JP7189080B2 - air conditioning system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system that interlocks a warm air heating operation of an indoor unit with a floor heating operation of a floor heating terminal.

Conventionally, in this type of air conditioning system, as described in Patent Document 1, when the user sets the temperature level of hot water to the floor heating terminal during interlocking operation between the floor heating terminal and the indoor unit, the temperature of the indoor unit is changed. In some, the air heating capacity was automatically adjusted to achieve a corresponding room temperature.

JP 2013-210145 A

In this conventional system, the user sets the temperature level of the hot water, and the indoor unit is controlled so as to achieve the corresponding room temperature. However, it is usually the room temperature that the user wants to adjust, and with the conventional method, the user does not know how many degrees the temperature level set by the user corresponds to the room temperature, and it is difficult for the user to intuitively adjust the room temperature. Therefore, it is difficult for the user to obtain the desired feeling of heating during the interlocking operation.

In order to solve the above problems, claim 1 of the present invention provides an indoor unit including an indoor heat exchanger that exchanges heat between indoor air in an air-conditioned space and a refrigerant, and heats the floor surface of the air-conditioned space. A water-refrigerant heat exchanger, comprising a floor heating terminal for heating, a refrigerant passage and a water passage, performing heat exchange between the refrigerant in the refrigerant passage and the water in the water passage, and heat exchange between the refrigerant and the outside air. an outdoor heat exchanger that performs the following: an outdoor unit comprising a compressor; a first remote control for operating the indoor unit, comprising setting means for setting the room temperature in the air-conditioned space; and the floor a second remote controller for operating a heating terminal, wherein the water passage of the water-refrigerant heat exchanger and the floor heating terminal are connected in a ring by hot water pipes to form a hot water circulation circuit; A heat exchanger, the refrigerant passage of the water-refrigerant heat exchanger, the outdoor heat exchanger, and the compressor are connected by refrigerant pipes to form a refrigerant circulation circuit, and the indoor unit heats the indoor air. In an air conditioning system capable of interlocking warm air heating operation and floor heating operation in which the floor surface is heated by the floor heating terminal, a plurality of predetermined temperature ranges for the room temperature and corresponding to each temperature range and the temperature level of hot water to be supplied to the floor heating terminal through the hot water circulation circuit, and the temperature level of the hot water corresponding to the set room temperature set by the setting means. temperature level determining means for determining, target temperature determining means for determining a corresponding target return temperature or target outgoing temperature according to the temperature level of the hot water determined by the temperature level determining means, and the hot water circulation circuit a compressor control means for controlling the rotation speed of the compressor so that the temperature of the hot water flowing through the be.

Further, in claim 3, the hot water circulation circuit includes a forward pipeline for introducing hot water in the water passage heated by heat from the refrigerant passage of the water-refrigerant heat exchanger to the floor heating terminal, a return pipeline for returning the hot water introduced through the forward pipeline and radiated by the floor heating terminal from the floor heating terminal, wherein the hot water is returned in the return pipeline. Return temperature detection means for detecting the temperature or return temperature detection means for detecting the return temperature of the hot water in the return pipeline, and the target temperature determination means includes the temperature level and a predetermined temperature corresponding to each temperature level. Determining the target return temperature or the target going temperature corresponding to the temperature level of the hot water determined by the temperature level determining means based on the correlation between the determined target return temperature or the target going temperature and the compressor control means sets the return temperature detected by the return temperature detection means or the forward temperature detected by the forward temperature detection means to the target return temperature determined by the target temperature determination means. The number of revolutions of the compressor is controlled so as to achieve the temperature or the target forward temperature .

Further, in claim 4, there is provided temperature level correction means for setting a desired correction value for the temperature level of the hot water determined by the temperature level determination means, and performing correction using this correction value, wherein the target The temperature determining means determines the target return temperature or the target forward temperature according to the temperature level corrected by the temperature level correcting means.

Further, in claim 5, the correction value is a fixed value that is set based on an operation via the first remote controller or the second remote controller.

Further, in claim 6, the indoor unit has room temperature detection means for detecting the actual room temperature of the air-conditioned space, and the correction value is the difference between the actual room temperature detected by the room temperature detection means and the set room temperature. It is set variably according to the difference between .

Further, in claim 7, the interlocking operation includes a first step in which the hot air heating operation is performed without performing the floor heating operation after the compressor is started, and the room temperature in the target space in the first step. A second stage in which the floor heating operation and the warm air heating operation are performed in parallel according to the increase in the warm air heating operation according to the increase in the room temperature in the target space in the second stage. and a third step of performing the floor heating operation without performing the temperature level correction on the temperature level of the hot water and water determined by the temperature level determination means in the third step. The means performs correction using the correction value, and the compressor control means controls the rotation speed of the compressor in accordance with the temperature level after the correction.

Further, in claim 8, at an appropriate timing after the correction value is set until the interlocking operation is finished, a correction value storage means for storing the correction value at that point in time, and after the interlocking operation is finished, correction value acquisition means for reading out the correction value stored in the correction value storage means when the interlocked operation is newly started and the temperature level correction means is shifted to the third stage; The temperature level of the hot water determined by the temperature level determination means is corrected using the correction value read by the correction value acquisition means, and the target temperature determination means is configured to correct the temperature level correction means. The target return temperature or the target going temperature is determined using the temperature level after correction by.

According to claim 1 of the present invention, the interlocking operation of the floor heating operation of the floor heating terminal to which hot water is supplied from the hot water circulation circuit and the warm air heating operation of the indoor unit to which the refrigerant is supplied from the refrigerant circulation circuit is performed. It can be carried out.
At that time, the user can adjust the strength of the heating using the first remote controller for operating the indoor unit. That is, when the user sets the room temperature using the setting means provided in the first remote controller, the temperature level determination means determines the temperature level of hot water to be supplied to the floor heating terminal corresponding to the set room temperature. Then, the compressor control means controls the rotational speed of the compressor provided in the outdoor unit according to the determined temperature level of hot water. As a result, the floor heating capacity of the floor heating terminal to which hot water heated by heat exchange with the refrigerant introduced from the compressor is supplied is adjusted.
As described above, in the present invention, when the indoor unit and the floor heating terminal operate in conjunction with each other, the user simply sets the room temperature for the indoor unit using the first remote control, and the floor heating of the floor heating terminal is performed. Capacity is automatically controlled to the appropriate intensity corresponding to the room temperature setting.
As a result, compared to the conventional method in which the user sets the temperature level to the floor heating terminal and the warm air heating capacity of the indoor unit is automatically adjusted, the user can intuitively adjust the temperature, and the temperature can be adjusted as desired. You can feel the warmth.

Further, according to claim 2, when the temperature level determination means determines the temperature level, a simple calculation can be performed by referring to the correlation between the temperature division of the set room temperature and the temperature level, which is stored in advance in the correlation storage means. can quickly and reliably determine the temperature level.

According to claim 3, the target return temperature is determined according to the temperature level corresponding to the room temperature set by the user, and the rotation speed of the compressor is determined by the return temperature of hot water in the return pipe from the floor heating terminal. , is controlled to achieve the target return temperature. Thereby, the floor heating capability of the floor heating terminal can be reliably adjusted to the intensity corresponding to the room temperature setting by the user.

In addition, according to claim 4, for example, the thermal insulation and airtight structure around the air-conditioned space, the floor structure, the type of mat around the floor heating terminal, the variation unique to each terminal due to the floor heating installation rate, etc., and the user's personal The temperature level is corrected by incorporating preferences, etc. as correction values. By controlling the rotation speed of the compressor using the corrected temperature level, finer adjustment can be performed to obtain a good feeling of heating.

Further, according to claim 5, by fixing the correction value, it is possible to reliably perform stable correction that matches the user's personal preference.

In addition, according to claim 6, by making the correction value variable according to the difference between the set room temperature and the actual room temperature, the floor heating capacity can be flexibly adjusted according to the situation of the air-conditioned space, which fluctuates from moment to moment. Precise adjustments can be made.

Further, according to claim 7, after the compressor is started, if the space to be air-conditioned is not yet warmed up, the warm air heating operation is performed without performing the floor heating operation (first stage), and after that, when the room temperature rises, Accordingly, the floor heating operation and the warm air heating operation are performed in parallel (second step). After that, when the room temperature is sufficiently raised and stabilized, the warm air heating operation is stopped and only the floor heating operation is performed (third stage). In this state, the temperature level determined corresponding to the set room temperature is corrected, and the rotation speed of the compressor is controlled according to the corrected temperature level. As a result, when the interlocked operation is in a stable state and only the floor heating operation is performed, the floor heating capacity of the floor heating terminal can be reliably controlled to an appropriate strength.

Further, according to claim 8, the correction value used in the interlocked operation is stored in the correction value storage means at an appropriate timing after the correction value is set until the interlocked operation ends. After that, when the interlocking operation is further started and the stable state is reached, the stored correction value is read out and used. As a result, it is possible to reliably use the actual value of the correction value during the past interlocked operation, so that the same appropriate floor heating capacity as during the past interlocked operation can be easily and reliably achieved.

1 is a circuit configuration diagram of an entire air conditioning system according to an embodiment of the present invention; FIG. Appearance of floor heating remote control Functional configuration diagram of the outdoor unit control unit Functional configuration diagram of the indoor unit control unit Diagram explaining the operation during floor heating operation Diagram explaining operation during warm air heating operation Diagram showing screen transitions up to setting interlocking operation on the air conditioner/floor heating interlock setting screen on the floor heating remote controller Diagram explaining the operation during interlocking operation A table showing the correlation between the temperature divisions of the air conditioner set temperature and the temperature level of the hot water supply to the floor heating terminal corresponding to each division, and the correlation between the temperature levels and the target return temperature. A diagram showing a specific example of an operation sequence when interlocking operation is performed Flowchart diagram showing the control procedure executed by the outdoor unit control unit and the indoor unit control unit during interlocking operation Flowchart diagram showing the control procedure executed by the outdoor unit control unit and the indoor unit control unit during interlocking operation

An embodiment of the present invention will be described below with reference to FIGS. 1 to 12. FIG.

FIG. 1 shows the circuit configuration of the entire air conditioning system 1 of this embodiment. As shown in FIG. 1 , the air conditioning system 1 has an outdoor unit 4 as a heat source of the air conditioning system 1 , an indoor unit 17 and a floor heating terminal 27 . In this embodiment, the floor heating terminal 27 is laid on the floor of the same room as the room in which the indoor unit 17 is installed, and the indoor unit 17 and the floor heating terminal 27 are installed in the same room (air-conditioned space). It is attached.

<Heating circulation circuit>
The outdoor unit 4 has a refrigerant-side passage 7b (corresponding to a refrigerant passage) and a water-side passage 7a (corresponding to a water passage) for circulating the refrigerant. A water-refrigerant heat exchanger 7 functioning as a condenser that exchanges heat with hot water, and a circulation pump 34 with a variable rotational speed. That is, the water-side flow path 7a of the water-refrigerant heat exchanger 7 and the floor heating terminal 27 are connected to a forward pipe 28 (corresponding to a forward pipe) and a return pipe 29 (corresponding to a return pipe) as hot water pipes. , forming a heating circulation circuit 33 as a hot water circulation circuit.

One outgoing header 30 is provided in the middle of the outgoing pipe 28 extending from the water-refrigerant heat exchanger 7 toward the floor heating terminal 27 . A portion of the feed pipe 28 upstream of the feed header 30 is configured as one common feed pipe 28a, and is heated by the water-refrigerant heat exchanger 7. good, and so on) is supplied. A portion of the feed pipe 28 on the downstream side of the feed header 30 branches into a plurality of (four in the illustrated example) individual feed pipes 28b. A thermal valve 31, which is an on-off valve, is attached to each of the branched individual feed pipes 28b.

One return header 32 is provided in the middle of the return pipe 29 extending from the floor heating terminal 27 toward the water-refrigerant heat exchanger 7 in the same manner as the feed pipe 28 . A more upstream portion branches into a plurality of (here, four) individual return pipes 29b. A portion of the return pipe 29 downstream from the return header 32 is configured as one common return pipe 29a, and the hot water introduced through the individual return pipe 29b is returned to the water-refrigerant heat exchanger 7.

In addition, in this embodiment, in order to simplify the explanation, an example in which one floor heating terminal 27 is connected is shown. may be connected (that is, four units may be connected).

The circulation pump 34 is provided in the middle of the common return pipe 29a, and circulates hot water from the return pipe 29 to the outgoing pipe 28 through the water-side flow path 7a, while supplying hot water from the floor heating terminal 27. Circulate. A cistern 35 that stores hot water and adjusts the pressure of the heating circulation circuit 33 is provided upstream of the circulation pump 34 in the common return pipe 29a. Each of the individual return pipes 29b of the return pipe 29 is provided with an incoming water temperature sensor 123 for detecting an incoming water temperature T1 as a return temperature of hot water flowing into the water-side passage 7a of the water-refrigerant heat exchanger 7. (corresponding to return temperature detection means) is provided.

<Refrigerant circulation circuit>
On the other hand, from the outdoor unit 4 to the indoor unit 17, a refrigerant circulation circuit 130 capable of heating hot water in the floor heating terminal 27 by heat exchange in the water-refrigerant heat exchanger 7 (details will be described later) is provided. The refrigerant circulation circuit 130 includes a main heat pump circuit section 130A, a floor warming side heat pump circuit section 130B, and an air conditioning side heat pump circuit section 130C.

<Main heat pump circuit>
The main heat pump circuit unit 130A includes a refrigerant pipe 11 that serves as a flow path for the refrigerant, a compressor 5 that compresses the refrigerant, a four-way valve 6, and a condenser or an evaporator through heat exchange between the refrigerant and the outside air. An air heat exchanger 10 as an outdoor heat exchanger that selectively functions as a container is connected by the refrigerant pipe 11 . The air heat exchanger 10 is, for example, a fin-tube type heat exchanger, and is provided with an outdoor fan 9 for passing outside air through the air heat exchanger 10 .

Specifically, the refrigerant pipe 11 is connected to a pipe portion 11a on the discharge side of the compressor 5 and to the pipe portion 11a through the four-way valve 6 during floor heating operation (see FIG. 5, etc., which will be described later). and a piping portion 11b.

In addition, the refrigerant pipe 11 includes a pipe portion 11c on the suction side of the compressor 5 and a compressor 5 side of the air heat exchanger 10 (in other words, the floor) during floor heating operation (see FIG. 5 described later). The outlet side at the time of heating operation, etc. (refer to FIG. 5 etc. described later) is connected to the piping portion 11c via the four-way valve 6, and the side opposite to the compressor 5 of the air heat exchanger 10 ( In other words, it includes a pipe portion 11e connected to the inlet side during the floor heating operation, etc. (see FIG. 5, etc., which will be described later).

The four-way valve 6 is a valve having four ports, and of the refrigerant pipe 11, each of the two ports for the pipe portions 11b and 11d (constituting the refrigerant main path) is connected to the remaining pipe portions. It switches which of the two ports for 11a and 11c should be connected. The two ports for the piping portions 11a and 11c are connected to each other by a refrigerant subpath composed of the piping portions 11a and 11c arranged in a loop, and the compressor 5 is provided on this refrigerant subpath. ing. For example, when the four-way valve 6 is switched to the state shown in FIG. communicate. On the other hand, when the cool air cooling operation described later is executed, the pipe portion 11a is communicated with the pipe portion 11d on the air heat exchanger 10 side.

<Floor warming side heat pump circuit>
The floor warm side heat pump circuit section 130B includes a refrigerant pipe 125 serving as a flow path for the refrigerant. there is

Specifically, the refrigerant pipe 125 is branched and connected from the pipe portion 11b, and the side opposite to the pipe portion 11b is the inlet side of the water-refrigerant heat exchanger 7 (specifically, the flow path 7b on the refrigerant side). and a piping portion 125c connected to the outlet side of the water-refrigerant heat exchanger 7 (more specifically, the flow path 7b on the refrigerant side). The piping portion 125c has an expansion valve 8 with a full-close function, and communicates with the piping portion 11e on the downstream side of the expansion valve 8. As shown in FIG.

<Air conditioning side heat pump circuit>
The air-conditioning-side heat pump circuit unit 130C includes a refrigerant pipe 126 that serves as a flow path for the refrigerant, and an indoor heat exchanger 14 that selectively functions as a condenser or an evaporator by heat exchange between the refrigerant and indoor air. is connected to the refrigerant pipe 126 . The indoor heat exchanger 14 is provided with an indoor fan 18 for passing indoor air through the indoor heat exchanger 14 . The indoor air sent by the operation of the indoor fan 18 is heat-exchanged in the indoor heat exchanger 14, and the air heated or cooled by the heat exchange is supplied indoors.

In the air-conditioning-side heat pump circuit portion 130C, more specifically, the refrigerant pipe 126 is branched and connected from the pipe portion 11b, similarly to the pipe portion 125b. Similar to the piping portion 126a and the piping portion 125c connected to the inlet side (see FIG. 6, which will be described later) during hot air heating operation, one side communicates with the piping portion 11e, and the other side of the piping portion 11e communicates with the piping portion 11e. and a pipe portion 126b connected to the outlet side (see FIG. 6 and the like described later) of the indoor heat exchanger 14 during warm air heating operation and the like. The piping portion 126a includes a two-way valve 16 capable of opening and closing communication between the piping portion 11b and the indoor heat exchanger 14, and the piping portion 126b includes an expansion valve 15 with a fully closed function. I have. The two-way valve 16 allows the flow of the refrigerant circulating in the air-conditioning-side heat pump circuit section 130C by opening it, and cuts it off by closing it.

The compressor 5, the four-way valve 6, the air heat exchanger 10, the outdoor fan 9, the two-way valve 16, the expansion valves 8 and 15, the water-refrigerant heat exchanger 7, etc. are provided in the outdoor unit 4. (see dashed line in Fig. 1).

<Refrigerant, various detection signals, etc.>
Arbitrary refrigerants such as HFC refrigerants and carbon dioxide refrigerants are used as refrigerants in the refrigerant circulation circuit 130 to form a heat pump cycle. In the refrigerant pipe 11 of the main heat pump circuit portion 130A, a discharge temperature sensor 120 for detecting a refrigerant discharge temperature Tout discharged from the compressor 5 is provided in the pipe portion 11a. The detection result of this sensor 120 is input to the outdoor unit control section 44 provided in the outdoor unit 4 . The outdoor unit control unit 44 is mainly composed of a microcomputer having a CPU, ROM, RAM, etc., and receives signals from various sensors in the outdoor unit 4, the indoor unit control unit 20, the floor heating remote control 36, etc., as will be described later. and controls the operation of the air conditioning system 1 .

Regarding the refrigerant pipe 126 of the air conditioning side heat pump circuit section 130C, the indoor heat exchanger 14 is provided with an indoor temperature sensor 19 (a room temperature detecting means) for detecting the indoor temperature Tr (corresponding to the actual room temperature) of the space to be air-conditioned. equivalent) is provided. The detection result of the sensor 19 is input to the indoor unit control section 20 provided in the indoor unit 17, and further appropriately input to the outdoor unit control section 44 provided in the outdoor unit 4 (indoor unit control section 20 or directly from sensor 19).

The outdoor unit control unit 44 of the outdoor unit 4 and the indoor unit control unit 20 of the indoor unit 17 are connected so as to be able to communicate with each other, and cooperate with each other based on the detection results of the sensors. while controlling the operation of each device/actuator in the outdoor unit 4 . In particular, by controlling the opening/closing operations and degrees of opening of the four-way valve 6, the two-way valve 16, and the expansion valves 8 and 15, and switching the flow path of the refrigerant, the floor heating terminal 27 controls the air-conditioned space. A floor heating operation that heats the floor surface, a warm air heating operation that heats the indoor air in the air-conditioned space by the indoor unit 17, and an interlocking operation ( (details will be described later), a cold-air cooling operation in which the indoor unit 17 cools the indoor air in the air-conditioned space, and the like can be selectively executed.

<Indoor unit remote control>
Here, the indoor unit 17 can be operated by an indoor unit remote controller 21 (corresponding to a first remote controller) configured as a wireless remote controller in this example. That is, the transmitter (not shown) of the indoor unit remote controller 21 and the receiver (not shown) of the indoor unit controller 20 communicate wirelessly using infrared rays or the like, and the transmitter of the indoor unit remote controller 21 transmits the signal to the indoor unit. Information is transmitted by one-way communication to the receiving section of the control section 20 . When the signal transmitted from the transmitter of the indoor unit remote controller 21 is received by the receiver of the indoor unit controller 20, the indoor unit controller 20 reads the information sent from the indoor unit remote controller 21 and performs the instructed control. I do. The indoor unit control unit 20 can exchange control signals S11 with the outdoor unit control unit 44 to transmit information by two-way communication. Information corresponding to the control signal S1 transmitted from is also obtainable via the indoor unit controller 20 .

The indoor unit remote controller 21 has a heating switch 22 that causes the indoor unit 17 to perform the warm air heating operation that supplies warm air to the room, and a cold air cooling operation that supplies cool air to the indoor unit 17. A cooling switch 23 that executes a cooling switch 23, a stop switch 24 that stops the hot air heating operation or the cold air cooling operation, and a setting for setting the indoor temperature during the hot air heating operation or the cold air cooling operation, that is, setting the air conditioner set temperature Tcon An indoor temperature setting switch 25 as means, a display section 26 for displaying the air conditioner set temperature Tcon and various operating states, and a timer switch 45 for instructing the indoor unit 17 to operate by a timer are provided.

When the heating switch 22 is operated to perform warm air heating operation, or when the cooling switch 23 is operated to perform cold air cooling operation, the display unit 26 displays the air conditioner set temperature Tcon and the operating state. etc. are displayed. Further, when the stop switch 24 is operated to stop the warm air heating operation or the cold air cooling operation, the display regarding the air conditioner set temperature Tcon and the operating state on the display section 26 disappears and becomes a non-display state.

<Floor heating remote control>
Further, the floor heating terminal 27 can be operated by a floor heating remote controller 36 (corresponding to a second remote controller) attached to the wall surface of the room as a wired remote controller in this example. The floor heating remote controller 36 exchanges a control signal S2 with the outdoor unit controller 44, and can transmit information by two-way communication. Thereby, the floor heating remote controller 36 can acquire operation information of the indoor unit 17 (eg, whether the indoor unit 17 is operating or not).

<Details of the floor heating remote controller>
As shown in FIG. 2, the floor heating remote controller 36 includes a display unit 37, a start/stop switch 38 for instructing the operation start/stop of the floor heating terminal 27, and instructs the floor heating terminal 27 to operate by a timer. a timer switch 39 for switching on, an operation switch 40 for instructing switching of the operation mode (normal mode, save mode, etc.) of the floor heating terminal 27, and a return switch 41 for returning the screen display to the previous screen. , a menu/decision switch 42, and a cross key 43 for up, down, left, and right directions. Although not shown, the floor heating remote controller 36 incorporates a CPU and a memory as storage means for controlling the operation of the floor heating terminal 27 and various displays.

The display unit 37 can switchably display a plurality of setting screens (screens 100 to 101 to be described later) under the control of the CPU. That is, in the example shown in FIG. 2( a ), the display unit 37 displays an overall setting screen 100 for setting the entire air conditioning system 1 . Further, in the example shown in FIG. 2B, the display unit 37 displays a terminal setting screen for performing settings related to the floor heating terminal 27, including operation start/stop setting of the floor heating terminal 27 provided in the room. 101 is displayed.

At this time, a tab TM written as "main" for selecting the overall setting screen 100 is provided so as to protrude upward near the right end of the upper portion of each of the setting screens 100 to 101 displayed on the display unit 37. ing. Further, a tab TA marked with "A" for selecting the terminal setting screen 101 is provided at the upper left end of the setting screens 100 to 101 of each setting screen 100 to 101 . By operating either tab TM or TA via the cross key 43 or the like, setting screens 100 to 101 having the operated tab TM or TA can be displayed.

<Overview of functions of outdoor unit control unit and indoor unit control unit>
Although detailed illustration is omitted, the outdoor unit control unit 44 and the indoor unit control unit 20 each include a storage unit that stores various data and programs, and a control unit that performs arithmetic and control processing. .

A functional configuration of the outdoor unit control section 44 is shown in FIG. As shown in FIG. 3, the outdoor unit control unit 44 includes a four-way valve control unit 44A that controls the four-way valve 6, and a compressor control unit 44B as compressor control means that controls the rotation speed of the compressor 5. , an expansion valve control unit 44C that controls the opening degrees of the expansion valves 8 and 15, a pump control unit 44D that controls the rotation speed of the circulation pump 34, a floor heating level setting unit 44E, and the two-way valve 16 and a two-way valve control unit 44F for controlling the opening and closing of the valve. The details of the control and processing contents of each functional unit will be described later.

FIG. 4 shows the functional configuration of the indoor unit control section 20. As shown in FIG. As shown in FIG. 4 , the indoor unit control section 20 mainly has a function of controlling the rotation speed of the indoor fan 18 . The details of the control/processing contents will be described later.

As described above, the air conditioning system 1 of the present embodiment selectively executes various operations such as floor heating operation, warm air heating operation, cold air cooling operation, interlocking operation between floor heating operation and warm air heating operation. can be done. Details of each operation will be described below.

<Floor heating operation>
First, the floor heating operation will be described with reference to FIG. During the floor heating operation shown in FIG. 5, the four-way valve control section 44A causes the four-way valve 6 to communicate the piping section 11a with the piping section 11b and to communicate the piping section 11c with the piping section 11d. can be switched to the position where Further, the two-way valve 16 is switched to the closed state by the two-way valve control section 44F. Further, the expansion valve control section 44C controls the expansion valve 8 to be in the open state and the expansion valve 15 to be in the fully closed state.

As a result, the piping portion 11a on the discharge side of the compressor 5→the piping portion 11b→the piping portion 125b→the flow path 7b on the refrigerant side of the water-refrigerant heat exchanger 7→the piping portion 125c (expansion valve 8)→the piping portion 11e→air A refrigerant path of heat exchanger 10→pipe portion 11d→pipe portion 11c on the suction side of compressor 5 is formed. As a result, in the water-refrigerant heat exchanger 7 functioning as a condenser, the water flowing through the flow path 7a is heated by heat from the refrigerant flowing through the flow path 7b, and high-temperature water (heated water) is supplied into the floor heating terminal 27. and heats the floor surface of the air-conditioned space.

<Warm air heating operation>
Next, the warm air heating operation will be described with reference to FIG. During the warm air heating operation shown in FIG. 6, the four-way valve control unit 44A switches the four-way valve 6 to the same side as the floor heating operation. Further, the two-way valve 16 is switched to the open state by the two-way valve control section 44F. Further, the expansion valve control section 44C controls the expansion valve 8 to be fully closed and the expansion valve 15 to be open.

As a result, the piping portion 11a on the discharge side of the compressor 5→the piping portion 11b→the piping portion 126a→the indoor heat exchanger 14 of the indoor unit 17→the piping portion 126b (expansion valve 15)→the piping portion 11e→the air heat exchanger 10 →piping portion 11d→a refrigerant path of the piping portion 11c on the intake side of the compressor 5 is formed. As a result, the refrigerant exchanges heat with the indoor air in the indoor heat exchanger 14 that functions as a condenser, releases heat, and heats the air in the air-conditioned space.

<Setting whether interlocking operation can be executed by remote controller>
As described above, in this embodiment, the interlocking operation in which the hot air heating operation by the indoor unit 17 and the floor heating operation by the floor heating terminal 27 are interlocked with each other can be executed. It is possible to set whether or not to perform the interlocking operation by .

In this case, the main menu shown in FIG. A screen 102 is displayed. The main menu screen 102 includes a "timer setting" button, a "power saving setting" button, a "power consumption" button, an "option menu" button, and the like. As shown in the figure, when the "option menu" button is selected by operating the cross key 43 and the menu/decision switch 42 is pressed, the display unit 37 displays the option menu shown in FIG. Move to screen 103 .

The option menu screen 103 shown in FIG. 7B includes a "date and time setting" button, a "display setting" button, an "air conditioner/floor heating interlock" button, a "turn off time setting" button, and the like. As shown in the figure, when the menu/decision switch 42 is pressed while the "air conditioner/floor heating interlocking" button is selected by operating the cross key 43, the display unit 37 displays the screen shown in FIG. 7(c). 104 to the air conditioner/floor heating interlock setting screen 104 shown.

The air conditioner/floor heating interlock setting screen 104 shown in FIG. 7(c) is provided with an "interlock ON" button and an "interlock OFF" button. By pressing the determination switch 42, execution or non-execution of the interlocked operation is determined. The illustrated example shows a state in which the menu/decision switch 42 is pressed while the "interlocked ON" button is selected, and execution of the interlocked operation is confirmed. When the floor heating remote controller 36 is operated to confirm execution of the interlocked operation, the interlocked operation is started by pressing the heating switch 22 of the indoor unit remote controller 21 . That is, in a state in which execution of the interlocked operation has been confirmed, the indoor unit remote controller 21 can be used to start the operation of the indoor unit 17 and also to start the operation of the floor heating terminal 27 . When execution of the interlocked operation is set, only the indoor unit remote controller 21 can start the interlocked operation, and the floor heating remote controller 36 cannot start the interlocked operation. Note that the execution/non-execution of the interlocking operation may be set by the indoor unit remote controller 21 instead of the floor heating remote controller 36 . In that case, for example, an interlocking operation switch may be provided on the indoor unit remote controller 21 so that "setting of execution of the interlocking operation" and "starting of interlocking operation" can be performed by one operation of the interlocking operation switch.

<Interlocking operation>
The interlocking operation executed as described above (in detail, however, it is the state of "start-up operation 2" described later) will be described with reference to FIG. Even during this interlocking operation, the four-way valve control unit 44A switches the four-way valve 6 to the same side as in the floor heating operation. Further, the two-way valve 16 is switched to the open state by the two-way valve control section 44F. Further, the expansion valve control section 44C controls the expansion valves 8 and 15 to be in an open state (in detail, discharge control is performed, which will be described later).

As a result, the refrigerant path is divided into two via the piping portion 11a on the discharge side of the compressor 5→the piping portion 11b. It reaches the piping section 11e via the section 125c (expansion valve 8), and the other joins the piping section 11e via the piping section 126a→the indoor heat exchanger 14→the piping section 126b (expansion valve 15). The subsequent route is the piping portion 11e→the air heat exchanger 10→the piping portion 11d→the piping portion 11c on the intake side of the compressor 5. FIG.

As a result, the floor heating operation of the floor heating terminal 27 by heating the water in the flow path 7a in the water-refrigerant heat exchanger 7 and the warm air heating operation of the indoor unit 17 by releasing heat from the indoor heat exchanger 14 are performed in parallel. is executed as

<Issues when the user adjusts the heating>
When the warm air heating operation by the indoor unit 17 and the floor heating operation by the floor heating terminal 27 are interlocked as described above, the heating capacity may be adjusted by the user. At that time, as in the prior art, the user sets the temperature level of the hot water supplied to the floor heating terminal 27 using the floor heating remote controller 36, for example, so that the room temperature corresponds to the temperature level. A method of automatically controlling the warm air heating capacity of the indoor unit 17 is also conceivable.

However, what the user usually wants to adjust is the room temperature of the air-conditioned space realized by the warm air heating of the indoor unit 17 . In the method similar to that of the prior art, the user does not know how many times the temperature level set by the user corresponds to the room temperature, and it is difficult to intuitively adjust the temperature. Therefore, it is difficult for the user to obtain the desired heating feeling.

<Outline of the method of the present embodiment>
Therefore, in the present embodiment, contrary to the above, the user sets the air conditioner set temperature Tcon in the indoor unit 17 by using the indoor unit remote control 21 during interlocked operation, so that the set air conditioner set temperature Tcon can be handled. The floor heating terminal 27 is controlled so that the floor heating capacity is set to .

<Details of the outdoor unit controller>
Details of functions provided in the outdoor unit control section 44 for realizing the method of the present embodiment will be described with reference to FIG. As described above, the outdoor unit control unit 44 includes a four-way valve control unit 44A, a compressor control unit 44B, an expansion valve control unit 44C, a pump control unit 44D, a floor heating level setting unit 44E, a two-way valve and a control unit 44F.

<Four-way valve controller>
The four-way valve control unit 44A stores operation information corresponding to operation instructions from the indoor unit remote controller 21 via the indoor unit control unit 20 (any of hot air heating operation, cold air cooling operation, interlocked operation, etc.). The control signal S11 for instructing the operation start and operation stop) and the operation instruction from the floor heating remote control 36 (the control signal S2 for instructing the operation start and operation stop of the floor heating operation) are input. The four-way valve control unit 44A determines in what operation mode (floor heating operation, cold air cooling operation, warm air heating operation, interlocked operation, etc.) the air conditioning system 1 is actually operated in accordance with the operation information and operation instructions. is determined and the corresponding operating information is output to the compressor control unit 44B, the expansion valve control unit 44C, the pump control unit 44D, the two-way valve control unit 44F, and the floor heating level setting unit 44E, and to the indoor unit control unit 20 is also output as the control signal S11. The four-way valve control unit 44A also outputs a control signal corresponding to the determined operating mode to the four-way valve 6 to switch the four-way valve 6. FIG.

<Floor heating level setting section>
The floor heating level setting unit 44E stores the indoor temperature Tr detected by the indoor temperature sensor 19 and the air conditioner set temperature Tcon set by the indoor unit remote controller 21 via the indoor unit controller 20. , is input (in addition to direct input, the above-mentioned indirect input is also included. The same applies hereinafter). The floor heating level setting unit 44E includes a correlation storage unit 44E1 (corresponding to correlation storage means), a temperature level determination unit 44E2 (corresponding to temperature level determination means), a correction value storage unit 44E3, a temperature level correction unit 44E4, and a target return temperature determination unit 44E5 (corresponding to target return temperature determination means), and during interlocked operation, according to the input indoor temperature Tr and air conditioner set temperature Tcon, from the floor heating terminal 27 to the A target return temperature Ta of hot water flowing into the water-side flow path 7a of the water-refrigerant heat exchanger 7 is determined.

That is, first, in the correlation storage unit 44E1, as shown in FIG. 9A, a plurality of temperature categories of the set value (set room temperature) of the air conditioner set temperature Tcon by the indoor unit remote control 21 and corresponding to each temperature category The temperature level of the hot water to the floor heating terminal 27 and the correlation are stored. In this example, when the air conditioner set temperature Tcon is 28° C. or higher and 30° C. or lower, the temperature level is 9, and when the air conditioner set temperature Tcon is 26° C. or higher and lower than 28° C. If the temperature level is 8, and the air conditioner set temperature Tcon is 25°C or more and less than 26°C (in the illustration, it is written as "25" for convenience; the same applies hereinafter), the temperature level is 7, and the air conditioner set temperature Tcon is 24°C or more and 25°C. If less than, the temperature level is 6, if the air conditioner set temperature Tcon is 23°C or more and less than 24°C, the temperature level is 5, if the air conditioner set temperature Tcon is 22°C or more and less than 23°C, the temperature level is 4, and the air conditioner set temperature When Tcon is 21°C or more and less than 22°C, the temperature level is 3. When the air conditioner set temperature Tcon is 20°C or more and less than 21°C, the temperature level is 2. When the air conditioner set temperature Tcon is 17°C or more and less than 20°C, the temperature. The level is set in advance such as 1.

The correlation storage unit 44E1 also stores the correlation between the temperature level to the floor heating terminal 27 and the target return temperature Ta as shown in FIG. 9(b). In this example, the target return temperature Ta is 45° C. when the temperature level is 9, the target return temperature Ta is 43° C. when the temperature level is 8, and the target return temperature Ta is 7 when the temperature level is 7. When Ta is 41° C. and the temperature level is 6, the target return temperature Ta is 39° C. When the temperature level is 5, the target return temperature Ta is 38° C. When the temperature level is 4, the target return temperature Ta is 38° C. When the temperature Ta is 36° C. and the temperature level is 3, the target return temperature Ta is 35° C. When the temperature level is 2, the target return temperature Ta is 34° C. When the temperature level is 1, the target return temperature Ta The return temperature Ta is predetermined, such as 32°C.

The temperature level determination unit 44E2 determines the corresponding temperature level Ls by applying the correlation shown in FIG. 9A to the air conditioner set temperature Tcon input as described above. The determination of this temperature level Ls is performed, for example, at the start of the interlocked operation. Further, as shown in FIG. 7(d), the value of the air conditioner set temperature Tcon at this time (20° C. in this example) and the value of the corresponding temperature level Ls ( In this example, level 2) may be displayed. As for the value of the temperature level Ls, the value after correction described later may be displayed.

In this embodiment, the floor heating capacity of the floor heating terminal 27 is controlled based on the temperature level Ls thus determined. At that time, for example, the thermal insulation and airtight structure around the air-conditioned space, the floor structure, the type of mat around the floor heating terminal 27, the floor heating installation rate, etc. The temperature level correction unit 44E4 corrects the temperature level Ls in order to reflect such preferences.

That is, the temperature level correction unit 44E4 sets Ls+α obtained by adding an appropriate correction value α to the temperature level Ls as the corrected temperature level Ls. In the present embodiment, the value of this correction value α is made variable according to the difference between the air conditioner set temperature Tcon and the room temperature Tr according to the conditions of the air-conditioned space that fluctuate from moment to moment (details are later).

Then, the target return temperature determining unit 44E5 applies the correlation shown in FIG. Determine the return temperature Ta. If correction is not required, the target return temperature determination unit 44E5 determines the target return temperature Ta using the temperature level Ls determined by the correlation shown in FIG. 9(a). In the case of start-up operation 1, start-up operation 2, and start-up operation 3, which will be described later, substantially no correction is performed (in other words, the correction value α is set to 0), and is determined by the correlation shown in FIG. 9(a). The target return temperature Ta is determined using the obtained temperature level Ls. The target return temperature Ta thus determined is output to the compressor control section 44B. Note that the correction value storage unit 44E3 will be described later.

The compressor control unit 44B receives the indoor temperature Tr from the indoor temperature sensor 19, the air conditioner set temperature Tcon set by the indoor unit remote control 21, and the input detected by the incoming water temperature sensor 123. The water temperature T1 and the target return temperature Ta determined by the target return temperature determining section 44E5 are input. The compressor control unit 44B includes a floor heating target rotation speed determination unit 44B1 that determines a target rotation speed corresponding to the floor heating capability of the floor heating terminal 27, and a target rotation speed corresponding to the warm air heating capability of the indoor unit 17. and an air conditioner target rotation speed determination unit 44B2 for determination.

The floor heating target rotation speed determining section 44B1 determines whether the incoming water temperature T1 from the incoming water temperature sensor 123 is the target return temperature Ta input by the target return temperature determining section 44E5 of the floor heating level setting section 44E. (in other words, the difference between T1 and Ta becomes 0). The air conditioner target rotation speed determination unit 44B2 sets the target rotation speed of the compressor 5 so that the indoor temperature Tr becomes the air conditioner set temperature Tcon (in other words, the difference between Tr and Tcon becomes 0). decide.

The compressor control unit 44B uses the floor warming target rotation speed determination unit 44B1 based on the operation information input from the four-way valve control unit 44A as described above, the air conditioner set temperature Tcon, and the indoor temperature Tr. One of the determined target rotation speed and the target rotation speed determined by the air conditioner target rotation speed determination unit 44B2 is determined as the final rotation speed Nc (control value) of the compressor 5, It outputs to the compressor 5 (details will be described later).

The refrigerant discharge temperature Tout detected by the discharge temperature sensor 120 is input to the expansion valve control section 44C. The expansion valve control unit 44C feedback-controls the opening degrees of the expansion valves 8 and 15 so that the refrigerant discharge temperature Tout becomes a predetermined constant value according to the operation information from the four-way valve control unit 44A ( so-called discharge control). In this example, the expansion valves 8 and 15 are controlled by the expansion valve control section 44C so as to have the same degree of opening. That is, when the refrigerant discharge temperature Tout is too low, the expansion valve control unit 44C controls the expansion valves 8 and 15 so as to close their openings. Control the opening in the opening direction.

The indoor temperature Tr from the indoor temperature sensor 19 and the air conditioner set temperature Tcon set by the indoor unit remote controller 21 are input to the pump control section 44D. The pump control unit 44D determines the target rotation speed Np of the circulation pump 34 according to the operation information from the four-way valve control unit 44A, and uses this to control the rotation speed of the circulation pump 34 (details control contents will be described later).

The indoor temperature Tr from the indoor temperature sensor 19 and the air conditioner set temperature Tcon set by the indoor unit remote control 21 are input to the two-way valve control section 44F. The two-way valve control section 44F controls the opening/closing operation of the two-way valve 16 according to the operation information from the four-way valve control section 44A (details of control will be described later).

The determination of the operation mode and the generation of operation information by the four-way valve control unit 44A may be performed by the indoor unit control unit 20. In this case, the operation information corresponding to the determined operation mode is input from the indoor unit control unit 20 to the outdoor unit control unit 44, and the four-way valve control unit 44A and the compressor control are performed according to the input operation information. A section 44B, an expansion valve control section 44C, a pump control section 44D, a floor heating level setting section 44E, and a two-way valve control section 44F perform various controls.

<Details of the indoor unit controller>
As shown in FIG. 4, the indoor unit control unit 20 stores operation information (operation start and operation stop of the floor heating operation) corresponding to operation instructions from the floor heating remote controller 36 via the outdoor unit control unit 44. and the operation instruction from the indoor unit remote controller 21 (the control signal S1 for instructing the start and stop of any one of hot air heating operation, cold air cooling operation, interlocked operation, etc.) , the indoor temperature Tr detected by the indoor temperature sensor 19 and the air conditioner set temperature Tcon set by the indoor unit remote controller 21 are input. The indoor unit control unit 20 accordingly outputs the air conditioner set temperature Tcon and the indoor temperature Tr to the outdoor unit control unit 44, and outputs the operating information corresponding to the control signal S1 as the control signal S11 to the outdoor unit. output to the machine control unit 44. Further, the indoor unit control unit 20 outputs to the indoor fan 18 a drive control signal corresponding to the target rotation speed N1 corresponding to the indoor temperature Tr and the air conditioner set temperature Tcon, thereby increasing the rotation speed of the indoor fan 18. control (details of control will be described later).

<Specific example of operation sequence during interlocking operation>
FIG. 10 shows a specific example of an operation sequence when the air conditioning system 1 is actually started from a stopped state and the interlocked operation is performed.

10, in this example, the air conditioning system 1 is in a stopped state at time t0, the indoor temperature Tr detected by the indoor temperature sensor 19 is 6° C., and the compressor 5 and the circulation pump 34 are stopped. in a state. Both the expansion valves 8 and 15 are fully open, and the two-way valve 16 is fully closed.

After that, at time t1, when an instruction to start interlocking operation is given by operating the floor heating remote controller 36 and the indoor unit remote controller 21 as described above, the compressor 5 is activated and started to operate under the control of the compressor controller 44B. . In the illustrated example, the air conditioner set temperature Tcon is set to 20.degree. The rotation speed of the compressor 5 at this time is the target rotation speed ("AC instruction ”). The expansion valve control unit 44C controls the expansion valve 8 to a predetermined small opening degree close to the closed state, while controlling the opening degree of the expansion valve 15 to a predetermined initial opening degree. Controlled by control. The two-way valve 16 is controlled to be open by the two-way valve control section 44F. The circulation pump 34 is stopped by the pump control section 44D. As a result, in substantially the same manner as shown in FIG. 6, the floor heating operation by the floor heating terminal 27 is not performed, and the hot air heating operation by the indoor unit 17 is performed alone (the start-up operation corresponding to the first stage). 1).

The air-conditioned space is heated by the warm air heating independent operation from time t1, and the indoor temperature Tr rises. At time t2, the difference between the air conditioner set temperature Tcon and the indoor temperature Tr becomes 8° C. room temperature Tr=12° C.), the start-up operation 1 shifts to the start-up operation 2 (corresponding to the second stage). That is, the opening degree of the expansion valve 8 is controlled to a predetermined initial opening degree by the expansion valve control section 44C, and then controlled by the aforementioned discharge control. After being controlled once, it is controlled by ejection control. Further, while the two-way valve 16 is continuously controlled to be open, the circulation pump 34 is driven at the maximum rotational speed (eg, 4000 rpm) by the pump control section 44D. The rotation speed of the compressor 5 at this time is the target rotation speed determined by the air conditioner target rotation speed determination unit 44B2 of the compressor control unit 44B and the target rotation speed determined by the floor warming target rotation speed determination unit 44B1 ("Floor abbreviated as "heating instruction"), whichever is greater is used for control. That is, the target rotation speed determined by the air conditioner target rotation speed determination unit 44B2 is the target rotation speed determined by the above method based on the difference between the room temperature Tr and the air conditioner set temperature Tcon, and the floor warming target rotation speed determination unit The target rotation speed according to 44B1 is determined by the above method according to the difference between the target return temperature Ta corresponding to the temperature level Ls determined based on the air conditioner set temperature Tcon and the incoming water temperature T1. is the target rotation speed. As a result, the floor heating operation by the floor heating terminal 27 and the warm air heating operation by the indoor unit 17 are performed in parallel, substantially in the same manner as shown in FIG.

The combined use of the floor heating operation and the warm air heating operation from time t2 heats the air-conditioned space, further increasing the indoor temperature Tr, and at time t3, the difference between the indoor temperature Tr and the air conditioner set temperature Tcon becomes 3. ° C. (in this example, the room temperature Tr=23° C.), the start-up operation 2 shifts to the start-up operation 3 . That is, subsequently, the opening degrees of the expansion valves 8 and 15 are controlled by discharge control, the two-way valve 16 is controlled to be open (without being closed), and the circulation pump 34 is driven at the maximum rotational speed. be. On the other hand, the rotational speed of the compressor 5 at this time is controlled using the target rotational speed determined by the floor warming target rotational speed determining section 44B1 by the above method. In particular, the indoor unit control unit 20 controls the rotational speed of the indoor fan 18 to a predetermined gentle breeze state (monitoring air blow). As a result, the floor heating operation by the floor heating terminal 27 and the slight warm air heating operation (warm air slight heating) by the indoor unit 17 are performed in parallel, and the current room temperature is maintained. However, as shown in the figure, the space to be air-conditioned is sufficiently warmed, the indoor fan 18 is almost stopped, and the indoor unit 17 hardly heats the room, so the indoor temperature Tr stops rising and drops slightly. begin to

After shifting to the start-up operation 3 at time t3 as described above, at time t4 after a predetermined elapsed time ΔT (Δt=10 minutes in this example), the start-up operation 3 transitions to stable operation. (3rd stage). That is, the opening degree of the expansion valve 8 is controlled to a predetermined initial opening degree by the expansion valve control section 44C, and then controlled by the aforementioned discharge control, and the opening degree of the expansion valve 15 is controlled to a fully closed state. . Further, the two-way valve 16 is controlled to be closed by the two-way valve control section 44F. Further, the rotation speed of the compressor 5 is continuously controlled using the target rotation speed determined by the above-described method by the floor warming target rotation speed determination unit 44B1, and the circulation pump 34 is driven at the maximum rotation speed. The number of revolutions of the indoor fan 18 is controlled to a predetermined breeze state. As a result, the warm air heating operation by the indoor unit 17 is stopped, and the floor heating by the floor heating terminal 27 is independently operated.

In this stable operation state, the temperature level Ls is corrected using the aforementioned variable correction value (see steps S85 and S95 in the flow of FIG. 12, which will be described later). That is, the correction value at this time is variably set according to the difference between the room temperature Tr and the air conditioner set temperature Tcon, which can change from moment to moment. As a result, the indoor temperature Tr, which had gradually decreased as described above, stops decreasing and becomes substantially the same as the air conditioner set temperature Tcon, and thereafter stabilizes at that temperature.

Although not shown, in the stable operation state, if the indoor temperature Tr drops for some reason and the difference between the air conditioner set temperature Tcon and the indoor temperature Tr reaches 3° C., the start-up operation described above is performed. 2 (see step S70 in FIG. 12 to be described later).

<Control procedure>
Control procedures executed by the outdoor unit control section 44 and the indoor unit control section 20 during the interlocked operation in order to realize the above method will be described with reference to flowcharts of FIGS. 11 and 12. FIG. In FIG. 11, when the interlocking operation is started as described above, first, in step S10, the start-up operation 1 is started, and the warm air heating by the indoor unit 17 is independently operated.

Thereafter, in step S15, it is determined whether or not the difference Tcon-Tr between the air conditioner set temperature Tcon set by the indoor unit remote controller 21 and the indoor temperature Tr detected by the indoor temperature sensor 19 is 8° C. or less. be done. If the temperature exceeds 8° C., the determination is not satisfied (S15: NO), it is considered that the air-conditioned space has not yet warmed up, and loop standby is continued, and the start-up operation 1 is continued. When the temperature reaches 8° C. or less (8° C. or a value smaller than 8° C.), the determination is satisfied (S15: YES), and it is assumed that the air-conditioned space has warmed to some extent, and the process proceeds to step S20.

In step S20, the start-up operation 2 is started, and the floor heating operation by the floor heating terminal 27 and the warm air heating operation by the indoor unit 17 are performed in parallel.

After that, in step S25, it is determined whether or not the Tcon-Tr is -3° C. or lower. If the temperature exceeds −3° C., the determination is not satisfied (S25: NO), it is assumed that the air-conditioned space has not yet warmed up sufficiently, and loop standby is continued, and the start-up operation 2 is continued. When the temperature becomes −3° C. or less (−3° C. or a value smaller than −3° C.), the determination is satisfied (S25: YES), and the process proceeds to step S30.

In step S30, the start-up operation 3 is started, and the floor heating operation by the floor heating terminal 27 and the slight heating operation by the indoor unit 17 (the indoor fan 18 is in a gentle state) are performed in parallel.

After that, in step S35, it is determined whether or not the predetermined time ΔT (Δt=10 minutes in this example) has elapsed after step S30. When 10 minutes have passed, this determination is satisfied (S35: YES), and the process proceeds to step S40.

In step S40, the stable operation is started, the warm air heating operation by the indoor unit 17 is stopped, and the floor heating terminal 27 is independently operated.

After that, in step S45, it is determined whether or not an instruction to end the interlocked operation has been given by the indoor unit remote controller 21 . If the termination instruction is issued, the determination is satisfied (S45: YES), and a predetermined termination process is performed to restore the state of the compressor 5 and the like to the initial state (the state at time t0), and the correction at this time. The value α is stored in the correction value storage section 44E3 (corresponding to correction value storage means) provided in the floor heating level setting section 44E of the outdoor unit control section 44, and this flow ends.

On the other hand, if the instruction to end the interlocked operation is not issued in step S45, the determination is not satisfied (S45: NO), and the process proceeds to step S55. In step S55, it is determined whether or not (the determination made in step S55) is the first determination after shifting to stable operation in step S40. This is the first determination, that is, when the air conditioning system 1 is started up as described above and then goes through startup operation 1→startup operation 2→startup operation 3, and the operation becomes stable first, the judgment is satisfied. (S55: YES), the correction value α stored in the correction value storage section 44E3 in step S50 in the previous operation of the air conditioning system 1 is read, and the process proceeds to step S65. It should be noted that the processing executed in step S60 functions as correction value obtaining means described in each claim. If the determination in step S55 is not the first determination, the determination is not satisfied (S55: NO), and the process proceeds directly to step S65.

At step S65, it is determined whether or not the Tcon-Tr exceeds 3°C. If the temperature exceeds 3° C., the determination is satisfied (S65: YES), it is assumed that the air-conditioned space has become cold for some reason, and the process proceeds to step S70, and the correction value α at this point is stored in the correction value storage unit 44E3. , the process returns to step S20 and shifts to the start-up operation 2. On the other hand, if Tcon-Tr is 3° C. or less in step S65, the determination is not satisfied (S65: NO), and the process proceeds to step S75.

In step S75, it is determined whether 30 minutes have elapsed since the transition from step S35 to step S40, that is, the transition to stable operation, or whether 30 minutes have elapsed since the previous determination (performed in step S75). , is determined. If 30 minutes have not elapsed since the transition to stable operation and 30 minutes have not elapsed since the previous determination, the determination is not satisfied (S75: NO), and the process returns to step S45 to repeat the same procedure. On the other hand, if 30 minutes have passed since the transition to stable operation or if 30 minutes have passed since the previous determination, the determination is satisfied (S75: YES), and the process proceeds to step S80.

In step S80, it is determined whether or not the Tcon-Tr exceeds 2°C. If it exceeds 2° C., the determination is satisfied (S80: YES), it is considered that the floor heating capacity is insufficient, and the process proceeds to step S85, where 1 is added to the correction value α at this time, Returning to step S45, the same procedure is repeated.

On the other hand, in step S80, if the Tcon-Tr is 2° C. or less, the determination is not satisfied (S80: NO), and the process proceeds to step S90. In step S90, it is determined whether or not the Tcon-Tr is less than -2°C. If it is less than -2°C (value smaller than -2), the determination is satisfied (S90: YES), the floor heating capacity is considered to be excessive, and the process proceeds to step S95, and the correction value at this time 1 is subtracted from the value of α, the process returns to step S45, and the same procedure is repeated. If it is -2° C. or more (-2 or greater) in step S90, the determination is not satisfied (S90: NO), and the floor heating capacity is generally considered to be appropriate without excess or deficiency, and the correction value Without increasing or decreasing α, the process returns to step S45 and repeats the same procedure.

As can be seen from the transition from step S75 to step S80, the increase/decrease adjustment of the correction value α in steps S85 and S90 based on the determinations in steps S80 and S90 is performed every 30 minutes. be.

<Effects of Embodiment>
As described above, according to the air conditioning system 1 of the present embodiment, the floor heating operation of the floor heating terminal 27 supplied with hot water and the warm air heating operation of the indoor unit 17 supplied with the refrigerant are interlocked. It can be performed. At that time, the user can adjust the strength of the heating using the indoor unit remote control 21 for operating the indoor unit 17 . That is, when the user sets the air conditioner set temperature Tcon with the indoor temperature setting switch 25 provided in the indoor unit remote controller 21, the temperature level determination unit 44E2 of the floor heating level setting unit 44E sets the air conditioner set temperature Tcon. The temperature level Ls of hot water to the floor heating terminal 27 is determined correspondingly. Then, the rotation speed of the compressor 5 is controlled by the compressor control section 44B in accordance with the determined hot water temperature level Ls. As a result, the floor heating capacity of the floor heating terminal 27 to which hot water heated by heat exchange with the refrigerant introduced from the compressor 5 is supplied is adjusted.

As described above, in the present embodiment, when the indoor unit 17 and the floor heating terminal 27 perform interlocking operation, the user can simply set the air conditioner set temperature Tcon for the indoor unit 17 using the indoor unit remote controller 21. , the floor heating capacity of the floor heating terminal 27 is automatically controlled to an appropriate strength corresponding to the setting of the air conditioner set temperature Tcon. As a result, compared to the conventional method in which the user sets the temperature level to the floor heating terminal and the warm air heating capacity of the indoor unit is automatically adjusted, the user can intuitively adjust the temperature, and the temperature can be adjusted as desired. You can feel the warmth.

Further, particularly in this embodiment, the correlation storage unit 44E1 stores a correlation between a plurality of predetermined temperature ranges regarding the air conditioner set temperature Tcon and the temperature level Ls corresponding to each temperature range. When the temperature level determination unit 44E2 determines the temperature level Ls, the temperature level Ls can be quickly and reliably determined by a simple calculation by referring to the correlation stored in advance in the correlation storage unit 44E1. can.

In this embodiment, the target return temperature Ta is determined according to the temperature level Ls corresponding to the air conditioner set temperature Tcon. is controlled to be the target return temperature Ta. As a result, the floor heating capacity of the floor heating terminal 27 can be reliably adjusted to the intensity corresponding to the user's air conditioner set temperature Tcon.

In addition, in the present embodiment, in particular, the thermal insulation and airtight structure around the air-conditioned space, the floor structure, the type of mat around the floor heating terminal 27, the floor heating installation rate, etc. The temperature level Ls is corrected by incorporating the user's preference as the correction value α. Then, the rotation speed of the compressor 5 is controlled using the corrected temperature level Ls. As a result, it is possible to obtain a favorable feeling of heating by performing finer adjustments. In this case, an upper limit and a lower limit may be set for the correction value α so that the value falls within a predetermined comfortable range.

Further, particularly in this embodiment, the correction value α is variably set according to the difference between the room temperature Tr detected by the room temperature sensor 19 and the air conditioner set temperature Tcon. As a result, the floor heating capacity can be flexibly and accurately adjusted according to the conditions of the air-conditioned space that change from moment to moment.

Further, particularly in the present embodiment, after the compressor 5 is started, if the space to be air-conditioned is not yet warmed up, the warm air heating operation is performed without performing the floor heating operation (startup operation 1), and then the indoor temperature Tr The floor heating operation and the warm air heating operation are performed in parallel according to the increase in the temperature (start-up operation 2). After that, when the room temperature Tr rises sufficiently and stabilizes, the warm air heating operation is stopped and only the floor heating operation is performed (stable operation). In this state, the temperature level Ls determined corresponding to the air conditioner set temperature Tcon is corrected, and the rotational speed of the compressor 5 is controlled according to the corrected temperature level Ls. As a result, when the interlocked operation is in a stable state and only the floor heating operation is performed, the floor heating capacity of the floor heating terminal 27 can be reliably controlled to an appropriate strength.

Further, particularly in this embodiment, the correction value α used during the interlocked operation is stored in the correction value storage unit 44E3 when the interlocked operation ends. After that, when the interlocking operation is further started and the stable state is reached, the stored correction value α is read out and used. As a result, the actual value of the correction value α during the past interlocked operation can be reliably used, so that the same appropriate floor heating capacity as during the past interlocked operation can be easily and reliably achieved. In this example, the correction value α is stored in the correction value storage unit 44E3 at the end of the interlocked operation, but the present invention is not limited to this. In short, it suffices if the correction value is stored in the correction value storage unit 44E3 at an appropriate timing after the correction value is set and until the interlocking operation ends.
In particular, when the correction value α is variably set as described above and the floor heating capacity is adjusted according to the situation of the air-conditioned space that changes from moment to moment, the correction value storage unit 44E3 as described above By repeating the memory of →reading and using at the next operation, a so-called learning function is provided, and the floor heating capacity can be optimized. As a result, comfort conditions can be reliably corrected for each room to be air-conditioned, for example, so that comfort can be more easily ensured. In addition, learning each time makes it possible to cope with seasonal fluctuations, so it is possible to cope with, for example, the coldness of the entire body during the intermediate seasons (spring, autumn) and winter, and to maintain comfort.

<Other Modifications>
It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible without changing the gist of the invention.

For example, in the above embodiment, the value of the correction value α is made variable according to the difference between the air conditioner set temperature Tcon and the room temperature Tr, but it is not limited to this. That is, the value of the correction value α may be fixedly set by the user's manual operation with the indoor unit remote controller 21 or the floor heating remote controller 36, for example. For example, in the case of a user who is more susceptible to cold than normal people, or a user who is sensitive to cold, etc., α can be set to 1 or 2, etc. On the contrary, in the case of a user who is more sensitive to heat than normal people, etc., α =-1 or -2, and so on. Note that, for example, in the case of this manual setting mode, the correction value α may be set to 0 as a default.

In this case, steps S75 to S95 in the flow of FIG. 12 are omitted, and if the determination in step S65 is not satisfied, the process directly returns to step S45. In this case, when the interlocked operation ends as described above (see step S50 in FIG. 12) or when the stable operation shifts to start-up operation 2 (see step S70 in FIG. 12), the user The correction value α set (fixedly) by is stored in the correction value storage unit 44E3. Then, at the time of the first determination (step S60 in FIG. 12) after shifting to stable operation during the next interlocked operation, the stored correction value α is read and used. In this case, by fixing the correction value α, it is possible to reliably perform stable correction that matches the user's personal preference.

Until then, the correction value α is variably set by the above-described method, and the value at that time is stored in the correction value storage unit 44E3 at the end of the interlocked operation. When α is changed to be fixedly set manually as described above, the correction value α stored in the correction value storage section 44E3 may be reset to zero. Conversely, until then, the correction value α is fixedly set manually by the above-described method, and the value at that time is stored in the correction value storage unit 44E3 at the end of the interlocking operation. When the correction value α is changed to be variably set as described above at the start of operation, the correction value α stored in the correction value storage unit 44E3 is reset to 0 as described above, and the correction is performed. The correction value α may be increased or decreased from the value α=0 along the flow shown in FIG. 12 .

In the above embodiment, the inlet water temperature sensor 123 is provided in the return pipe 29 on the inlet side (inflow side) of the water-refrigerant heat exchanger 7, and according to the detected inlet water temperature T1 of hot water, Although so-called return temperature control, which controls the rotational speed of the compressor 5, is performed, the present invention is not limited to this. That is, a sensor is provided in the supply pipe 28 on the outlet side (outflow side) of the water-refrigerant heat exchanger 7, and the compressor is controlled so that the supply temperature of hot water detected by this sensor becomes a predetermined target supply temperature. 5 may be controlled by so-called forward temperature control.

Furthermore, the two-way valve 16 in the above embodiment may be replaced with an expansion valve with a closing function. Also, instead of the expansion valves 8 and 15, an ejector may be used as a decompressor.

Further, in the above-described embodiment, as the heat source device, the outdoor fan 9 that passes the refrigerant to the air heat exchanger 10 and blows outside air is provided, and heat is exchanged between the outside air as the heat source and the refrigerant. Although the case of using the outdoor unit 4, which is a heat pump, has been described as an example, the present invention is not limited to this. That is, the heat source equipment may be configured such that water or antifreeze is supplied to the heat source side heat exchanger and heat is exchanged between the liquid and the refrigerant in the heat source side heat exchanger.
Alternatively, a heat source side heat exchanger may be provided in the ground or in a water source of relatively large capacity, and heat may be exchanged between the ground or the water source and the refrigerant in this heat source side heat exchanger. Furthermore, a composite heat source type configuration may be employed, which includes a heat pump circuit using heat from the underground or water source and another heat pump circuit using air heat.
Furthermore, in place of the liquid, the outside air, or the water source, other substances (e.g., smoke, flue gas, various high-temperature gases, etc.) may be used as long as they can exchange heat with the refrigerant in the heat source side heat exchanger. Gas, hot sand, dust, fluid solids including various particles, etc.) can be passed through the heat source side heat exchanger, or heat from sunlight, reflected light, other radiation, etc. can be supplied to the heat source side heat exchanger. good.

In the above, the arrows shown in FIGS. 3 and 4 show an example of signal flow, and do not limit the direction of signal flow.

Further, the flowcharts shown in FIGS. 11 and 12 do not limit the present invention to the procedures shown in the above flows, and procedures may be added, deleted, or changed in order without departing from the gist and technical idea of the invention. You may

In addition to the methods already described above, the methods according to the above-described embodiments and modifications may be appropriately combined and used.

In addition, although not exemplified one by one, the present invention can be implemented with various modifications within the scope of the invention.

Reference Signs List 1 air conditioning system 4 outdoor unit 5 compressor 7 water-refrigerant heat exchanger 7a water-side channel (water channel)
7b Refrigerant side flow path (refrigerant passage)
9 outdoor fan 10 air heat exchanger (outdoor heat exchanger)
11 refrigerant pipe 14 indoor heat exchanger 17 indoor unit 18 indoor fan 19 indoor temperature sensor (room temperature detection means)
20 indoor unit control unit 21 indoor unit remote controller (first remote controller)
25 indoor temperature setting switch (setting means)
27 floor heating terminal 28 going pipe (going pipe line, hot water pipe)
29 return pipe (return pipe line, hot water pipe)
33 heating circulation circuit (hot water circulation circuit)
34 circulation pump 36 floor heating remote controller (second remote controller)
44 outdoor unit control unit 44B compressor control unit (compressor control means)
44E1 correlation storage unit (correlation storage means)
44E2 temperature level determination unit (temperature level determination means)
44E3 correction value storage unit (correction value storage means)
44E5 target return temperature determination unit (target return temperature determination means)
123 incoming water temperature sensor (return temperature detection means)
125 Refrigerant pipe 126 Refrigerant pipe 130 Refrigerant circulation circuit T1 Water inlet temperature Tcon Air conditioner set temperature Tout Refrigerant discharge temperature Tr Indoor temperature (actual room temperature)
α correction value

Claims (7)

an indoor unit equipped with an indoor heat exchanger that exchanges heat between the indoor air in the space to be air-conditioned and the refrigerant;
a floor heating terminal that heats the floor surface of the air-conditioned space;
A water-refrigerant heat exchanger that includes a refrigerant passage and a water passage, and performs heat exchange between the refrigerant in the refrigerant passage and water in the water passage, an outdoor heat exchanger that performs heat exchange between the refrigerant and the outside air, and an outdoor unit equipped with a compressor;
a first remote controller for operating the indoor unit, comprising setting means for setting a room temperature in the air-conditioned space;
a second remote controller for operating the floor heating terminal;
has
The water passage of the water-refrigerant heat exchanger and the floor heating terminal are annularly connected by a hot water pipe to form a hot water circulation circuit, and the indoor heat exchanger, the refrigerant passage of the water-refrigerant heat exchanger, the The outdoor heat exchanger and the compressor are connected by refrigerant pipes to form a refrigerant circulation circuit, and the indoor unit heats the indoor air in a warm air heating operation and the floor heating terminal heats the floor surface. In an air conditioning system that can perform interlocking operation with floor heating operation,
Based on the correlation between a plurality of predetermined temperature divisions for the room temperature and temperature levels of hot water and water predetermined corresponding to each temperature division and supplied to the floor heating terminal via the hot water circulation circuit, the temperature level determining means for determining the temperature level of the hot water corresponding to the set room temperature set by the setting means;
target temperature determining means for determining a corresponding target return temperature or target outgoing temperature according to the temperature level of the hot water determined by the temperature level determining means;
compressor control means for controlling the rotation speed of the compressor so that the temperature of the hot water flowing through the hot water circulation circuit becomes the target return temperature or the target forward temperature determined by the target temperature determination means ;
An air conditioning system comprising: The hot water circulation circuit is
an outgoing pipeline that introduces hot water in the water passage heated by heat from the refrigerant passage of the water-refrigerant heat exchanger to the floor heating terminal;
a return pipeline for returning the hot water introduced through the going pipeline and radiated at the floor heating terminal from the floor heating terminal;
with
The air conditioning system further includes:
return temperature detection means for detecting the return temperature of the hot water in the return pipeline or outgoing temperature detection means for detecting the outgoing temperature of the hot water in the outgoing pipeline ;
The target temperature determination means is
For the temperature level of the hot water determined by the temperature level determination means , based on the correlation between the temperature level and the target return temperature or the target forward temperature predetermined corresponding to each temperature level . determining the corresponding target return temperature or target outbound temperature ;
The compressor control means is
The return temperature detected by the return temperature detecting means or the going temperature detected by the going temperature detecting means is set to the target return temperature or the target going temperature determined by the target temperature determining means. 2. The air conditioning system according to claim 1 , further comprising: controlling the rotation speed of said compressor. temperature level correction means for setting a desired correction value for the temperature level of the hot water determined by the temperature level determination means, and performing correction using the correction value;
The target temperature determination means is
determining the target return temperature or the target outgoing temperature according to the temperature level corrected by the temperature level correction means;
The air conditioning system according to claim 1 or 2 , characterized in that: The correction value is
4. The air conditioning system according to claim 3 , wherein the value is a fixed value that is set based on an operation via the first remote controller or the second remote controller. The indoor unit
Having room temperature detection means for detecting the actual room temperature of the air-conditioned space,
The correction value is
4. The air conditioning system according to claim 3 , wherein the air conditioning system is variably set according to the difference between the actual room temperature detected by the room temperature detecting means and the set room temperature. The interlocking operation is
After starting the compressor, a first step of performing the warm air heating operation without performing the floor heating operation, and according to the rise in room temperature in the target space by the first step, the floor heating operation and the A second stage in which a warm air heating operation is performed in parallel, and a third stage in which the floor heating operation is performed without performing the warm air heating operation in response to an increase in room temperature in the target space due to the second stage. and performed by several stages, including
In the third step, the temperature level correcting means corrects the temperature level of the hot water determined by the temperature level determining means using the correction value, and according to the corrected temperature level, 6. The air conditioning system according to any one of claims 3 to 5 , wherein said compressor control means controls the rotational speed of said compressor. Correction value storage means for storing the correction value at an appropriate timing after the correction value is set until the interlocking operation is terminated;
a correction value obtaining means for reading out the correction value stored in the correction value storage means when the interlocked operation is newly started after the end of the interlocked operation and the transition to the third stage is performed;
further having
The temperature level correcting means is
correcting the temperature level of the hot water determined by the temperature level determining means using the correction value read by the correction value obtaining means;
The target temperature determination means is
determining the target return temperature or the target outgoing temperature using the temperature level corrected by the temperature level correction means;
7. The air conditioning system according to claim 6 , characterized by:

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