JP3518353B2 - Heat pump heating system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type heating device for heating a floor by utilizing heat of condensation of refrigerant in a refrigeration cycle.

[0002]

2. Description of the Related Art An example of a heat pump type heating device as described above is described in JP-A-2-40440.
FIG. 5 shows a refrigerant circuit diagram of the device. In the figure, reference numeral 41 is a compressor of variable rotation speed by an inverter, that is, a compressor of which compression capacity is variable. Indoor heat exchange in which an indoor fan 43 is attached to the compressor 41 via a four-way switching valve 42. The reactor 44, the expansion valve 45, and the outdoor heat exchanger 47 provided with the outdoor fan 46 are sequentially connected to form a refrigerant circulation circuit. Further, the indoor heat exchanger 4
4, a floor heating panel 48 is connected in parallel, and electromagnetic valves 49 to 52 are provided on both sides of the indoor heat exchanger 44 and the floor heating panel 48, respectively.

In the heating apparatus having such a structure, the indoor fan 43 is operated to circulate the indoor air through the indoor heat exchanger 44, while the gas refrigerant compressed by the compressor 41 is heated from the indoor heat exchanger 44 to the outdoor heat. By the cycle of circulating the heat to the exchanger 47, the indoor air heated by the heat of condensation of the refrigerant condensed in the indoor heat exchanger 44 is blown out into the room to warm the room.

On the other hand, the gas refrigerant compressed by the compressor 41 is circulated from the floor heating panel 48 to the outdoor heat exchanger 47,
In a cycle in which the refrigerant is condensed by the floor heating panel 48, the floor heating panel 48 is heated by the heat of condensation of the refrigerant to perform floor heating. In this case, the floor heating panel 48 also has a function as a floor heating heat exchanger that directly exchanges heat with the refrigerant flowing through the floor heating panel 48.

By the way, if the warm air heating and the floor heating as described above are started at the same time when the heating operation is started, the time required for the room temperature to reach the set room temperature is longer than that in the case where the floor heating is not performed. Become. Therefore, in the device described in the above publication, when the heating operation that uses both hot air heating and floor heating is started, first, the hot air heating independent operation is started. At this time, the compressor 41 is operated at a maximum speed and the indoor fan 43 is operated in a constant mode such as strong wind.

[0006] Such hot air heating alone operation, as shown in FIG. 6, the initial temperature T _O room temperature rises from the set room temperature T _SA [Delta] T than (e.g. 3 ° C.) when the degree is reached at a lower temperature t performed until _1, floor heating operation is started at this time t _1. Then, in the period until the room temperature reaches the set room temperature T _SA , the operation in which the rotation speed of the compressor 41 is maximized is continued, and the floor heating is performed by the surplus capacity of the compressor 41.

As described above, in the apparatus described in the above publication, only warm air heating is initially performed, and the room temperature is set to the set room temperature T _SA.
By operating the compressor 41 at the maximum rotation speed until the temperature reaches, the time required for the room temperature to reach the set room temperature is shortened, thereby improving comfort.

At the time t when the room temperature reaches the set room temperature T _SA ,
_{From 2} , the operation is continued while gradually reducing the rotation speed of the indoor fan 43, and the floor temperature detected by the floor temperature sensor attached to the floor heating panel 48 is the set floor temperature T.
Once t ₃ when reaching the _SF, the indoor fan 43 is switched is suspended floor heating islanding. During this period,
The operation is continued while gradually reducing the rotation speed of the compressor 41 according to the temperature difference between the set floor temperature T _SF and the floor temperature, that is, the change in the floor heating load.

[0009]

However, in the apparatus described in the above publication, although the time required for the room temperature to reach the set room temperature T _SA becomes short, the bed temperature thereafter approaches the set bed temperature T _SF and stabilizes. Since it takes a long time to do so, there is a problem that it is difficult to obtain sufficiently satisfactory comfort.

That is, a flooring or the like is usually further laid on the floor heating panel 48. In this case, the floor surface temperature, that is, the floor surface temperature that directly affects the comfort of the user with respect to the floor temperature detected by the floor temperature sensor attached to the floor heating panel 48 as described above is shown in FIG. As indicated by the chain double-dashed line, the temperature rises with a delay from the detected bed temperature. Then, when the detected bed temperature will be maintained at reached the set floor temperature T _SF set bed temperature T _SF, heating rate of the floor surface temperature decreases with decreasing temperature difference between the detected bed temperature Prefecture Therefore, it takes a long time for the floor surface temperature to rise to the temperature near the set bed temperature T _SF and stabilize. In this way, particularly when the heating start-up period is until the floor surface temperature stabilizes near the set floor temperature T _SF , it takes a long time to stabilize the floor surface temperature indefinitely. It is difficult to obtain the sex.

The present invention has been made in view of the above problems, and an object thereof is to shorten the start-up time until the floor surface temperature is brought close to the set floor temperature and stabilized, thereby improving comfort. It is to provide a heat pump type heating device capable of performing.

[0012]

Therefore, in the heat pump type heating device of the first aspect, the floor heating panel 10 is provided with a compressor having a variable compression capacity and the condensation heat of the gas refrigerant compressed by the compressor.
While heating the above-mentioned compressor with a floor heating heat exchanger 7 for imparting to the above, a floor temperature detecting means 23 for detecting the floor temperature, and a compression capacity corresponding to the temperature difference between the set floor temperature and the detected floor temperature. A heat pump type heating device provided with an operation control means 25 for circulating a refrigerant to the floor heating heat exchanger 7 to perform a floor heating operation, at the time of start-up for raising a detected floor temperature toward a set floor temperature. The detected bed temperature reaches the set bed temperature, the compressor is operated at almost the maximum compression capacity until the set bed temperature is reached, and the maximum compression capacity of the compressor is reached until the set time elapses after the set bed temperature is reached. In addition, the startup operation control means for setting the above set time to be longer as the temperature difference between the set bed temperature and the detected bed temperature at a specific time point before the set bed temperature is reached becomes larger. 27 is provided.

According to this structure, the compressor is operated with almost the maximum compression capacity until the set bed temperature is reached when the detected bed temperature reaches the set bed temperature, and this operating state is maintained even after the set bed temperature is reached. As the temperature continues to rise, the detected bed temperature rises above the set bed temperature due to such operating conditions, and the floor surface temperature also approaches the set bed temperature without causing a large decrease in the rate of temperature rise. Rise. Further, such a compressor operation is performed for a time period set according to the temperature difference between the set bed temperature and the detected bed temperature at a specific time point. That is, when the temperature difference is large, the temperature difference between the floor surface temperature and the set bed temperature when the set floor temperature is reached is also large, and therefore, from this time point, depending on the temperature range in which the floor surface temperature is increased to the set bed temperature. By setting a longer time, it is possible to prevent the floor surface temperature from rising to almost the set floor temperature during this period and to prevent it from rising excessively further, and to quickly obtain a stable state at the set floor temperature. You can

A heat pump type heating device according to a second aspect of the present invention includes a compressor having a variable compression capacity, and a floor heating heat exchanger 7 for applying the condensation heat of the gas refrigerant compressed by the compressor to the floor heating panel 10. And a floor temperature detecting means 23 for detecting the floor temperature,
An operation control means 25 is provided for performing a floor heating operation by circulating the refrigerant through the floor heating heat exchanger 7 while operating the compressor with a compression capacity according to the temperature difference between the set bed temperature and the detected bed temperature. A heat pump type heating device consisting of the above, the compressor is operated with almost the maximum compression capacity until the detected bed temperature reaches the set bed temperature when the detected bed temperature rises toward the set bed temperature. In addition, the operating condition at the maximum compression capacity of the compressor is continued until the detected bed temperature reaches the set bed temperature at start-up, and the set bed temperature at start-up is set. It is characterized in that startup operation control means for setting the temperature so that it becomes higher as the temperature difference between the set bed temperature and the detected bed temperature at a specific time point before the floor temperature is reached is provided.

That is, in this case, in place of the set time in claim 1, the operating condition at the maximum compression capacity is continued until the detected bed temperature reaches the set bed temperature at startup. By setting the rising-time set bed temperature to a temperature that corresponds to the reached temperature of the detected bed temperature when the set time in claim 1 elapses, almost the same control as in claim 1 is performed. Therefore, even with this configuration, similarly to the above, the floor surface temperature rises to almost the set bed temperature, and further excessive rise is suppressed, and a stable state at the set bed temperature can be promptly obtained. it can.

The heat pump type heating device according to claim 3 is provided with an indoor heat exchanger for applying the condensation heat of the gas refrigerant to the indoor air, and a room temperature detecting means 21 for detecting the room temperature,
At the time of startup to increase the detected room temperature and the detected floor temperature by using the warm air heating operation and the floor heating operation in which the refrigerant is circulated in the indoor heat exchanger, respectively, toward the set room temperature and the set floor temperature, respectively.
The control by the startup operation control means 27 is characterized in that the time point when the detected room temperature reaches the set room temperature before the set bed temperature is reached is performed as the specific time point.

That is, even at the time of start-up in which both hot air heating and floor heating are used in combination, the capacity of the compressor operating at almost the maximum compression capacity after the above-mentioned specific time point is the hot air heating and floor heating. The distribution ratio for and does not change significantly,
Most of them will be used for floor heating. Therefore, the heat input condition to the floor heating panel 10 becomes almost constant,
Correlating the temperature difference between the set bed temperature and the detected bed temperature at the specific time point, and the continuous operating condition of the compressor necessary to subsequently reach the bed surface temperature near the set bed temperature with higher accuracy. Will be possible. As a result, a state in which the floor surface temperature stabilizes at the set floor temperature can be obtained more quickly and more reliably.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a schematic diagram showing the structure of a heat pump type heating device according to an embodiment of the present invention. In the figure, reference numeral 1 denotes an outdoor unit, which is not shown in the outdoor unit 1, but has a variable speed compressor using an inverter as described above, an outdoor heat exchanger, an outdoor fan, and an expansion valve. The indoor unit 2 in which the indoor heat exchanger and the indoor fan are installed in the same manner as described above, and the floor heating kit 3 described later are connected to the outdoor unit 1 by refrigerant pipes 4 and 5, respectively. . The indoor unit 2 is shown as a ceiling-embedded type installed on the ceiling of the air-conditioned room, but this may be a wall-mounted type indoor unit.

The indoor heat exchanger in the indoor unit 2 is connected to the outdoor unit 1 by the refrigerant pipe 4 to form a refrigerant circulation circuit, and the gas refrigerant compressed by the compressor is transferred from the indoor heat exchanger to the outdoor unit. The indoor warm air heating operation is performed by a refrigeration cycle in which the indoor heat exchanger functions as a condenser and the outdoor heat exchanger functions as an evaporator by circulating the heat to the heat exchanger. That is, the heat of condensation of the gas refrigerant in the indoor heat exchanger is imparted to the indoor air circulated through the indoor heat exchanger by the operation of the indoor fan, and the air heated by this is blown out from the indoor unit 2 to reach room temperature. Rises.

The floor heating kit 3 is installed in the vicinity of the air-conditioning room, and the refrigerant pipe 5 is connected to one end side thereof and the hot water pipe 6 is connected to the other end side thereof. A hot water heat exchanger (floor heating heat exchanger) 7 is provided in the floor heating kit 3 to heat the water by applying the condensation heat of the gas refrigerant compressed by the compressor to the water. Is provided. The refrigerant flow path in the hot water heat exchanger 7 is connected to the outdoor unit 1 through the refrigerant pipe 5 in parallel with the indoor heat exchanger, and the water flow path in the hot water heat exchanger 7 passes through the pump 8. Is connected to the hot water pipe 6.

On the other hand, a floor heating panel 10 in which a meandering hot water flow path 9 is formed is laid on the floor surface of the air conditioning room. The hot water pipe 6 is connected to the hot water flow passage 9 of the floor heating panel 10. Therefore, while operating the pump 8 to circulate the water from the hot water heat exchanger 7 to the hot water flow passage 9 of the floor heating panel 10, the gas refrigerant compressed by the compressor is transferred from the hot water heat exchanger 7 to the outdoor heat exchanger. The floor heating operation is performed by a refrigeration cycle in which the hot water heat exchanger 7 functions as a condenser and the outdoor heat exchanger functions as an evaporator. That is, the hot water warmed by the heat of condensation of the refrigerant in the hot water heat exchanger 7 circulates through the floor heating panel 10, thereby increasing the floor temperature.

A flooring 11 is further laid on the floor heating panel 10. On the other hand, in order to perform operations such as starting and stopping the warm air heating operation, the wireless remote controller 1
2 and a wired remote controller 13 for performing the same operation for the floor heating operation, respectively.
The room temperature and the floor temperature desired by the user are set by these remote controllers 12 and 13. In addition, when the user performs the setting for linking the warm air heating operation and the floor heating operation, for example, a heating operation that uses the wireless remote control 12 to start a heating operation that uses both the warm air heating operation and the floor heating operation described later. Start-up operation is started. Hereinafter, the wireless remote controller 12 in which the room temperature is set as described above is referred to as a room temperature setting unit, and the wired remote controller 13 in which the floor temperature is set is referred to as a floor temperature setting unit.

FIG. 4 shows a control block diagram of the above apparatus. As shown in the figure, this apparatus includes a room temperature comparison unit 22 for comparing the set room temperature T _SA set by the room temperature setting unit 12 with a room temperature T _A detected by a room temperature sensor (room temperature detection means) 21. A floor temperature comparison unit 24 that compares the set floor temperature T _SF set by the floor temperature setting unit 13 with a floor temperature T _F detected by a floor temperature sensor (bed temperature detection means) 23 is provided. .

The room temperature sensor 21 is composed of a temperature sensor such as a thermistor provided at the indoor air inlet of the indoor unit 2, and the room temperature sensor 21 detects the room air temperature as room temperature T _A. It The floor temperature sensor 23 is composed of a temperature sensor such as a thermistor attached to the floor heating panel 10, and the floor temperature sensor 23 allows the floor heating panel 10 to operate.
Is detected as the bed temperature T _F. The floor temperature sensor 23 may be a temperature sensor attached to the hot water pipe 6 connected to the floor heating kit 3.
The temperature of the hot water flowing through the return pipe in the hot water pipe 6 may be detected as the floor temperature T _F.

The room temperature comparison unit 22 generates a room temperature thermo-on signal when the detected room temperature T _A is lower than the set room temperature T _SA , and this signal and the temperature difference obtained by subtracting the room temperature T _A from the set room temperature T _SA. Operation control section (operation control means) 2 described later
Enter in 5. On the other hand, when the room temperature T _A is equal to or higher than the set room temperature T _SA , the room temperature thermo-off signal is generated and input to the operation control unit 25.

Also in the bed temperature comparing section 24, in the same manner as described above,
When the detected bed temperature T _F is lower than the set bed temperature T _SF , a bed temperature thermo-on signal is generated, and this signal and the set bed temperature T _{SF are} set.
And a temperature difference obtained by subtracting the floor temperature T _F from the temperature input to the operation control unit 25. When the floor temperature T _F is equal to or higher than the set floor temperature T _SF , a floor temperature thermo-off signal is generated and input to the operation control unit 25.

The operation control unit 25 includes the above-mentioned comparison units 22.2.
The operating condition is set on the basis of the input signal from No. 4, for example, in the case of the warm air heating alone operation, the refrigerant is circulated to the indoor heat exchanger when the room temperature thermo-on signal is input from the room temperature comparison unit 22. In addition, a drive signal is output to the output control unit 26 so as to operate the indoor fan. In addition, the output control unit 2 determines the temperature difference between the room temperature T _A and the set room temperature T _SA at this time, that is, the operating frequency according to the warm air heating load, and drives the compressor at this operating frequency.
The compressor drive signal is output to 6. On the other hand, the room temperature comparison unit 22
When the room temperature thermo-off signal is input from,
The refrigerant flow to the indoor heat exchanger is stopped and the indoor fan is stopped.

Also in the case of the floor heating alone operation, the refrigerant is circulated through the hot water heat exchanger 7 when the floor temperature thermo-on signal is inputted from the floor temperature comparison unit 24, and , The output control unit 26 so as to operate the pump 8.
The drive signal is output to. Further, the output control unit 26 is configured to determine the temperature difference between the floor temperature T _F and the set floor temperature T _{SF at} this time, that is, the operating frequency according to the floor heating load, and drive the compressor at this operating frequency. Output the compressor drive signal.
On the other hand, when the floor temperature thermo-off signal is input from the floor temperature comparison unit 24, the circulation of the refrigerant to the hot water heat exchanger 7 is stopped.

Thus, the room temperature thermo-ON / OFF signal,
Further, the hot air heating operation and the floor heating operation are respectively controlled based on the floor temperature thermo-ON / OFF signal, and the detected room temperature T _A or floor temperature T _F rises to the set room temperature T _SA / set floor temperature T _SF . The temperature is maintained at these set temperatures T _SA and T _SF .

On the other hand, in order to perform control at the time of heating start-up that uses both warm air heating operation and floor heating operation, the operation control section 25 further includes a startup operation control section (startup operation control means).
27 are provided. Hereinafter, the control content at the time of heating start-up performed by this control unit will be described with reference to FIG.

In a predetermined period from the operation start time t ₀ in the figure, the room temperature T _{A is changed} to the initial temperature T _A by the independent operation of the warm air heating in a similar manner to the conventional example described with reference to FIG.
_The operation is performed to raise the temperature from _O toward the set room temperature T _SA . At this time, the compressor operates at the maximum rotation speed, and the indoor fan operates in a constant mode such as strong wind.

Then, the operation mode switching temperature T at which the room temperature T _A is lower than the set room temperature T _SA by a predetermined temperature (for example, 3 ° C.)
_{When the} temperature reaches _B , the floor heating operation is started at the time t ₁ , and therefore, in the period until the room temperature T _A reaches the set room temperature T _SA , the capacity of the compressor operated at the maximum rotation speed is Floor heating is gradually shifted as the heating load decreases.

When such an operation is continued and the room temperature T _A reaches the set room temperature T _SA which is set to, for example, about 18 to 22 ° C., the room temperature thermostat is turned off at the time point t ₂ . In the present embodiment, the flow of the refrigerant to the indoor heat exchanger is stopped at this point, and therefore, the floor heating independent operation is switched at this point. It should be noted that the indoor fan continues its operation while gradually reducing the rotation speed thereof in order to minimize the room temperature fluctuation after the room temperature T _A reaches the set room temperature T _SA .

On the other hand, as described above, the room temperature T _A is the set room temperature T
At the time point t ₂ when _SA is reached (hereinafter referred to as the specified time point), the startup operation control unit 27 causes the temperature difference ΔT _F between the detected bed temperature T _F1 and the set bed temperature T _SF at this time (hereinafter referred to as the specified time point). Mean temperature difference). Then, in the period after the specific point in time t _2, the rotational speed of the compressor to continue the floor heating islanding operation in operation has a maximum, whereby the floor temperature T _F, the bed temperature setting unit 13, for example 28 to The temperature rapidly rises toward the set bed temperature T _SF set to about 30 ° C. Then, when t ₃ when reaching the set floor temperature T _SF in this process, from the bed temperature comparing section 24 is switched to a state in which the bed temperature thermo-off signal is input, from the point t _3, the specific time temperature Difference ΔT _F
The above-described floor heating independent operation in which the number of rotations of the compressor is maximized is continued until an operation time (set time) t _m set in correspondence with the above is elapsed. Therefore, during this period, the bed temperature T _F further rises (period).

After that, at the time t ₄ when the operation time t _m elapses, the start-up operation control section 27 is switched to the control by the operation control section 25, whereby the floor temperature thermostat from the floor temperature comparison section 24 is turned on. According to the / OFF signal, the refrigerant flow to the hot water heat exchanger 7 is intermittently performed. Further, even for the compressor that has been operating at the maximum rotation speed until then, the operating state is switched to the rotation speed according to the temperature difference between the set bed temperature T _SF and the detected bed temperature T _F thereafter. As a result, after the bed temperature T _F was reduced to a set bed temperature T _SF, it is held in this setting bed temperature T _SF (period). Note that the indoor fan stops it in the time t _4.

In FIG. 1, the surface temperature of the flooring 11, which changes with the bed temperature T _F , that is, the bed surface temperature, is shown by a chain double-dashed line. The floor surface temperature rises with a rise in the floor temperature _TF , that is, the temperature of the floor heating panel 10 (hereinafter, referred to as a detected floor temperature in order to clarify the difference from the floor surface temperature). I will do it. Therefore, at the time t ₃ when the detected bed temperature T _F reaches the set bed temperature T _SF (hereinafter, referred to as when the set bed temperature is reached), the floor surface temperature is lower than the set bed temperature T _{SF, and} from this time point, the detected bed temperature T _SF is reached. in the conventional control to maintain the _F setting bed temperature T _SF, becomes takes a long time to the floor surface temperature reaches the subsequent setting floor temperature T _SF.

Therefore, in the present embodiment, even after the time t ₃ at which the set bed temperature is reached, the operation state is continued at the maximum rotation speed of the compressor to further raise the detected bed temperature T _F (hereinafter, referred to as It is called continuous operation). Thus, Atsushi Nobori rate of the floor surface temperature, prevents that significantly reduced the set bed temperature reached during t ₃ or later, rapidly rises towards the set floor temperature T _SF (period).

For example, as shown in FIG. 2, the operating time t _m of the continuous operation is as follows with respect to the specific time temperature difference ΔT _F.
It is stored in the startup operation control unit 27 in such a relationship that the larger ΔT _F is, the longer it is. More specifically, the time t _m required for the floor surface temperature to substantially reach the set floor temperature T _SF in the continuous operation is obtained in advance corresponding to the specific time temperature difference ΔT _F , and this is the startup operation control unit 27. Remembered in.

That is, as described above, the floor heating operation is
It starts at the time t ₁ when the room temperature T _A reaches the operation mode switching temperature T _B which is lower than the set room temperature T _SA by a predetermined temperature.
From this time, the operating time from the room temperature T _A reaching the set room temperature T _SA to the specific time t ₂ is short, and during this period, the compressor capacity is mainly spent for warm air heating, and there is an excess capacity. Since the floor heating is performed, the temperature rising rate of the detected floor temperature T _F is low. Therefore, during this period, the detected bed temperature T _F
The temperature difference between the floor surface temperature and the floor surface temperature does not occur so much, and this temperature difference increases greatly depending on the operating time in the next period.

During this period, all the capacity of the compressor operating at maximum speed is used for floor heating. Therefore, the rate of temperature rise of the detected bed temperature T _F in this period increases, and along with this, the rate of temperature rise of the floor surface temperature also increases, but the speed ratio between the two increases and the detected bed temperature T _F increases. The temperature difference from the floor surface temperature increases with time.

Further, during this period, the compressor is driven at the maximum number of rotations thereof, and the heat input condition to the floor heating panel 10 is substantially constant. Therefore, the temperature rise curve of the detected floor temperature T _F is the specific time t. Even if the temperatures at ₂ are different, they are almost the same, and the temperature rising curves of the bed surface temperature are also almost the same. Therefore, the temperature difference ΔT _D between the set bed temperature T _SF and the floor surface temperature at the time t ₃ when the set bed temperature is reached almost corresponds to the operating time in this period. On the other hand, this operating time is determined substantially corresponding to the specific time temperature difference ΔT _F at the specific time point t ₂ , so that the temperature difference ΔT _D substantially corresponds to the specific time temperature difference ΔT _F in the end. .

Therefore, the temperature difference ΔT _D , and thus the specific time temperature difference ΔT _F , can be associated with the operating time t _m of the continuous operation required to make the floor surface temperature reach the set floor temperature T _SF. Based on such a correspondence relationship, the relationship between the specific time temperature difference ΔT _F and the operation time t _{m of} continuous operation is obtained in advance, and this is stored in the startup operation control unit 27.

Such an operating time t _m is selected corresponding to the specific time temperature difference ΔT _F detected at the specific time t ₂ every time the heating operation is started, and the continuous operation is performed at this time t _m. Be seen. As a result, the room temperature T _A is the set room temperature T _SA
After that, the floor surface temperature quickly reaches the set floor temperature T _SF , and at the end of the continuous operation, the floor surface temperature reaches the set floor temperature T _SF.
It is possible to quickly obtain a stable state at this set bed temperature T _SF without exceeding the _SF excessively.

As described above, in the present embodiment, even after the detected bed temperature T _F reaches the set bed temperature T _SF , the maximum rotation speed of the compressor is maintained until the operation time t _m elapses. The operating state is continued, and this continuous operation is performed at a specific time t ₂
The operation time t _m set in advance is selected in correspondence with the magnitude change of the temperature difference between the set bed temperature T _SF and the detected bed temperature. As a result, the floor surface temperature becomes the set floor temperature T
Without unduly excess of _SF, a stable state in the vicinity of the setting floor temperature T _SF can be obtained quickly, therefore, it is possible to shorten the startup time of the floor heating, thereby improving comfort.

In particular, in the above-described embodiment, when the warm air heating operation and the floor heating operation are used in combination, the time when the detected room temperature T _A reaches the set room temperature T _SA is set as the specific time t ₂ , and the set bed temperature at this time is set. The operation time t _{m of} continuous operation is set in correspondence with the temperature difference ΔT _F between T _SF and the detected bed temperature T _F. In this case, after the specific time point t ₂ , the heat input condition to the floor heating panel 10 becomes almost constant, which causes the temperature difference between the set floor temperature T _SF and the detected floor temperature at the specific time point t _2. The floor surface temperature is set by continuous operation in response to changes in ΔT _F. Floor temperature T _SF
It is possible to more accurately associate the operating time t _m required to reach the time t. As a result, a state in which the floor surface temperature stabilizes at the set floor temperature T _SF can be obtained more quickly and more reliably.

The specific embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the present invention. For example, in the above embodiment, the control configuration is such that the operating time t _m of continuous operation is set in correspondence with the specific time temperature difference ΔT _F at the specific time point t ₂ , but the higher the specific time temperature difference ΔT _{F, the} higher the control time. Set up floor temperature at startup, eg temperature difference Δ
The temperature reached by the detected bed temperature at the time of each operating time t _{m for} each T _F is determined, and the temperature substantially corresponding to this is determined by the temperature difference Δ.
Set as startup setting floor temperature of each T _F, detected bed temperature T _F
It is also possible to adopt a control configuration in which the operating state of the compressor at the maximum compression capacity is continued until the set temperature reaches the startup set bed temperature.

As the set-up bed temperature in this case, a temperature higher than the temperature range set as the set-up bed temperature T _SF , for example, about 28 to 30 ° C. is set for each specific time temperature difference ΔT _F. good to, or set the temperature rise from the floor temperature T _SF may be set for each particular time temperature difference [Delta] T _F, for each at each heating startup, setting floor temperature T _SF at that temperature rise of the It may be configured to calculate the set bed temperature at startup by adding to.

On the other hand, in the above embodiment, the time t _{2 at} which the room temperature T _A reaches the set room temperature T _SA is set as the specific time, but the detected bed temperature T
_If the temperature difference between _F and the floor surface temperature is small, for example, the time t ₁ at which the room temperature T _A reaches the operation mode switching temperature T _B or another time such as the operation start time t ₀ is set. Is also possible.

Further, in the above, the refrigerant flow to the indoor heat exchanger is stopped when the room temperature T _A reaches the set room temperature T _SA , but after that, the warm air heating operation is continued according to the room temperature thermo-on / off signal. It may be done.

In the above, the floor heating kit 3 having the hot water heat exchanger 7 as a heat exchanger for floor heating is provided, and the heat of condensation of the gas refrigerant is applied to the floor heating panel 10 via hot water as an example. However, as in the conventional example described with reference to FIG. 5, the floor heating panel configured to directly flow the gas refrigerant from the compressor is provided, and therefore, the floor heating panel is provided with the floor heating heat. The present invention can also be applied to a device having a configuration that also functions as an exchanger.

Further, in the above description, the heat pump type heating device for performing floor heating and hot air heating is taken as an example. However, for example, when the room temperature is raised by a heating device of a type other than the heat pump type, this device is used. A heat pump type heating device exclusively for floor heating that is used in combination with the above, and a room temperature rise can be obtained only by floor heating operation without providing a heating device for raising the room temperature. It can also be applied to a heat pump type heating device dedicated to floor heating installed in such an airtight house. In these cases, for example, when the operation is started, the operating condition for continuous operation may be set based on the temperature difference between the detected bed temperature T _F and the set room temperature T _SA at that time.

[0053]

As described above, according to claims 1 and 2 of the present invention.
In the heat pump type heating device of, since the operating state with the compressor almost at the maximum compression capacity continues even after the detected bed temperature reaches the set bed temperature, the floor surface temperature also greatly decreases in the heating rate. Raises towards the set bed temperature without occurring. Moreover, the operation of such a compressor is performed until the set time corresponding to the temperature difference between the set bed temperature and the detected bed temperature at a specific point of time elapses, or at the startup set bed temperature corresponding to the temperature difference. By performing until the detected bed temperature is reached, the floor surface temperature rises to almost the set bed temperature during this period, and it is suppressed that it rises excessively further and a stable state near the set bed temperature is promptly obtained. Can therefore be
Comfort is improved because the floor heating time can be shortened.

In the heat pump heating system according to the third aspect of the present invention, even when the warm air heating and the floor heating are used together, the compressor of the compressor which is operated at the maximum compression capacity after the specific time point is reached. Most of the capacity is used for floor heating, since the distribution ratio between hot air heating and floor heating does not change significantly. Therefore, since the heat input condition to the floor heating panel becomes almost constant, the temperature difference between the set floor temperature and the detected bed temperature at the specific time point and then the surface floor temperature is made to reach the set floor temperature near temperature. It is possible to more accurately associate with the continuous operating condition of the compressor necessary for the above. As a result, a state in which the floor surface temperature stabilizes at the set floor temperature can be obtained more quickly and more reliably.

[Brief description of drawings]

FIG. 1 is a time chart showing changes in room temperature and floor temperature at the time of heating start-up, and operating states of a compressor and an indoor fan in a heat pump heating device according to an embodiment of the present invention.

FIG. 2 is a graph for explaining the relationship between the temperature difference ΔT _F between the set bed temperature and the detected bed temperature at a specific time when the heating is started and the continuous operation time t _m of the compressor at the maximum rotation speed. Is.

FIG. 3 is a schematic diagram showing a configuration of the heat pump heating device.

FIG. 4 is a control block diagram in the heat pump heating device.

FIG. 5 is a refrigerant circuit diagram showing a configuration of a conventional heat pump type heating device.

6 is a time chart showing changes in room temperature and floor temperature at the time of heating start-up and operating states of a compressor and an indoor fan in the apparatus of FIG.

[Explanation of symbols]

1 outdoor unit 2 Indoor unit 3 floor heating kit 7 Hot water heat exchanger (heat exchanger for floor heating) 10 floor heating panel 11 flooring 21 Room temperature sensor (room temperature detection means) 23 Floor temperature sensor (Floor temperature detection means) 25 Operation control unit (operation control means) 27 Startup operation control unit (startup operation control means)

Claims (3)

(57) [Claims] 1. A compressor having a variable compression capacity, a floor heating heat exchanger (7) for imparting condensation heat of a gas refrigerant compressed by the compressor to a floor heating panel (10), and a floor temperature. And a floor temperature detecting means (23) for detecting the temperature, and a refrigerant flowing through the floor heating heat exchanger (7) while operating the compressor with a compression capacity according to the temperature difference between the set bed temperature and the detected bed temperature. A heat pump type heating device provided with an operation control means (25) for performing a floor heating operation by means of a floor heating operation, wherein the detected bed temperature reaches the set bed temperature at the time of startup for raising the detected bed temperature toward the set bed temperature. The compressor is operated at almost the maximum compression capacity until the set bed temperature is reached, and further the operating state at the maximum compression capacity of the compressor is continued until the set time elapses from the time when the set bed temperature is reached, and The set time is the set bed at a specific point before the set bed temperature is reached. Startup operation control means (27) that is set to be longer as the temperature difference between the temperature and the detected bed temperature is larger
A heat pump type heating device characterized by being provided with. 2. A compressor having a variable compression capacity, a floor heating heat exchanger (7) for imparting condensation heat of the gas refrigerant compressed by the compressor to a floor heating panel (10), and a floor temperature. And a floor temperature detecting means (23) for detecting the temperature, and a refrigerant flowing through the floor heating heat exchanger (7) while operating the compressor with a compression capacity according to the temperature difference between the set bed temperature and the detected bed temperature. A heat pump type heating device provided with an operation control means (25) for performing a floor heating operation by means of a floor heating operation, wherein the detected bed temperature reaches the set bed temperature at the time of startup for raising the detected bed temperature toward the set bed temperature. Operate the compressor at almost the maximum compression capacity until the set bed temperature is reached, and then operate at the maximum compression capacity of the compressor until the detected bed temperature reaches the set bed temperature at startup when the set bed temperature is reached. While continuing the condition, set the above-mentioned set floor temperature at startup before the set floor temperature is reached. The heat pump heating device is provided with a start-up operation control means (27) for setting the temperature so that it becomes higher as the temperature difference between the set bed temperature and the detected bed temperature at the particular time point becomes larger. 3. An indoor heat exchanger for applying the heat of condensation of the gas refrigerant to the indoor air, and a room temperature detecting means (21) for detecting the room temperature, the temperature for circulating the refrigerant through the indoor heat exchanger. The start-up operation control means (27) at the time of start-up in which the detected room temperature and the detected floor temperature are raised toward the set room temperature and the set bed temperature by using the wind heating operation and the floor heating operation in combination.
The heat pump heating device according to claim 1 or 2, wherein the control is performed at the time when the detected room temperature reaches the set room temperature before the set bed temperature is reached, as the specific time.