JP4537647B2 - Air conditioner with floor heating system and control method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner with a floor heating system that combines a floor heating system that performs floor heating and an air conditioner capable of air conditioning and heating.
[0002]
[Prior art]
The conventional air conditioner combined with the floor heating function detects the number of rotations of the pump, and when it exceeds the reference range, it outputs an abnormal signal indicating that it is in an air-mixed state. It is generated or the operation of the pump is stopped.
Also, when an abnormality occurs in the hot water mat, air filter, etc., error information is conveyed by the hot water mat lamp, filter lamp, etc. corresponding to these emitting light.
[0003]
[Patent Document 1]
JP-A-8-129687 (page 3)
[0004]
[Problems to be solved by the invention]
However, what is disclosed in Japanese Patent Application Laid-Open No. Hei 8-129687 is only to tell what function causes the error and what causes the error. There was a problem that the user had no choice but to stop the device by looking at it.
[0005]
This invention is to provide an air conditioner with a floor heating system that continues operation with only a part of functions as long as the function does not cause trouble even if the object continues operation even if an abnormality occurs. It is the purpose.
[0006]
[Means for Solving the Problems]
It has a compressor, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor condenses and dissipates heat in the indoor heat exchanger through the piping, and evaporates and absorbs heat in the outdoor heat exchanger. Air conditioner for air conditioning and heating, tank, pump, hot water heat exchanger and floor heating panel, tank water discharged by the pump passes through the piping between the compressor and indoor heat exchanger A floor heating system that performs floor heating by exchanging heat with the refrigerant in a hot water heat exchanger provided in a pipe through which the refrigerant flows, and heating the floor heating panel, and a control means that controls the air conditioner and the floor heating system; An air conditioner with a floor heating system that includes a temperature sensor that detects the temperature of components that make up the floor heating system and transmits the temperature sensor to the control means, and the control means determines that the signal from the temperature sensor is not normal. Stop pump The floor heating stops at Rukoto continues the air-conditioning heating by continuing the operation of the compressor.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a schematic diagram of a configuration of an air conditioner with a floor heating system that includes an air conditioner and a floor heating system according to Embodiment 1 of the present invention. In the figure, an air conditioner 1 with a floor heating system includes an indoor unit 2 in an air conditioner part, an indoor unit control means 3 for controlling the operation of the indoor unit 2, an outdoor unit 4 in an air conditioner part, and an outdoor unit. It circulates between the outdoor unit control means 5 for controlling the operation of the hot water unit 6, the hot water unit 6 for heating the hot water for floor heating, the hot water unit control means 7 for controlling the operation of the hot water unit 6, and the hot water unit 6. Operation is performed by connecting the floor heating panel 8 that performs floor heating by heat radiation from the hot water, the indoor unit control means 3 and the hot water unit control means 7, and the hot water unit control means 7 and the outdoor unit control means 5. Communication means 9 for communicating control information necessary for control, and input means (remote control) for inputting commands for starting and stopping the cooling and heating operation, and various settings. Controller) and a 10. The indoor unit 2 is provided with display means 11 for displaying the air quality state and the operating state.
[0008]
FIG. 2 is a configuration diagram showing the relationship among the refrigerant circuit, the water circuit, and the components of the air-conditioning apparatus with a floor heating system according to Embodiment 1 of the present invention. In this figure, the function of each component in performing air conditioning heating and floor heating using the flow of refrigerant and water will be described separately for the air conditioner portion and the floor heating system portion. First, the configuration of the air conditioner portion will be described based on the refrigerant flow in the refrigerant circuit. The air conditioner portion can be cooled and heated, but FIG. 2 is switched to a refrigerant flow path during heating. In the figure, the refrigerant discharged from the compressor 12 is sent to a four-way valve 14 communicated by a first refrigerant pipe 13. The refrigerant passing through the four-way valve 14 is blocked from flowing because the check valve 15 is present in the pipe, and flows into the refrigerant pipe (hereinafter referred to as second refrigerant pipe) 16 branched from the first refrigerant pipe 13. It has become. The second refrigerant pipe 16 reaches the expansion device 18 and the electromagnetic valve 19 provided in parallel via the hot water heat exchanger 17. The refrigerant flows again from the second refrigerant pipe 16 to the first refrigerant pipe 13 via either the expansion device 18 or the electromagnetic valve 19 in accordance with the setting of the operation state to be described later, to the indoor heat exchanger 20. And flow. And the wind sent by the indoor fan 21 to the indoor heat exchanger 20 which works as a condenser is heated with a refrigerant | coolant, and the heating effect is acquired. Thereafter, the refrigerant is sent to the outdoor heat exchanger 23 through the electric expansion valve 22 as the expansion device. Then, it exchanges heat with the air blown by the outdoor fan 24 in the outdoor heat exchanger 23 that works as an evaporator. evaporation The resulting refrigerant returns from the four-way valve 14 through the accumulator 25 to the compressor 12 again. In addition, the flap 26 attached to the indoor unit 2 is for changing the blowing direction of cold air or warm air.
[0009]
Among the components constituting the refrigerant circuit, at least the compressor 12, the four-way valve 14, the outdoor heat exchanger 23, and the outdoor fan 24 constitute the outdoor unit 4 in FIG. 1, and at least the indoor heat exchanger 20 and the indoor fan. 21 constitutes the indoor unit 2 in FIG.
[0010]
Moreover, the structure of a floor heating system is demonstrated based on the flow of the water of a water circuit based on this FIG. In the figure, the pump 27 circulates the water in the water pipe 28, and the water sent to the hot water heat exchanger 17 by the pump 27 rises in temperature by exchanging heat with the refrigerant. The heating effect is obtained by flowing into the floor heating panel 8 and increasing the temperature of the floor heating panel 8. In addition, a tank 29 is provided in the middle of the water pipe 28 between the pump 27 and the floor heating panel 8, whereby the volume due to the expansion and contraction of the water accompanying the rise and fall of the water temperature in the water circuit. Regardless of the change, the amount of water flowing in the water circuit can be kept constant.
[0011]
Among the components constituting the water circuit, the pump 27, the tank 29, and the hot water heat exchanger 17 constitute the hot water unit 6 in FIG.
[0012]
As described above, in the air conditioning apparatus with a floor heating system, the water circulating through the water circuit is heated from the refrigerant circuit configured in the same way as the normal air conditioning apparatus through the hot water heat exchanger 17, and the floor heating panel 8 warms up.
[0013]
In addition, in such an air conditioner with a floor heating system, since various sensors are provided to grasp the situation at an early stage when an abnormality occurs, the function of various sensors with reference to FIG. explain.
[0014]
In the figure, an indoor unit control means 3 mainly controlling the indoor unit 2 controls the rotational speed of the indoor fan 21 and the angle of the flap 26 to detect an indoor temperature sensor 30, A signal from the indoor heat exchanger temperature sensor 31 that detects the temperature of the heat exchanger 20 is received. The outdoor unit control means 5 mainly controlling the outdoor unit 4 includes the rotational speed of the outdoor fan 24, switching of the four-way valve 14, the flow rate of the refrigerant from the compressor 12, and the opening of the electric expansion valve 22. A signal from an outdoor heat exchanger temperature sensor 32 that controls the degree and detects the temperature of the outdoor heat exchanger 23 is received. Further, the hot water unit control means 7 mainly controlling the hot water unit 6 controls the degree of opening of the electromagnetic valve 19 and the discharge amount of the pump 27 to detect the temperature of the hot water heat exchanger 17. Temperature sensor 33, return water temperature sensor 34 for detecting the temperature of the return water from the floor heating panel 8, and water level for detecting the water level in the tank 29 in order to prevent the water from being reduced and the pump 21 from burning out. It receives signals from the sensor 35 and a water supply temperature sensor 36 that detects the temperature of the water flowing from the hot water heat exchanger 17 toward the floor heating panel 8.
[0015]
In this way, the temperature, operation state, etc. of each component are monitored by the sensor, and signals from the sensor are taken into the indoor unit control means 3, the outdoor unit control means 5, and the hot water unit control means 7. The indoor unit control means 3, the outdoor unit control means 5 and the hot water unit control means 7 are connected by a communication means 9 so as to be able to transmit and receive signals and collectively constitute one control means. Therefore, if a signal is sent to the indoor unit control means 3 by the input means 10, the other two control means can be controlled. The hot water unit control means 7 is provided with an EEPROM 37 in which data necessary for heating by the floor heating system is written.
[0016]
By the way, in the apparatus which has two heating apparatuses in this way, according to a situation, only one side can drive | operate each, or both can be drive | operated, but the usage method which emphasizes one ability can be considered. In this air conditioning apparatus with a floor heating system, the following three patterns of heating operation states can be selected.
[0017]
The three patterns of heating operation states are a heating operation by an air conditioner (hereinafter referred to as a first operation state), and a combined operation of a heating operation by an air conditioner and a heating operation by a floor heating system (second operation state). ) And a heating operation by the floor heating system (hereinafter, a third operation state).
[0018]
The operation when heating operation is performed by selecting any one of the three patterns will be described. First, one of the three patterns is selected by the input means 10. At this time, the compressor 12 of the air conditioner operates regardless of which pattern is selected. Therefore, the input means 10 transmits a signal for starting the heating operation by the air conditioner to the indoor unit control means 3, and the indoor unit control means. 3, a start operation request is sent to the outdoor unit control means 5 via the hot water unit control means 7.
[0019]
In response to this operation request, the outdoor unit control means 5 sends a command to switch the four-way valve 14 so as to form a refrigerant circuit for heating operation, and fixes and compresses the command at that position (solid line display position in FIG. 2). Command machine 12 to start operation. As a result, the refrigerant discharged from the compressor 12 flows through the first refrigerant pipe 13, but is blocked by the check valve 15, so that the flow direction to the second refrigerant pipe 16 is changed. A first branching position that branches from the first refrigerant pipe 13 to the second refrigerant pipe 16 is shown in FIG. Note that the points below the point B are also shown in FIG.
[0020]
The refrigerant flowing through the second refrigerant pipe 16 is condensed and dissipated by the hot water heat exchanger 17, but it depends on the selection of the above three patterns whether the refrigerant flows through the expansion device 18 or the electromagnetic valve 19.
[0021]
In the first operation state or the second operation state (air conditioning / heating priority state), the electromagnetic valve 19 is opened by a command from the hot water unit control means 7. At this time, the refrigerant passes through the point B immediately after the hot water heat exchanger 17 and does not flow through the expansion device 18 but flows through the piping in which the electromagnetic valve 19 is arranged. The piping of the parallel expansion device 18 and the electromagnetic valve 19 is again connected. It passes through a single point C, passes through a second branch position returning from the second refrigerant pipe 16 to the first refrigerant pipe 13, and is condensed and radiated by the indoor heat exchanger 20 at the point D.
[0022]
On the other hand, in the second operation state (floor heating priority state) or the third operation state, the electromagnetic valve 19 is closed by a command from the hot water unit control means 7. Therefore, the flow of the refrigerant whose direction is changed from the point A to the second refrigerant pipe 16 passes through the point B immediately after the hot water heat exchanger 17, and the pipes of the throttle device 18 and the solenoid valve 19 connected in parallel from the throttle device 18 again. It passes through a single point C, passes through a second branch position returning from the second refrigerant pipe 16 to the first refrigerant pipe 13, and is condensed and radiated by the indoor heat exchanger 20 at the point D.
[0023]
The switching between the air conditioning heating priority state and the floor heating priority state in the second operation state is automatically performed by the control means monitoring the situation.
[0024]
When the electromagnetic valve 19 is opened and closed, the first operation state and the second operation state (air conditioning heating priority state), the second operation state (floor heating priority state) and the third operation state are performed. As for the relationship between the temperature of the indoor heat exchanger 20 and the temperature of the hot water heat exchanger 17 at the time of switching, the Mollier diagram in the state of the two branch circuits in FIG. 3 and the refrigerant circuit in FIG. This will be described with reference to a graph showing the relationship between temperature and pressure.
[0025]
First, when the solenoid valve 19 is open, the heat is condensed and dissipated through the pipe in which the solenoid valve 19 is disposed at the D-point indoor heat exchanger 20 at substantially the same temperature as the hot water heat exchanger 17. . For this reason, the Mollier diagram becomes a single-stage condensing circuit similar to a general air conditioner as shown by a dotted line in FIG. 3, so that the pressure in the hot water heat exchanger 17 of the refrigerant pipe and the indoor heat exchanger 20 The pressure is substantially equal. On the other hand, there is a correlation between the pressure and temperature of the refrigerant in the refrigerant pipe as shown in FIG. Therefore, between the indoor heat exchanger temperature sensor 31 and the hot water heat exchanger temperature sensor 33,
Measured value of indoor heat exchanger temperature sensor 31 ≈ measured value of hot water heat exchanger temperature sensor 33
This relationship holds.
[0026]
Next, when the electromagnetic valve 19 is closed, the refrigerant flowing through the second refrigerant pipe 16 passes through the expansion device 18, so that the pressure from point A to point B is higher than when the electromagnetic valve 19 is open. It becomes a pressure-reduced state at the point C, and further condenses at the condensation temperature lower than that of the hot water heat exchanger 17 by the indoor heat exchanger 20 at the point D to dissipate heat. Therefore, the Mollier diagram is a two-stage condensing circuit as shown by the solid line in FIG. 3, and therefore the pressure in the hot water heat exchanger 17 of the refrigerant pipe is larger than the pressure in the indoor heat exchanger 20. Therefore, according to the correlation between the pressure and temperature of the refrigerant in the refrigerant pipe of FIG. 4, between the indoor heat exchanger temperature sensor 31 and the hot water heat exchanger temperature sensor 33,
Measurement value of indoor heat exchanger temperature sensor 31 <Measurement value of hot water heat exchanger temperature sensor 33
This relationship holds. Note that points A to F described in the Mollier diagram of FIG. 3 represent the relationship between the pressure and the enthalpy at points A to F in FIG.
[0027]
Therefore, when the solenoid valve 19 is open, that is, in the first operation state or the second operation state (air conditioning / heating priority operation state), the temperatures of the hot water heat exchanger 17 and the indoor heat exchanger 20 are almost equal. Since it is the same, the measured value of the indoor heat exchanger temperature sensor 31 is transmitted to the outdoor unit control means 5, and when the electromagnetic valve 19 is closed, that is, in the second operation state (floor heating priority operation state) or the third operation. In the state, since the temperature of the hot water heat exchanger 17 is higher than that of the indoor heat exchanger 20, the measured value of the hot water heat exchanger temperature sensor 33 is transmitted to the outdoor unit control means 5.
[0028]
If the measured value of the received temperature is equal to or greater than a predetermined value, the outdoor unit control means 5 determines that the pressure of the correlated refrigerant is too high and protects the compressor 12 and the piping through which the refrigerant flows. Therefore, protection control is performed such that the operating frequency of the compressor 12 is reduced or stopped.
[0029]
In such a second refrigerant pipe 16, there are two types of refrigerant flow depending on whether the electromagnetic valve 19 is open or closed, but the refrigerant after the indoor heat exchanger 20 at point D is at point E. It expands by the electric expansion valve 22, evaporates by the outdoor heat exchanger 23 at the point F, absorbs heat from the air, and returns to the suction side of the compressor 12 via the accumulator 25. Therefore, on the Mollier diagram of FIG. The same pressure and enthalpy are obtained at any of the points D to F.
[0030]
The basic configuration and operation of the air conditioning apparatus with a floor heating system according to Embodiment 1 of the present invention are as described above. Next, a processing method when each component constituting such an apparatus fails will be described.
[0031]
Of the components of the air conditioning apparatus with a floor heating system according to Embodiment 1 of the present invention, the hot water heat exchanger temperature sensor 33, the water supply temperature sensor 36, the return water temperature sensor 34, and the water level sensor that are components related to the floor heating system 35 and EEPROM 37 cannot be heated because the temperature, water level, or control abnormality cannot be detected while floor heating is performed if a failure occurs in the second operation state. Does not hinder. Therefore, if it is possible to accurately detect whether these are normal or not, it is not always necessary to stop all functions when a failure occurs, and it is possible to stop only floor heating and continue air conditioning heating. it can. Hereinafter, a method for this will be described.
[0032]
First, the hot water heat exchanger temperature sensor 33, the water supply temperature sensor 36, and the return water temperature sensor 34 will be described. FIG. 5 is a graph showing the relationship between the temperature, voltage and resistance of a general temperature sensor, and FIG. 6 is a circuit diagram showing the configuration of the temperature sensor circuit. In general, as shown in FIG. 5, the temperature sensor has a characteristic that the resistance value is higher as the temperature is lower and the resistance value is lower as the temperature is higher. On the other hand, in FIG. 6, the temperature sensor circuit 38 includes a temperature sensor 39 connected to the microcomputer power supply 41 and the microcomputer 42 via the connector 40, and a voltage dividing resistor 43 from the connection point on the connector 40 with the microcomputer 42. It is configured by being connected to the ground 44 via. Using such a circuit, the microcomputer 42 obtains a divided voltage with respect to the voltage (reference voltage) of the microcomputer power supply 41 using an A / D converter provided in the microcomputer. The relationship shown in FIG. 5 is established between the divided voltage and the temperature thus obtained, and if the correspondence between the voltage and the temperature is stored in advance as a table, the temperature can be obtained from the divided voltage. Become.
[0033]
In FIG. 5, t is the temperature range that can occur in the control. _L ~ T _H The resistance value range of the temperature sensor corresponding to _L ~ R _H It becomes. Furthermore, as described above, the divided voltage corresponding to the resistance is V _L ~ V _H It becomes the range. Therefore, the divided voltage is V _L ~ V _H If the temperature sensor is out of the range, it is estimated that the temperature sensor is not normal, and the divided voltage is V _L If temperature sensor lead is open or connector is disconnected, V _H If it is above, it is determined that the temperature sensor lead is short-circuited.
[0034]
Next, the water level sensor 35 will be described. FIG. 7 is a circuit diagram showing the configuration of the water level sensor circuit. In the figure, a water level sensor circuit 45 is connected to a microcomputer 47 via a connector 46 and a microcomputer power supply 49 via a resistor 48 from a connection point on the connector 46 to the microcomputer 47 and a connector 46. It is comprised by connecting with the ground 50 via. The water level sensor 35 itself closes when there is enough water, and opens when there is not enough water, so when the water level sensor 35 is closed (when water is full), the microcomputer input becomes Lo, and the water level sensor When 35 is open (when water is insufficient), the microcomputer input becomes Hi. Therefore, when the microcomputer input level is read as Hi, it is determined that the water level is not normal. That is, it is determined that the water in the tank 29 is insufficient or the water level sensor 35 itself is not normal, for example, the lead connector is disconnected or the lead is disconnected.
[0035]
As described above, even when it is determined that the states of the hot water heat exchanger temperature sensor 33, the water supply temperature sensor 36, the return water temperature sensor 34, and the water level sensor 35 are not normal, as described above, the hot water heat exchanger The temperature sensor 33, the water supply temperature sensor 36, and the return water temperature sensor 34 measure the temperature of the parts that constitute the floor heating system, and the water level sensor 35 is the water level of the tank 29 that is one of the parts that constitute the floor heating system. Since these are measured, it is possible to perform air conditioning and heating even in a situation where these are not normal and must be stopped.
[0036]
FIG. 8 is a control flowchart when the hot water heat exchanger temperature sensor 33, the water supply temperature sensor 36, the return water temperature sensor 34, and the water level sensor 35 are not normal. Hereinafter, this flowchart will be described. First, since this control does not relate to the first operation state where the floor heating operation is not performed, the second operation state and the third operation state are selected and the heating operation is started. After operation, it is periodically determined whether the hot water heat exchanger temperature sensor 33, the water supply temperature sensor 36, the return water temperature sensor 34, and the water level sensor 35 are normal (s1). It is determined whether the operation state or the third operation state (s2), and in the third operation state, that is, in the case of only floor heating, the pump 27 is stopped, the floor heating operation is stopped, The entire apparatus is also stopped (s3). On the other hand, in the second operation state, that is, when air conditioning heating and floor heating are used together, the pump 27 is stopped, only the floor heating operation is stopped (s4), and the air conditioning heating is operated.
Even if it is determined in s1 that each sensor is normal, it is periodically determined whether or not the sensor is normal.
[0037]
In this flowchart, in the third operation state, the floor heating operation is stopped and the entire air conditioner with the floor heating system is stopped. However, the floor heating is stopped due to a failure of sensors related to the floor heating system. In a state that must be stopped, the user may judge the content of the alarm message that informs the type of failure and enable the air conditioning / heating, or it may be set in advance to automatically switch to the air conditioning / heating. May be.
[0038]
Next, the EEPROM 37 will be described. As described above, the EEPROM 37 is written with data necessary to perform floor heating and is not written with data related to air conditioning by air conditioning. Therefore, even when the EEPROM 37 is not normal, there is no problem in the data related to air conditioning by air conditioning. FIG. 9 is a read flowchart of the EEPROM. In the figure, when reading is started, the NG counter is first cleared (s11), then it is determined whether the number of NG counters is 3 or more (s12), and if less than 3, The first data read is performed (s13), and the checksum of the read data is determined (s14). If the data is OK (OK), the second data read is performed (s15), and the read data is checked. The quality of the thumb is judged (s16), and if it is good (OK), the contents of the data read out the first time are compared with the contents of the data read out the second time (s17). It is determined that the floor heating system can be operated as being normally read. When the checksum result of the first data of s14 is NG, when the checksum result of the second data of s16 is NG, and when the first data and the second data are different in s17 In this case, 1 is added to the NG counter (s18), and the number of NG counters in s12 is determined. If it is determined in s12 that the NG counter is three or more times, it is determined that the EEPROM 37 cannot be read normally, and it is determined that the operation of the floor heating system is impossible.
[0039]
The reason why the reading of the EEPROM 37 becomes impossible in this manner is that not only the failure of the EEPROM 37 itself but also the reading failure due to disturbance noise or the like is considered, so the NG counter is retried three times in s12. This number may vary.
[0040]
By performing the control as described above, when the floor heating and the air conditioning heating are used together as in the second operation state, the hot water heat exchanger temperature sensor 33, the return water temperature sensor 34, and the water supply temperature sensor 36 are used. When it is determined that the water level sensor 35 and the EEPROM 37 are not normal, only the floor heating can be stopped and only the air conditioning heating can be performed, so that the number of cases in which all functions are completely stopped and heating cannot be performed is reduced.
[0041]
In this embodiment, the hot water heat exchanger temperature sensor 33, the water supply temperature sensor 36, the return water temperature sensor 34, the water level sensor 35 and the EEPROM 37 are supposed to continue air conditioning and heating. If two or more of the sensors are broken, it is usually unthinkable. In such a case, set all the functions of the air conditioner with a floor heating system to stop so that air conditioning heating is not possible. Also good.
[0042]
Specifically, for example, when it is determined that the process of s1 in FIG. 8 is not normal, the number of times is measured by a counter, and the process of s4 is performed as it is and only air conditioning heating is performed. When it is determined that the sensor of s1 is not normal in the process of s1, the number of counters is added to 2, and when this value becomes 2 (which can of course be set to 3 or more), the process of s2 is skipped and s3 You may make it perform the process of.
[0043]
Embodiment 2. FIG.
In the first embodiment, the air conditioner with a floor heating system has been described that has a control that allows air conditioning and heating even if the floor heating cannot be performed when it is determined that it is not normal, but in the second embodiment of the present invention, The present invention relates to an air conditioner with a floor heating system capable of continuing floor heating as well as air conditioning heating under certain conditions. In addition, since the structure of the air conditioning apparatus with a floor heating system is based on what was demonstrated in Embodiment 1, the number of each component attaches | subjects the same thing, and abbreviate | omits description.
[0044]
FIG. 10 is a control flowchart of the heating operation in the second embodiment. First, the heating operation using both floor heating and air conditioning heating is started as in the second operation state, and it is determined whether the hot water heat exchanger temperature sensor 33 is normal (s21). Compares the temperature measurement value t1 of the hot water heat exchanger 17 measured by the hot water heat exchanger temperature sensor 33 with a temperature threshold value T set in advance for high pressure protection (s22), and the measurement value t1. Is smaller than the threshold value T, there is no pressure problem, so the process returns to s21 and the heating operation is continued. If the measured value t1 is equal to or greater than the threshold value T, the compressor 12 is stopped (s23).
[0045]
On the other hand, when it is determined in s21 that the hot water heat exchanger temperature sensor 33 is not normal, the measured value t1 of the hot water heat exchanger temperature sensor 33 and the measured value t2 of the indoor heat exchanger temperature sensor 31 are substantially equal. Therefore, the electromagnetic valve 19 is opened (s24). Thereby, the indoor heat exchanger temperature sensor 31 can replace the hot water heat exchanger temperature sensor 33.
[0046]
Therefore, it is determined whether or not the indoor heat exchanger temperature sensor 31 is normal (s25). If the indoor heat exchanger temperature sensor 31 is normal, the measured value t2 of the indoor heat exchanger 20 measured by the indoor heat exchanger temperature sensor 31 is determined. And a temperature threshold value T set in advance for high-pressure protection (s26). If the measured value t2 is smaller than T, the process returns to s25 to continue the heating operation, and the measured value t2 is larger than T. If so, the compressor 12 is stopped (s27). Further, when it is determined in s25 that it is not normal, the operation of the entire apparatus is stopped (s28).
[0047]
In this way, even when it is determined that the floor heating is prioritized even in the second operation state, even if it is determined that the hot water heat exchanger temperature sensor 33 is not normal, the electromagnetic valve 19 is opened and air conditioning heating is performed. By switching to the priority operation, alternative detection by the hot water heat exchanger temperature sensor 33 can be performed, so that the heating operation by the combined use of the air conditioner and the floor heating system can be continued while protecting the refrigerant pressure from increasing.
[0048]
FIG. 11 is a table in which functions that can be operated even if a temperature sensor malfunctions are arranged. Even if the rounded table is a failure of a temperature sensor or the like, it can be continuously operated as in the first embodiment, and the temperature sensor in the air conditioner portion as in the second embodiment can be substituted. It can be continuously operated.
[0049]
By doing this, even if some sensors are abnormal in the heating operation state in which floor heating and air conditioning heating are used together, floor heating and air conditioning heating are continued while the protection control is performed by the alternative sensor. can do.
[0050]
Embodiment 3 FIG.
In the third embodiment, a method for displaying the control state of the conventional air conditioner with a floor heating system on a remote controller or a display means will be described. In addition, since the structure of the air conditioning apparatus with a floor heating system is based on what was demonstrated in Embodiment 1, the number of each component attaches | subjects the same thing, and abbreviate | omits description.
[0051]
When it is detected that the component is not operating normally as in the previous embodiments, the LED is turned on to indicate that it is in a fault condition in order to restore the air conditioner with a floor heating system in a complete form as soon as possible. -Display on the indoor unit display means 11 using blinking, 7seg, liquid crystal or the like. FIG. 12 shows the display contents of the display means 11. As shown in this figure, a floor warming operation lamp indicating that the floor heating operation is being performed is provided, and it is assumed that the floor heating operation lamp is always lit during normal operation, and is blinked when a failure of a floor heating related component occurs. Further, a function of notifying the user with a sound may be provided to make the user aware that the failure is being displayed.
[0052]
Further, FIG. 13 shows the display contents of the display unit of the input means. As shown in FIG. 13, it is used based on the signal notifying normality sent from the indoor unit control means 3 to the input means 10 by infrared rays. The information is displayed on the display unit of the input means (remote controller) 10 so that the information can be seen at hand. For example, the floor warming operation display indicating that the floor heating operation is being performed is assumed to be always lit during normal operation, and the failure display of the floor heating related parts is performed by blinking at the time of failure. By doing so, it is possible to know the occurrence of a failure at the time of operation, so that the possibility of noticing the occurrence of the failure at an early stage is increased.
[0053]
Further, when the floor heating operation function is stopped and the operation is automatically switched to the heating operation using only the air conditioner in this way, the display means 11 displays the LED lighting / flashing, 7seg, liquid crystal, etc. to the user. Can inform you that the driving has been switched. FIG. 14 shows the display contents of the display means 11. For example, it is assumed that the alternating blinking of the heating operation lamp of the air conditioner and the heating operation lamp of the floor heating system is automatically switched from the floor heating operation to the heating operation by the air conditioner. Also in this case, it is possible to make the user more easily aware by combining with sound.
[0054]
FIG. 15 shows the display contents of the display unit of the input means 10, but when the heating operation by the floor heating system and the air conditioner is automatically switched to the heating operation by the air conditioner in this way. The display section of the input means (remote control) 10 so that information can be seen at the user's hand based on the signal notifying that the operation sent from the indoor unit control means 3 to the input means 10 using infrared rays has been switched. To display. For example, by alternately blinking the heating operation display of the air conditioner and the heating operation display of the floor heating system, the heating operation by the floor heating system and the air conditioner is automatically switched to the heating operation by the air conditioner. Shall.
[0055]
FIG. 16 shows the display contents of the display means for the service person. In order to easily identify the failure location, the failure location is displayed on the indoor unit display means 11 by lighting / flashing the LED, 7seg, liquid crystal, etc., and displayed on the display unit of the input means 10 by liquid crystal dots. For example, in the first digit, a number and a part are associated with each other, and if the EEPROM 37 is not normal, it is determined that “5” is displayed so that it can be associated with the failure part. Also, the second digit displays “I” for indoors, “O” for outdoor, and “F” for outdoor warming in order to express the distinction between indoor failures, outdoor failures, and floor heating system failures. To do.
[0056]
FIG. 17 shows the display contents of the display means for the service person using the liquid crystal. In this manner, if the liquid crystal dot display is used, the failure location can be clearly identified by displaying “water level sensor” more specifically. You may call attention in combination with sound as before.
[0057]
By doing so, it is possible to notify the user of an abnormality early after a failure occurs. In addition, the user can be made aware that the floor heating and the air conditioning heating have been switched to the air conditioning heating alone, so that the response to the failure is accelerated.
[0058]
Further, here, the case where the floor heating and the air conditioning heating are used together is described as being switched to only the air conditioning heating, but instead of the hot water heat exchanger temperature sensor 33 as in the second embodiment. Indoor Temperature sensor 3 0 When both floor heating and air-conditioning / heating are continued using the sensor, the fact that the sensor has been replaced may be notified by the blinking operation of the operation display on the display unit of the input means 10 or the display means 11.
[0059]
【The invention's effect】
By doing in this way, it can prevent stopping a whole heating function in all cases, and a heating state can be continued as much as possible.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an air conditioner with a floor heating system according to Embodiment 1 of the present invention.
FIG. 2 is a circuit diagram of refrigerant and water in the air conditioner with a floor heating system according to Embodiment 1 of the present invention.
FIG. 3 is a Mollier diagram of an air conditioner with a floor heating system according to Embodiment 1 of the present invention.
FIG. 4 is a relationship between refrigerant temperature and pressure.
FIG. 5 shows the characteristics of the temperature sensor according to Embodiment 1 of the present invention.
FIG. 6 is a circuit diagram of a temperature sensor circuit according to Embodiment 1 of the present invention.
FIG. 7 is a circuit diagram of a water level sensor circuit according to Embodiment 1 of the present invention.
FIG. 8 is a flowchart showing processing of detection results by a sensor according to Embodiment 1 of the present invention.
FIG. 9 is a flowchart showing processing of the EEPROM according to the first embodiment of the present invention.
FIG. 10 is a flowchart showing sensor switching processing according to Embodiment 2 of the present invention;
FIG. 11 is a relationship between a failure of a sensor or the like in Embodiment 2 of the present invention and a cooling / heating operation capable of continuous operation.
FIG. 12 is a display of display means in Embodiment 3 of the present invention.
FIG. 13 is a display on the display unit of the input means according to the third embodiment of the present invention.
FIG. 14 is a display of display means in Embodiment 3 of the present invention.
FIG. 15 is a display on the display unit of the input means according to Embodiment 3 of the present invention;
FIG. 16 is a display of display means in Embodiment 3 of the present invention.
FIG. 17 is a display of display means in Embodiment 3 of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus with floor heating system, 2 Indoor unit, 3 Indoor unit control means, 4 Outdoor unit, 5 Outdoor unit control means, 6 Hot water unit, 7 Hot water unit control means, 8 Floor heating panel, 9 Communication means, 10 input Means, 11 Display means, 12 Compressor, 13 First refrigerant pipe, 14 Four-way valve, 15 Check valve, 16 Second refrigerant pipe, 17 Hot water heat exchanger, 18 Throttle device, 19 Solenoid valve, 20 Indoor Heat exchanger, 21 indoor fan, 22 electric expansion valve, 23 outdoor heat exchanger, 24 outdoor fan, 25 accumulator, 26 flap, 27 pump, 28 water pipe, 29 tank, 30 indoor temperature sensor, 31 indoor heat exchanger temperature Sensor 31, 32 Outdoor heat exchanger temperature sensor, 33 Hot water heat exchanger temperature sensor, 34 Return water temperature sensor, 35 Water level sensor, 3 6 Water supply temperature sensor, 37 EEPROM, 38 Temperature sensor circuit, 39 Temperature sensor, 40 Connector, 41 Microcomputer power supply, 42 Microcomputer, 43 Voltage dividing resistor, 44 Ground, 45 Sensor circuit, 46 Connector, 47 Microcomputer, 48 Resistance, 49 Microcomputer Power supply, 50 ground.

Claims (9)

A compressor, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor is condensed by the indoor heat exchanger through a pipe to dissipate heat, and is evaporated by the outdoor heat exchanger. An air conditioner that performs air conditioning heating by absorbing heat;
A pipe having a tank, a pump, a hot water heat exchanger, and a floor heating panel, in which water in the tank discharged by the pump flows through the pipe, and the refrigerant flows between the compressor and the indoor heat exchanger A floor heating system that heats the floor heating panel by exchanging heat with the refrigerant in the hot water heat exchanger provided to the floor, and
Control means for controlling the air conditioner and the floor heating system;
An air conditioner with a floor heating system, comprising: a temperature sensor that detects the temperature of components that constitute the floor heating system and transmits the temperature to the control means,
When the control means determines that the signal from the temperature sensor is not normal, the floor heating is stopped by stopping the pump, and the air conditioning heating is continued by continuing the operation of the compressor. Air conditioner with floor heating system. The temperature sensor includes at least a hot water heat exchanger temperature sensor that detects a temperature of the hot water heat exchanger, a water supply temperature sensor that detects a temperature of water flowing from the hot water heat exchanger toward the floor heating panel, and a tank from the floor heating panel. The air conditioner with a floor heating system according to claim 1, wherein the air conditioner is one of return water temperature sensors that detect the temperature of water that has returned to water. A compressor, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor is condensed by the indoor heat exchanger through a pipe to dissipate heat, and is evaporated by the outdoor heat exchanger. An air conditioner that performs air conditioning heating by absorbing heat;
A pipe having a tank, a pump, a hot water heat exchanger, and a floor heating panel, in which water in the tank discharged by the pump flows through the pipe, and the refrigerant flows between the compressor and the indoor heat exchanger A floor heating system that heats the floor heating panel by exchanging heat with the refrigerant in the hot water heat exchanger provided to the floor, and
Control means for controlling the air conditioner and the floor heating system;
An air conditioner with a floor heating system, comprising a water level sensor for detecting a water level in the tank and transmitting it to the control means,
When the control means determines that the signal from the water level sensor is not normal, the floor heating is stopped by stopping the pump, and the air conditioning heating is continued by continuing the operation of the compressor. Air conditioner with floor heating system. A compressor, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor is condensed by the indoor heat exchanger through a pipe to dissipate heat, and is evaporated by the outdoor heat exchanger. An air conditioner that performs air conditioning heating by absorbing heat;
A pipe having a tank, a pump, a hot water heat exchanger, and a floor heating panel, in which water in the tank discharged by the pump flows through the pipe, and the refrigerant flows between the compressor and the indoor heat exchanger A floor heating system that heats the floor heating panel by exchanging heat with the refrigerant in the hot water heat exchanger provided to the floor, and
Control means for controlling the air conditioner and the floor heating system;
An air conditioner with a floor heating system, comprising an EEPROM to which data necessary for performing the floor heating is written and read to the control means,
When the control means determines that the EEPROM is not normal, the floor heating is stopped by stopping the pump, and the air conditioning heating is continued by continuing the operation of the compressor. Air conditioner with system. Input means capable of transmitting and receiving signals to and from the control means;
An indoor display means for displaying information from the control means,
The air conditioning with a floor heating system according to any one of claims 1 to 4, wherein at least one of the input means and the indoor display means displays that floor heating is stopped and air conditioning heating is continued. apparatus. A compressor, a solenoid valve, a throttle device, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor is provided with the solenoid valve when the solenoid valve is closed. Air that is condensed and radiated by the indoor heat exchanger through the pipe provided with the throttle device among the pipes provided with the throttle device and the piping provided with the throttle device, and evaporated by the outdoor heat exchanger to absorb heat An air conditioner for heating;
A tank, a pump, a hot water heat exchanger, and a floor heating panel; the water in the tank discharged by the pump passes through a pipe, and the refrigerant between the compressor, the solenoid valve, and the expansion device is A floor heating system that performs floor heating by exchanging heat with the refrigerant in the hot water heat exchanger provided in a flowing pipe and heating the floor heating panel;
Control means for controlling the air conditioner and the floor heating system;
A hot water heat exchanger temperature sensor for detecting the temperature of the hot water heat exchanger;
An air conditioner with a floor heating system comprising an indoor heat exchanger temperature sensor that detects the temperature of the indoor heat exchanger and transmits the detected temperature to the control means,
When the control means determines that the signal from the hot water heat exchanger temperature sensor is not normal, the electromagnetic valve is opened, and the signal from the indoor heat exchanger temperature sensor is sent from the hot water heat exchanger temperature sensor. An air conditioner with a floor heating system, which is processed as a signal. Input means capable of transmitting and receiving signals to and from the control means;
An indoor display means for displaying information from the control means,
At least one of the input means and the indoor display means displays a signal from the indoor heat exchanger temperature sensor as a signal from the hot water heat exchanger temperature sensor to indicate that floor heating and air conditioning heating are continued. The air conditioning apparatus with a floor heating system according to claim 6 . A compressor, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor is condensed by the indoor heat exchanger through a pipe to dissipate heat, and is evaporated by the outdoor heat exchanger. An air conditioner that performs air conditioning heating by absorbing heat;
A pipe having a tank, a pump, a hot water heat exchanger, and a floor heating panel, in which water in the tank discharged by the pump flows through the pipe, and the refrigerant flows between the compressor and the indoor heat exchanger A floor heating system that heats the floor heating panel by exchanging heat with the refrigerant in the hot water heat exchanger provided to the floor, and
Control means for controlling the air conditioner and the floor heating system;
A method for controlling an air conditioner with a floor heating system, comprising: a temperature sensor that detects a temperature of a part constituting the floor heating system and transmits the temperature to the control means,
And a step of determining whether or not a signal from the temperature sensor is normal, and a step of stopping the pump when determining that the signal is not normal and continuing the operation of the compressor. A method for controlling an air conditioner with a heating system. A compressor, a solenoid valve, a throttle device, an indoor heat exchanger, and an outdoor heat exchanger, and the refrigerant discharged from the compressor is provided with the solenoid valve when the solenoid valve is closed. piping between the throttle device is provided et the out of the pipe through a pipe in which the throttle device is provided with heat dissipation and condensed in the indoor heat exchanger, it absorbs heat and evaporates in the outdoor heat exchanger An air conditioner for air conditioning and heating;
A tank, a pump, a hot water heat exchanger, and a floor heating panel; the water in the tank discharged by the pump passes through a pipe, and the refrigerant between the compressor, the solenoid valve, and the expansion device is A floor heating system that performs floor heating by exchanging heat with the refrigerant in the hot water heat exchanger provided in a flowing pipe and heating the floor heating panel;
Control means for controlling the air conditioner and the floor heating system;
A hot water heat exchanger temperature sensor for detecting the temperature of the hot water heat exchanger;
A control method for an air conditioner with a floor heating system, comprising: an indoor heat exchanger temperature sensor that detects the temperature of the indoor heat exchanger and transmits the detected temperature to the control means,
Determining whether or not the signal from the hot water heat exchanger temperature sensor is normal, opening the solenoid valve when determining that the signal is not normal, and a signal from the indoor heat exchanger temperature sensor. And a step of processing as a signal from the hot water heat exchanger temperature sensor. A method for controlling an air conditioner with a floor heating system.

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