208 flows into the central air-conditioning unit 300 from the air supply duct 110, and circulating air RA206 flows in from inside the house 600. The circulating air RA206 is air that has flowed in from inside the house 600, similar to the ventilation air RA202.

[0020] 1, and performs air conditioning on the mixture of supply air and circulating RA 206. For example, the indoor unit 302 controls temperature, humidity, etc. The indoor unit 302 heats or cools the air that has flowed into the air-conditioned room 18, i.e., the mixture of circulating RA 206 and supply air 208, so that the temperature of the air inside the central air-conditioning unit 300 (air-conditioned room 18) becomes a first target temperature.

[0021] The HEPA filter 304 is an air filter that removes dirt, dust, and the like from the air conditioned by the indoor unit 302 and outputs purified air. The blower 306 transports the air conditioned by the indoor unit 302 and purified by the HEPA filter 304 to the air outlet 128 via the transport duct 122. The blower 306 can be controlled independently of the indoor unit 302.

[0022] The transport duct 122 connected to the central air conditioning unit 300 is connected to the air outlet 128 from the air conditioning room 18 through the ceiling space 40. The air outlet 128 is installed on the surface of the ceiling 34 of the living room 10. The air outlet 128 may be installed on the surface of the side wall 50 of the living room 10. The air outlet 128 discharges the air blown from the central air conditioning unit 300 toward the floor surface 36 of the living room 10. By blowing out the air from the air outlet 128, the air originally present in the living room 10 circulates within the living room 10. A part of the circulating air flows into the air conditioning room 18 via the louver 32 as the circulating air 206. In the air conditioning room 18, the air obtained by mixing the circulating air 206 and the supply air 208 is taken into the central air conditioning unit 300. Another part of the circulating air is taken into the heat exchanger device 104 from the ventilation port 114 as the ventilation air 202.

[0023] The space temperature sensor 402 is installed in the living room 10. The space temperature sensor 402 detects the space temperature in the living room 10. The space temperature sensor 402 has a wireless or wired communication function, and transmits the detected space temperature to the indoor unit 302.

[0024] As in Fig. 1, the user uses the operation device 400 to input the air conditioning type and the first target temperature into the operation device 400. The operation device 400 transmits the input air conditioning type and first target temperature to the indoor unit 302 by wireless communication. When the indoor unit 302 receives the air conditioning type and the first target temperature from the operation device 400, it performs air conditioning, for example heating or cooling, in accordance with the air conditioning type and the first target temperature. At that time, the indoor unit 302 may use the space temperature received from the space temperature sensor 402. The indoor unit 302 can turn off the thermostat of the outdoor unit 308, which will be described later.

[0025] 3 shows the configuration of the indoor unit 302. The indoor unit 302 includes a space type determination unit 320, a target temperature setting unit 322, an intake temperature sensor 324, a space temperature acquisition unit 326, and an air conditioning control unit 330. The air conditioning control unit 330 includes an acquisition determination unit 340, a thermo-off condition specification unit 342, and a thermo-off condition execution unit 344.

[0026] The space type determination unit 320 receives the air conditioning type from the operating device 400. The space type determination unit 320 determines whether the air conditioning type is heating operation or cooling operation. The space type determination unit 320 sets the determined air conditioning type in the air conditioning control unit 330. The target temperature setting unit 322 receives a first target temperature from the operating device 400. The target temperature setting unit 322 sets the first target temperature in the air conditioning control unit 330. The suction temperature sensor 324 is disposed near an air inlet (not shown) provided in an upper portion of the indoor unit 302, and detects the suction temperature of air drawn into the indoor unit 302. The suction temperature sensor 324 outputs the detected suction temperature to the air conditioning control unit 330.

[0027] The space temperature acquisition unit 326 includes a connector capable of being connected to the space temperature sensor 402 by wire or a communication unit capable of being connected wirelessly to the space temperature sensor 402. When the indoor unit 302 is in the normal state of FIG. 1, the space temperature sensor 402 is not placed in the living room 10, and therefore the space temperature acquisition unit 326 is not connected to the space temperature sensor 402. Therefore, the space temperature acquisition unit 326 does not acquire the detected space temperature from the space temperature sensor 402. When the indoor unit 302 is in the whole-building air-conditioning state of FIG. 2, the space temperature acquisition unit 326 is connected to the space temperature sensor 402. Therefore, the space temperature acquisition unit 326 acquires the detected space temperature from the space temperature sensor 402. The space temperature acquisition unit 326 outputs information indicating that the space temperature is not acquired (hereinafter referred to as "acquisition failure information") or the acquired space temperature to the air conditioning control unit 330.

[0028] The air conditioning control unit 330 is connected to the space type determination unit 320, the target temperature setting unit 322, the suction temperature sensor 324, and the space temperature acquisition unit 326. The air conditioning control unit 330 controls the air conditioning based on the air conditioning type set in the space type determination unit 320 and the first target temperature set in the target temperature setting unit 322. For example, the air conditioning control unit 330 performs heating operation or cooling operation so that the suction temperature approaches the first target temperature. Known techniques may be used to control the temperature or humidity in such air conditioning control.

[0029] The following describes the thermo-off control of the outdoor unit 308 by the indoor unit 302. The acquisition determination unit 340 of the air conditioning control unit 330 determines whether the space temperature acquisition by the space temperature acquisition unit 326 has been successful. Specifically, when the space temperature is received from the space temperature acquisition unit 326, the acquisition determination unit 340 determines that the space temperature acquisition by the space temperature acquisition unit 326 has been "successful". This corresponds to determining that the space temperature acquisition by the space temperature acquisition unit 326 has been "successful" when the space temperature sensor 402 and the space temperature acquisition unit 326 are communicably connected. When the acquisition failure information is received from the space temperature acquisition unit 326, the acquisition determination unit 340 determines that the space temperature acquisition by the space temperature acquisition unit 326 has been "failed". This corresponds to determining that the space temperature acquisition by the space temperature acquisition unit 326 has been "failed" when the space temperature sensor 402 and the space temperature acquisition unit 326 are not communicably connected.

[0030] The thermo-off condition determination unit 342 determines one of a plurality of thermo-off conditions based on the determination result by the acquisition determination unit 340. Specifically, when the space temperature acquisition unit 326 determines that the space temperature has not been acquired, that is, when the space temperature is in a normal state, the thermo-off condition determination unit 342 determines a normal thermo-off condition that uses the first target temperature and the intake temperature. On the other hand, when the space temperature acquisition unit 326 determines that the space temperature has been acquired, that is, when the entire building is in an air-conditioned state, the thermo-off condition determination unit 342 determines an energy-saving thermo-off condition that uses the first target temperature, the intake temperature, and the space temperature. As described above, the energy-saving thermo-off condition has a lower frequency of thermo-off than the normal thermo-off condition.

[0031] 4 shows the data configuration of a table held in the thermo-off condition identifying unit 342. When the acquisition of the space temperature is determined to be "no" and the air conditioning type is determined to be "heating operation", the thermo-off condition identifying unit 342 identifies the normal thermo-off condition (during heating operation). Under the normal thermo-off condition (during heating operation), the thermo is turned off when the suction temperature becomes higher than the first target temperature by a predetermined temperature or more. Also, when the acquisition of the space temperature is determined to be "no" and the air conditioning type is determined to be "cooling operation", the thermo-off condition identifying unit 342 identifies the normal thermo-off condition (during cooling operation). Under the normal thermo-off condition (during cooling operation), the thermo is turned off when the suction temperature becomes lower than the first target temperature by a predetermined temperature or more.

[0032] If the space temperature acquisition is determined to be "successful" and the air conditioning type is determined to be "heating operation", the thermo-off condition determination unit 342 determines the energy-saving thermo-off condition (during heating operation). The insufficient conditioning temperature is calculated by subtracting the space temperature from the first target temperature. The insufficient conditioning temperature is the temperature that is insufficient in the space to be air-conditioned. In addition, the second target temperature is calculated by adding the insufficient conditioning temperature to the first target temperature. Under the energy-saving thermo-off condition (during heating operation), the thermo is turned off when the suction temperature becomes a predetermined temperature or more higher than the second target temperature.

[0033] If the space temperature acquisition is determined to be "successful" and the air conditioning type is determined to be "cooling operation", the thermo-off condition determination unit 342 determines the energy-saving thermo-off condition (during cooling operation). The insufficient conditioning temperature is calculated by subtracting the first target temperature from the space temperature. Also, the second target temperature is calculated by subtracting the insufficient conditioning temperature from the first target temperature. Under the energy-saving thermo-off condition (during heating operation), the thermo is turned off when the suction temperature becomes lower than the second target temperature by a predetermined temperature or more. Return to FIG. 3.

[0034] The thermo-off condition execution unit 344 executes the thermo-off of the outdoor unit 308 when the normal thermo-off condition or the energy-saving thermo-off condition specified by the thermo-off condition specification unit 342 is satisfied.

[0035] In the following, the normal thermo-off condition and the energy-saving thermo-off condition during heating operation will be explained using specific temperatures. It is assumed that the first target temperature set in the indoor unit 302 is "25°C", the intake temperature in the indoor unit 302 is "26°C", and the predetermined temperature is "1°C".

[0036] Under normal thermo-off conditions, the first target temperature + the predetermined temperature is 26°C. Therefore, when the suction temperature is equal to or higher than the first target temperature + the predetermined temperature, that is, equal to or higher than 26°C, the outdoor unit 308 is thermo-off. When the indoor unit 302 is installed in the living room 10 as shown in FIG. 1, the space temperature in the living room 10 becomes close to the suction temperature. Therefore, when the space temperature reaches 26°C, the outdoor unit 308 is thermo-off.

[0037] When the indoor unit 302 is not installed in the room 10 as shown in FIG. 2, the space temperature in the room 10 is lower than the intake temperature. Therefore, it is assumed that the space temperature is "24°C". In this situation, the insufficient conditioning temperature is "1°C" which is the first target temperature - the space temperature, and the second target temperature is "26°C" which is the first target temperature + the insufficient conditioning temperature. As a result, under the energy saving thermo-off condition, the second target temperature + the predetermined temperature is "27°C". Therefore, when the intake temperature is equal to or higher than the second target temperature + the predetermined temperature, that is, equal to or higher than 27°C, the outdoor unit 308 is thermo-off. Therefore, even if the temperature in the air-conditioned room 18 is 26°C, the thermo-off is not performed.

[0038] The subject of the device, system, or method in the present disclosure includes a computer. The computer executes a program to realize the function of the subject of the device, system, or method in the present disclosure. The computer includes a processor that operates according to a program as a main hardware configuration. The type of the processor does not matter as long as it can realize the function by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). The multiple electronic circuits may be integrated into one chip or may be provided on multiple chips. The multiple chips may be integrated into one device or may be provided on multiple devices. The program is recorded on a non-transitory recording medium such as a computer-readable ROM, an optical disk, or a hard disk drive. The program may be stored in the recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet.

[0039] The operation of the air conditioner 310 configured as above will be described. Fig. 5 is a flow chart showing the procedure for identifying the thermo-off condition by the indoor unit 302. If the acquisition determination unit 340 determines that acquisition of the space temperature was unsuccessful (N in S10), the thermo-off condition identification unit 342 identifies the normal thermo-off condition (S12). If the acquisition determination unit 340 determines that acquisition of the space temperature was successful (Y in S10), the thermo-off condition identification unit 342 identifies the energy-saving thermo-off condition (S14).

[0040] According to this embodiment, one of a plurality of types of thermo-off conditions is specified based on the result of the determination as to whether the space temperature has been acquired, and air conditioning is performed under the specified thermo-off condition, so that the thermo-off condition can be changed according to the usage mode of the air conditioner 310. In addition, since the thermo-off condition is changed according to the usage mode of the air conditioner 310, the usage mode of the air conditioner 310 can be expanded. In addition, since the normal thermo-off condition is specified when the space temperature has not been acquired, and the energy-saving thermo-off condition in which the thermo-off frequency is lower than that of the normal thermo-off condition is specified when the space temperature has been acquired, it is possible to make it difficult for the indoor unit 302 to be thermo-off when the indoor unit 302 is installed in the air-conditioned room 18. In addition, since the normal thermo-off condition is specified when the space temperature has not been acquired, and the energy-saving thermo-off condition in which the thermo-off frequency is lower than that of the normal thermo-off condition is specified when the space temperature has been acquired, the same indoor unit 302 can be used when the indoor unit 302 is installed in the living room 10 and when the indoor unit 302 is installed in the air-conditioned room 18.

[0041] Moreover, since it is determined that the space temperature has been acquired when the space temperature sensor 402 and the space temperature acquisition unit 326 are connected so as to be able to communicate with each other, the determination can be simplified. Moreover, since a connector capable of wired connection is provided to the space temperature sensor 402, the space temperature can be acquired from the space temperature sensor 402 when the space temperature sensor 402 is connected. Moreover, since a communication unit capable of wireless connection with the space temperature sensor 402 is provided, the space temperature can be acquired from the space temperature sensor 402 when the space temperature sensor 402 is connected.

[0042] Furthermore, when the air conditioning type is determined to be heating operation and the space temperature acquisition is determined to be successful, energy-saving thermo-off conditions using the first target temperature, space temperature, and suction temperature are identified, so that thermo-off can be appropriately executed when performing heating operation in the whole-building air-conditioning state. Furthermore, when the air conditioning type is determined to be cooling operation and the space temperature acquisition is determined to be successful, energy-saving thermo-off conditions using the first target temperature, space temperature, and suction temperature are identified, so that thermo-off can be appropriately executed when performing cooling operation in the whole-building air-conditioning state.

[0043] Furthermore, if the air conditioning type is determined to be heating operation and it is determined that the space temperature has not been acquired, a normal thermo-off condition using the suction temperature and the first target temperature is identified, so that the thermo-off can be appropriately executed when performing heating operation in a normal state. Furthermore, if the air conditioning type is determined to be cooling operation and it is determined that the space temperature has not been acquired, a normal thermo-off condition using the suction temperature and the first target temperature is identified, so that the thermo-off can be appropriately executed when performing cooling operation in a normal state.

[0044] An outline of one aspect of the present disclosure is as follows. (Item 1) An air conditioner (310) that has an indoor unit (302) and an outdoor unit (308) and conditions an air-conditioning target space, The indoor unit (302) a target temperature setting unit (322) that sets a first target temperature of the air conditioning; an intake temperature sensor (324) for detecting an intake temperature of air drawn into the indoor unit (302); a space temperature acquisition unit (326) for acquiring a space temperature of the air conditioned space; an air conditioning control unit (330) connected to the target temperature setting unit (322), the suction temperature sensor (324), and the space temperature acquisition unit (326) to control air conditioning; The air conditioning control unit (330) an acquisition determination unit (340) that determines whether acquisition of the space temperature by the space temperature acquisition unit (326) has been successful; a thermo-off condition specifying unit (342) that specifies one of a plurality of thermo-off conditions based on a result of the determination by the acquisition determination unit (340); The air conditioner (310) comprises: a thermo-off condition execution unit (344) that executes air conditioning under the thermo-off condition specified by the thermo-off condition specification unit (342).

[0045] (Item 2) The thermo-off condition specifying unit (342) If the space temperature acquisition unit (326) has not acquired the space temperature, a normal thermo-off condition is specified using the first target temperature and the suction temperature; 2. The air conditioning device (310) according to item 1, wherein, when the acquisition of the space temperature by the space temperature acquisition unit (326) is successful, an energy-saving thermo-off condition is identified using the first target temperature, the inlet temperature, and the space temperature, and a thermo-off frequency is lower than that of the normal thermo-off condition.

[0046] (Item 3) The acquisition determination unit (340) The air conditioning device (310) according to item 2, wherein, when a space temperature sensor that detects the space temperature and the space temperature acquisition unit (326) are connected so as to be able to communicate with each other, it is determined that the space temperature acquisition unit (326) has acquired the space temperature successfully.

[0047] (Item 4) The space temperature acquisition unit (326) 4. The air conditioning device (310) according to item 3, comprising a connector that can be connected to the space temperature sensor by wire.

[0048] (Item 5) The space temperature acquisition unit (326) Item 4. The air conditioner (310) according to item 3, further comprising a communication unit capable of wirelessly connecting to the space temperature sensor.

[0049] (Item 6) An air conditioning type determination unit (320) that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit (320) determines that the air conditioning type is heating operation and the acquisition determination unit (340) determines that the acquisition of the space temperature is successful, The thermo-off condition specifying unit (342) calculating a deficiency air-conditioning temperature, which is a temperature that is insufficient in the air-conditioned space, based on the first target temperature and the space temperature, and identifying the energy-saving thermo-off condition for turning off the thermostat when the suction temperature becomes higher by a predetermined temperature or more than a second target temperature obtained by adding the deficiency air-conditioning temperature to the first target temperature; The thermo-off condition execution unit (344) 6. The air conditioner (310) according to any one of items 2 to 5, wherein the air conditioning is performed under the energy-saving thermo-off condition set by the thermo-off condition specifying unit (342).

[0050] (Item 7) An air conditioning type determination unit (320) that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit (320) determines that the air conditioning type is cooling operation and the acquisition determination unit (340) determines that the acquisition of the space temperature is successful, The thermo-off condition specifying unit (342) calculating a deficiency air-conditioning temperature, which is a temperature that is insufficient in the air-conditioned space, based on the first target temperature and the space temperature, and identifying the energy-saving thermo-off condition for turning off the thermostat when the suction temperature becomes lower by a predetermined temperature or more than a second target temperature obtained by subtracting the deficiency air-conditioning temperature from the first target temperature; The thermo-off condition execution unit (344) 6. The air conditioner (310) according to any one of items 2 to 5, wherein the air conditioning is performed under the energy-saving thermo-off condition set by the thermo-off condition specifying unit (342).

[0051] (Item 8) An air conditioning type determination unit (320) that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit (320) determines that the air conditioning type is heating operation and the acquisition determination unit (340) determines that the space temperature has not been acquired, The thermo-off condition specifying unit (342) specifying the normal thermo-off condition for turning off the thermostat when the suction temperature becomes higher than the first target temperature by a predetermined temperature or more; The thermo-off condition execution unit (344) 6. The air conditioner (310) according to any one of items 2 to 5, wherein the air conditioning is performed under the normal thermo-off condition specified by the thermo-off condition specifying unit (342).

[0052] (Item 9) An air conditioning type determination unit (320) that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit (320) determines that the air conditioning type is cooling operation and the acquisition determination unit (340) determines that the space temperature has not been acquired, The thermo-off condition specifying unit (342) specifying the normal thermo-off condition for turning off the thermostat when the suction temperature becomes lower than the first target temperature by a predetermined temperature or more; The thermo-off condition execution unit (344) 6. The air conditioner (310) according to any one of items 2 to 5, wherein the air conditioning is performed under the normal thermo-off condition specified by the thermo-off condition specifying unit (342).

[0053] (Item 10) The indoor unit (302) a thermo-off control setting unit that accepts a setting of either the normal thermo-off condition or the energy-saving thermo-off condition regardless of a determination result of the acquisition determination unit (340); The air conditioning control unit (330) 3. The air conditioner (310) according to item 2, further comprising an abnormality notification unit that notifies of an abnormality when the energy-saving thermo-off condition is set by the thermo-off control setting unit and the acquisition determination unit (340) determines that the acquisition of the space temperature has not been successful.

[0054] The present disclosure has been described above based on the embodiments. These embodiments are merely illustrative, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component or each treatment process, and that such modifications are also within the scope of the present disclosure.

[0055] In this embodiment, the thermo-off condition specification unit 342 automatically specifies the normal thermo-off condition and the energy-saving thermo-off condition. However, this is not limited to this, and for example, the normal thermo-off condition and the energy-saving thermo-off condition may be set by the installer using the operation device 400. The indoor unit 302 includes a thermo-off control setting unit, which accepts the setting of either the normal thermo-off condition or the energy-saving thermo-off condition regardless of the judgment result of the acquisition judgment unit 340. At that time, the air conditioning control unit 330 may include an abnormality notification unit, which notifies an abnormality when the energy-saving thermo-off condition is set by the thermo-off control setting unit and the acquisition judgment unit 340 judges that the space temperature has not been acquired. According to this modified example, since the setting of either the normal thermo-off condition or the energy-saving thermo-off condition is accepted, the thermo-off condition can be manually set. Furthermore, since the energy-saving thermo-off condition is set and it is judged that the space temperature has not been acquired, an abnormality is notified, so that an error in the setting can be notified. [Explanation of symbols]

[0056] 10 living room, 16 shared space, 18 air-conditioning room, 32 louver, 34 ceiling, 36 floor, 40 ceiling, 50 side wall, 100 outdoor air intake, 102 outdoor air intake duct, 104 heat exchanger device, 106 exhaust duct, 108 exhaust vent, 110 supply air duct, 114 ventilation vent, 122 transport duct, 128 air outlet, 140 supply air vent, 200 outdoor air, 202 ventilation RA, 204 exhaust, 206 circulation RA, 208 supply air, 300 whole-building air-conditioning unit, 302 indoor unit, 304 HEPA filter, 306 blower, 308 outdoor unit, 310 air-conditioning device, 320 Space type determination unit, 322 target temperature setting unit, 324 suction temperature sensor, 326 space temperature acquisition unit, 330 air conditioning control unit, 340 acquisition determination unit, 342 thermo-off condition specification unit, 344 thermo-off condition execution unit, 400 operation device, 402 space temperature sensor, 500, 600 residence.

Claims

1. An air conditioning device having an indoor unit and an outdoor unit for conditioning a space to be air-conditioned, The indoor unit includes: a target temperature setting unit that sets a first target temperature of the air conditioning; an intake temperature sensor that detects the intake temperature of air drawn into the indoor unit; a space temperature acquisition unit for acquiring a space temperature of the air conditioned space; an air conditioning control unit that is connected to the target temperature setting unit, the suction temperature sensor, and the space temperature acquisition unit and controls air conditioning; The air conditioning control unit is an acquisition determination unit that determines whether the space temperature acquisition unit has acquired the space temperature; a thermo-off condition specifying unit that specifies one of a plurality of thermo-off conditions based on a result of the determination by the acquisition and determination unit; a thermo-off condition execution unit that executes air conditioning under the thermo-off condition specified by the thermo-off condition specification unit.

2. The thermo-off condition specifying unit is If the space temperature acquisition unit has not acquired the space temperature, a normal thermo-off condition is specified using the first target temperature and the suction temperature; 2. The air conditioning device according to claim 1, wherein when the acquisition of the space temperature by the space temperature acquisition unit is successful, the first target temperature, the suction temperature, and the space temperature are used to identify an energy-saving thermo-off condition that has a lower frequency of thermo-off than the normal thermo-off condition.

3. The acquisition determination unit is The air conditioning apparatus according to claim 2 , wherein when a space temperature sensor that detects the space temperature and the space temperature acquisition unit are communicably connected, it is determined that the space temperature acquisition unit has acquired the space temperature successfully.

4. The space temperature acquisition unit is The air conditioning device according to claim 3 , further comprising a connector capable of being connected to the space temperature sensor by wire.

5. The space temperature acquisition unit is The air conditioner according to claim 3 , further comprising a communication unit capable of wirelessly connecting to the space temperature sensor.

6. An air conditioning type determination unit that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit determines that the air conditioning type is heating operation and the acquisition determination unit determines that the acquisition of the space temperature is successful, The thermo-off condition specifying unit is calculating a deficiency air-conditioning temperature, which is a temperature that is insufficient in the air-conditioned space, based on the first target temperature and the space temperature; and identifying the energy-saving thermo-off condition for turning off the thermostat when the suction temperature becomes higher by a predetermined temperature or more than a second target temperature obtained by adding the deficiency air-conditioning temperature to the first target temperature; The thermo-off condition execution unit is The air conditioning device according to claim 2 , wherein the air conditioning is performed under the energy-saving thermo-off condition set by the thermo-off condition specifying unit.

7. An air conditioning type determination unit that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit determines that the air conditioning type is cooling operation and the acquisition determination unit determines that the acquisition of the space temperature is successful, The thermo-off condition specifying unit is calculating a deficiency air-conditioning temperature, which is a temperature that is insufficient in the air-conditioned space, based on the first target temperature and the space temperature, and identifying the energy-saving thermo-off condition for turning off the thermostat when the suction temperature becomes lower by a predetermined temperature or more than a second target temperature obtained by subtracting the insufficient air-conditioning temperature from the first target temperature; The thermo-off condition execution unit is The air conditioning device according to claim 2 , wherein the air conditioning is performed under the energy-saving thermo-off condition set by the thermo-off condition specifying unit.

8. An air conditioning type determination unit that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit determines that the air conditioning type is heating operation and the acquisition determination unit determines that the space temperature has not been acquired, The thermo-off condition specifying unit is specifying the normal thermo-off condition for turning off the thermostat when the suction temperature becomes higher than the first target temperature by a predetermined temperature or more; The thermo-off condition execution unit is The air conditioning device according to claim 2 , wherein the air conditioning is performed under the normal thermo-off condition specified by the thermo-off condition specifying unit.

9. An air conditioning type determination unit that determines an air conditioning type, which is the type of the air conditioning, When the air conditioning type determination unit determines that the air conditioning type is cooling operation and the acquisition determination unit determines that the space temperature has not been acquired, The thermo-off condition specifying unit is specifying the normal thermo-off condition for turning off the thermostat when the suction temperature becomes lower than the first target temperature by a predetermined temperature or more; The thermo-off condition execution unit is The air conditioning device according to claim 2 , wherein the air conditioning is performed under the normal thermo-off condition specified by the thermo-off condition specifying unit.

10. The indoor unit includes: a thermo-off control setting unit that accepts a setting of either the normal thermo-off condition or the energy-saving thermo-off condition regardless of a determination result of the acquisition determination unit, The air conditioning control unit is The air conditioning device according to claim 2 , further comprising an abnormality notification unit that notifies of an abnormality when the energy saving thermo-off condition is set by the thermo-off control setting unit and the acquisition determination unit determines that the acquisition of the space temperature is not possible.

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