JPH0449023B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a bathtub heating device with a heat pump type heating device that heats a bathroom and heats hot water in the bathtub. (Prior Art) When heating a bathroom and heating hot water in a bathtub, the following configuration has conventionally been generally adopted. That is, as shown in the conventional system configuration diagram of FIG. 6, a heat pump type bathtub unit 102 is attached to a bathtub 101, and an electric heater type bathroom heating device 104 is installed on the ceiling of a bathroom 103. ing. The bathtub unit 102 includes a bathtub heat exchanger 10.
5, and the hot water in the bathtub 101 is transferred to the bathtub heat exchanger 105.
A circulation pump 106 is provided which circulates the fluid throughout the air. The bathroom heating device 104 is also equipped with an electric heater 107 and a blower fan 108. An outdoor unit 109 as a heat source side unit is connected to the bathtub heat exchanger 105, and the outdoor unit 109 is equipped with an outdoor heat exchanger and a compressor. The hot water is circulated through the outdoor heat exchanger and the bathtub heat exchanger 105, and the amount of heat absorbed from the outside by the outdoor heat exchanger is radiated to the hot water in the bathtub 101 by the bathtub heat exchanger 105. , is configured to heat the hot water in the bathtub 101. Further, in the conventional example with such a configuration, when the bathtub heat exchanger 105 and the bathroom heating device 104 are respectively driven automatically, the bathtub heat exchanger 1
02, a hot water temperature sensor for detecting the hot water temperature in the bathtub 101 is provided on the suction side of the circulation pump 106, and the detected hot water temperature is determined based on a comparison between the hot water temperature detected by the hot water temperature sensor and the set temperature. When the temperature becomes lower than the set temperature, the circulation pump 106 is configured to be driven to maintain the detected hot water temperature at the set temperature, and the bathroom heating device 104 is configured to drive the circulation pump 106 to maintain the detected hot water temperature at the set temperature.
A bathroom temperature sensor is provided to detect the temperature inside the bathroom, and based on a comparison between the bathroom temperature detected by the bathroom temperature sensor and the set temperature, an electric heater 107 and a blower fan 1 are installed to maintain the detected bathroom temperature at the set temperature.
It was configured to drive 08. (Problems to be Solved by the Invention) However, in the case of the conventional example having such a configuration, since the electric heater 107 is used in an extremely humid place, there is a risk of electric shock and there is a drawback that safety is lacking. However, it also had the disadvantage of high power consumption, making it uneconomical. The present invention has been made in view of the above circumstances, and it is possible to heat the bathroom safely and economically, and to heat the bathroom and the bathtub by increasing the size of the compressor. In addition, the purpose is to make it durable and large enough to be used. (Means for Solving the Problems) In order to achieve the above object, the bathtub heating device with a heat pump type heating device of the present invention has the following features: unit 4, a bathtub heat exchanger 8 connected in series to the bathroom heating heat exchanger 28, and a circulation pump 10 for circulating hot water in the bathtub 3 to the bathtub heat exchanger 8. Bathtub unit, heat source side heat exchanger 22, and heat source side heat exchanger 2
2 to the bathroom heating exchanger 28 and a compressor 23 for circulating refrigerant to the bathtub heat exchanger 8; and a hot water temperature sensor for detecting the temperature of hot water in the bathtub 3. 16, and a bathroom temperature sensor 30 that detects the temperature inside the bathroom 5.
and a bathtub heating means that outputs a bathtub heating request signal to drive the circulation pump 10 and the compressor 23 when the hot water temperature detected by the hot water temperature sensor 16 is lower than the set temperature; When the detected bathroom temperature is lower than the set temperature, a bathroom heating request signal is output to the blower fan 29 and the compressor 23.
When the bathtub heating request signal and the bathroom heating request signal are output at the same time, only one of the bathtub heating means and the bathroom heating means is operated, and when the operation is completed, Subsequently, the compressor 23 is configured to include an operation control means for operating the other compressor while maintaining the compressor 23 in a driven state. (Function) According to this configuration, when the bathroom 5 is heated by the heat pump type by the bathroom heating heat exchanger 28 and the bathtub heating request signal and the bathroom heating request signal are output simultaneously, for example, In the case where the bathtub heating means is always operated with priority, when a bathroom heating request signal is received during the operation of the bathtub heating means, the hot water in the bathtub 3 is heated up to the set temperature and the bathtub heating means is activated. Waiting for the bathroom heating means to operate until the operation of the bathtub heating means is completed, and activating the bathroom heating means following the completion of the operation of the bathtub heating means,
Further, when a bathtub heating request signal is received during the operation of the bathroom heating means, the operating state of the bathroom heating means is switched to the operating state of the bathtub heating means in response to the bathtub heating request signal, and the hot water in the bathtub 3 is set. After heating up to the temperature and the operation of the bathtub heating means is completed, the bathroom heating means is subsequently operated. When prioritizing the operation in response to the heating request signal that was output first When the bathtub heating request signal is received while the bathtub heating means is in operation, the hot water in the bathtub 3 is heated up to the set temperature and the bathtub is heated. Waiting for the bathroom heating means to operate until the operation of the bathroom heating means is completed, and activating the bathroom heating means following the completion of the operation of the bathtub heating means;
In addition, if a bathtub heating request signal is received during the operation of the bathroom heating means, the operation of the bathtub heating means is waited until the temperature in the bathroom 5 rises to the set temperature and the operation of the bathroom heating means is completed. The bathtub heating means is operated subsequent to the completion of the operation of the heating means. As mentioned above, the bathtub heating means and the bathroom heating means are operated selectively and continuously, and the four-way valve is configured such that the bathroom heating heat exchanger 28 and the bathtub heat exchanger 8 are connected in series. without being switched,
The hot water in the bathtub 3 and the bathroom 5 can be heated while the compressor 23 is continuously driven. (Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a system configuration diagram of a bathtub heating device with a heat pump type heating device according to an embodiment of the present invention. In this figure, 1 is an outdoor unit as a heat source side unit, and 2 is an initial hot water filling control unit that supplies water and hot water into the bathtub 3 at a predetermined ratio and puts a set amount of hot water at a set temperature into the bathtub 3. A heat pump type bathtub unit 4 is used to maintain the hot water in the bathtub 3 at a set temperature after completion of the bath.
6 is an indoor unit for heating, cooling, and air conditioning the room; 7 is a hot water tank unit. The bathtub unit 2 includes a heat pump type bathtub heat exchanger 8, a circulation pump 10 that circulates hot water in the bathtub 3 to the bathtub heat exchanger 8 through a circulation pipe 9, and a hot water pipe 12 that supplies hot water via a hot water valve 11; a water supply pipe 14 that supplies city water via a water supply valve 13;
A mixing tank 15 is provided for mixing hot water and water from the hot water supply pipe 12 and the water supply pipe 14, respectively. Further, a hot water temperature sensor 16 is provided on the suction side of the circulation pipe 9 relative to the circulation pump 10. The hot water storage tank unit 7 includes a hot water storage tank 17.
, a heat exchanger 18 for the hot water storage tank, and a ball tap 19 that opens a valve to supply water when the water level in the hot water storage tank 17 drops below a set water level, and closes the valve to automatically stop water supply when the water level reaches the set level. Hot water tank 17
A hot water supply pump 21 is provided to supply hot water. As shown in the refrigerant circuit diagram in FIG. 2, the outdoor unit 1 includes an outdoor heat exchanger 22 as a heat source side heat exchanger, an outdoor fan 22a, a compressor 23 for circulating refrigerant, and a liquid receiver 24. , accumulator 25, 25, first and second four-way switching valve SV ₁ ,
SV ₂ , first to fourth electric expansion valves EV _0, EV _1,
EV ₂ , EV ₃ , first and second liquid shutoff valves V _{1 ,} V ₂ ,
first and second gas shutoff valves V3 _{, V4} , and
A check valve _V5 is provided. Each of the indoor units 6, 6 is equipped with an indoor heat exchanger 26 and an indoor fan 27. The bathroom heating unit 4 is also equipped with a bathroom heating heat exchanger 28, a blower fan 29, and a bathroom temperature sensor 30 for detecting the temperature inside the bathroom 5. In FIG. 1, 31 is a ventilation fan for ventilating the inside of the bathroom 5. The first and second four-way switching valves SV ₁ , SV ₂ and the first to fourth electric expansion valves EV ₀ , EV ₁ ,
Each of the EV ₂ and EV ₃ is configured to automatically control its operation using a control means, and the operation is controlled as shown in the table below to switch between hot water supply operation mode, heating operation mode, reheating/drying (bath heating) driving mode,
Cooling operation mode, hot water supply and heating in a state where the cooling exhaust heat can be used (hot water supply + cooling) operation mode, recovering residual hot water exhaust heat and recovering heat from the hot water in the bathtub 3 for cooling. An operation mode that heats hot water while making use of the generated heat (hot water supply + recovery of bath waste heat), an operation mode that performs heating and reheating/drying in parallel (heating + bath heating), and an operation mode that uses remaining hot water exhaust heat. The heat of the hot water in the bathtub 3 is recovered for recovery and cooling, and the recovered heat can be used to supply and heat the hot water, and also performs cooling in parallel (hot water supply + cooling + bath waste heat). (recovery) hot water supply operation mode can be selected.

[Table] Next, the operating state in the reheating/drying operation mode according to the present invention will be explained. *When operating in reheating/drying operation mode Discharge port 23a of compressor 23 → first four-way switching valve
SV ₁ (solid line) → 2nd four-way switching valve SV ₂ (broken line) → 1st
Gas shutoff valve V ₃ → Bathroom heating heat exchanger 28 → Bathtub heat exchanger 8 → 4th electric expansion valve EV ₃ (FD) → 1st
Liquid closing valve V ₁ → Liquid receiver 24 → First electric expansion valve EV ₀
(SH) → Outdoor heat exchanger 22 → 2nd four-way switching valve
SV ₂ (broken line) → accumulators 25, 25 → suction port 23b of compressor 23 to form a refrigerant flow path that circulates, and by operating the compressor 23 and driving the circulation pump 9 or the blower fan 29, The amount of heat absorbed from the outside by the outdoor heat exchanger 22 is radiated to the hot water in the bathtub 3 by the bathtub heat exchanger 8, or is radiated into the bathroom 5, reheating the bath, and reheating the bath. The bathroom 5 is designed to provide heating inside the room or to function as a drying room for laundry and the like. FIG. 3 is a block diagram showing a schematic configuration of the electric circuit, and 32 is a printed circuit board provided within the bathtub unit 2. As shown in FIG. This printed circuit board 32 includes a bathtub/bathroom control section 33 and a key matrix 3.
4. Interface 35, said ventilation fan 29
A first relay switch R1 that drives a fan motor (not shown) and a second relay switch R2 that drives the circulation pump 10 are provided. The bathtub/bathroom control unit 33 receives a temperature signal from the bathroom temperature sensor 30, a water temperature signal from the hot water temperature sensor 16, and a heat exchange sensor 36 that detects the refrigerant temperature in the bathtub heat exchanger 8. In addition to inputting the refrigerant temperature signal, a first operating unit (bath controller) 37 set inside the bathroom 5 and a second operating unit for remote control set outside the bathroom 5 such as the kitchen are used.
Various command signals from each driving operation section 38 are inputted via the key matrix 34. With these configurations, in the first or second operation section 37, 38, as the water temperature in the bathtub 3 and the temperature in the bathroom 5 are set to desired temperatures, the set water temperature signal and the setting are changed. Each temperature signal is sent to the bathtub via the key matrix 34.
The set hot water temperature and set bathroom temperature are input to the bathroom control unit 33 and stored respectively, and an operation command signal is sent when the operation switch is turned on.
When the off switch is turned on, a heating operation command signal is input to the bathtub/bathroom control section 33 via the key matrix 34, respectively. The above-mentioned heating on/off switch is used to prevent heating in the bathroom 5 by turning it off when heating is not needed, such as when the bathroom 5 does not like heating. After the start of operation, the bathtub/bathroom control unit 33 performs bathroom heating when the detected bathroom temperature becomes lower than the set bathroom temperature based on a comparison between the bathroom temperature detected by the bathroom temperature sensor 30 and the set bathroom temperature. The bathroom heating means is configured to output a request signal, and the bathroom heating means outputs a drive signal to each of the first relay switch R1 and the interface 35 in response to the bathroom heating request signal,
The interior of the bathroom 5 is heated by driving the ventilation fan 29. Further, the bathtub heating means is configured to output a bathtub heating request signal when the detected hot water temperature becomes lower than the set hot water temperature based on a comparison between the hot water temperature detected by the hot water temperature sensor 16 and the set hot water temperature, The bathtub heating means outputs a drive signal to each of the second relay switch R2 and the interface 35 in response to the bathtub heating request signal,
Reheating is performed by driving the circulation pump 10. Furthermore, when the bathtub heating request signal and the bathroom heating request signal are output at the same time, the bathtub/bathroom control section 33 always controls the heating of the bathtub 3, that is, the reheating, while the compressor 23 remains driven. The operation control means is configured to give priority to heating the bathroom 5 following the completion of reheating. The interface 35 transmits the drive signal from the bathtub/bathroom control section 33 to the outdoor control section 39 provided in the outdoor unit 1 by bidirectional serial transmission, and in response, the drive signal from the bathtub/bathroom control section 33 is transmitted to the outdoor control section 39 provided in the outdoor unit 1. In addition to controlling the switching of the two four-way switching valves SV ₁ and SV ₂ , the first to fourth electric expansion valves EV _1, EV _2, EV _3
, EV ₄ , and drive and control the fan motor (not shown) of the outdoor fan 22a and the compressor 23, respectively.
Furthermore, based on the refrigerant temperature signal from the heat exchange sensor 36, when the refrigerant temperature becomes higher than the set temperature, peak cut is performed, and conversely, when the refrigerant temperature becomes lower than the set temperature, cold draft prevention is performed. ing. Next, the operations of the bathroom heating means, bathtub heating means, and operation control means will be explained using the flowchart shown in FIG. 4 and the time chart of signal waveforms shown in FIG. 5. First, the bathtub heating means determines whether the bathtub heating flag is 1, that is, whether a bathtub heating request signal has been output (S1). Here, if the bathtub heating request signal is output, as shown in FIG. 5 A, C and D, the circulation pump 10 is driven (ON) by the bathtub heating means (S2),
In addition, even if the blower fan 29 is being driven, it is stopped (OFF) (S3), and then the compressor 23 is turned off.
is activated (ON) (S4), and the water temperature sensor 16 is activated (S4).
Reheating is performed until the detected hot water temperature becomes higher than the set temperature. When the bathtub heating request signal is not output, it is determined in step S1 that the bathtub heating flag is not 1, and the process proceeds to step S5.
Even if the circulation pump 10 is being driven, it is stopped (OFF), and then the bathroom heating means determines whether the bathroom heating flag is 1, that is, whether the bathroom heating request signal has been output (S6 ). Here, if the bathroom heating request signal is output, the bathroom heating means drives (ON) the ventilation fan 29 (S7), as shown in FIG. , compressor 23
If the is in a stopped state, the compressor 23 is driven (ON)
do. With these configurations, when the bathtub heating request signal and the bathroom heating request signal are output at the same time, the following operations are performed. When a bathroom heating request signal is received during the operation of the bathtub heating means, the circulation pump 10 is continued to be driven until the hot water in the bathtub 3 is heated up to the set temperature and the operation of the bathtub heating means is completed. wait for operation. Therefore, as shown in FIG.
After the bathtub heating means has finished operating, the bathroom heating means is operated to turn on the blower fan 2.
Drive 9. In addition, as shown in Fig. 5 A and B, when a bathtub heating request signal is received during the operation of the bathroom heating means, the compressor 23 is maintained in the driving state as shown in Fig. 5 C and D. In response to the bathtub heating request signal, the blower fan 29 is stopped and the circulation pump 10 is driven to switch from the operating state of the bathtub heating means to the operating state of the bathtub heating means, and the hot water in the bathtub 3 is set. After the heating reaches the temperature and the operation of the bathtub heating means is completed by stopping the circulation pump 10, as shown in FIG. , subsequently activating the bathroom heating means. When the bathroom heating request signal is not output, it is determined in step S6 that the bathroom heating flag is not 1, and the process proceeds to step S8.
Along with stopping the ventilation fan 29 (OFF),
The compressor 23 is stopped (OFF) (S9). In this embodiment, the operation control means is configured so that when the bathtub heating request signal and the bathroom heating request signal are output at the same time, the operation by the bathtub heating means is given priority.
For example, when a bathroom heating request signal is received while the bathtub heating means is in operation, only the circulation pump 10 is turned on after the hot water in the bathtub 3 has heated up to the set temperature and the compressor 23 is maintained in the operating state. stop,
Thereafter, the blower fan 29 is driven to switch to the operation of the bathroom heating means, and conversely, when a bathtub heating request signal is received during the operation of the bathroom heating means, the temperature in the bathroom 5 is heated up to the set temperature. After that, only the blower fan 29 is stopped while the compressor 23 remains in the driving state, and then the circulation pump 1 is turned on.
As described above, the operation control means may be configured to always give priority to the operation in response to the heating request signal outputted first, as described above. In short, when the bathtub heating request signal and the bathroom heating request signal are output at the same time, only one of the bathtub heating means and the bathroom heating means is operated, and following the completion of the operation, the compressor 23 is driven. Various operation control means can be employed as long as they can be configured to operate one at the same time. In the above embodiment, a so-called multi-system is shown in which the bathtub unit 2 and the bathroom heating unit 4 are used together with the indoor unit 6 and the hot water storage tank unit 7, respectively. 4 and the outdoor unit 1 may independently constitute a bathtub heating device with a heat pump type heating device. Further, in the above embodiment, the bathtub heat exchanger 8, the bathroom heating heat exchanger 28, the outdoor heat exchanger 22, and the compressor 23 are connected in series, but the present invention , the bathtub heat exchanger 8 and the bathroom heating heat exchanger 28 are connected to the outdoor heat exchanger 22.
It may also be connected to the compressor 23 and the compressor 23 separately. (Effects of the Invention) As described above, according to the present invention, since the bathroom 5 is heated by a heat pump type, there is no fear of electric shock unlike when using an electric heater, and energy efficiency is good. Therefore, it has become possible to heat the bathroom 5 safely and economically. Furthermore, when both the bathtub 3 and the bathroom 5 are required to be heated, if the bathtub heating means and the bathroom heating means are operated simultaneously, the compressor 23 has enough capacity to withstand the combined heat load of both. However, in the present invention, since the bathtub heating means and the bathroom heating means are operated selectively, the thermal load required for heating the bathtub 3 and the bathroom 5 are reduced. It is only necessary that the compressor 23 has a capacity sufficient to withstand a large heat load among the heat loads required for heating the compressor 23.
The compressor 23 can now be downsized. Furthermore, when the bathtub heating request signal and the bathroom heating request signal are output at the same time, after only one of the bathtub heating means and the bathroom heating means is operated, the bathroom heating heat exchanger 2 is activated following the completion of the operation.
8 and the bathtub heat exchanger 8 are connected in series, the four-way valve is not switched and the other is operated while the compressor 23 is maintained in the driven state. Compressor 2
3, and immediately after that, the compressor 23 is stopped.
Compared to the case where the compressor 23 is restarted, the frequency of starting and stopping the compressor 23 can be reduced, and the durability of the compressor 23 can be improved.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of a bathtub heating device with a heat pump heating device according to an embodiment of the present invention, and FIG.
3 is a block diagram showing the schematic configuration of the electric circuit, FIG. 4 is a flowchart explaining the control operation, FIG. 5 is a time chart of signal waveforms, and FIG. 6 is a refrigerant circuit diagram. 1 is a system configuration diagram of a conventional example. 1... Outdoor unit as a heat source side unit,
2... Bathtub unit, 3... Bathtub, 4... Bathroom heating unit, 5... Bathroom, 8... Bathtub heat exchanger, 10... Circulation pump, 16... Water temperature sensor,
22...Outdoor heat exchanger as a heat source side heat exchanger, 23...Compressor, 28...Bathroom heating heat exchanger, 29...Blower fan, 30...Bathroom temperature sensor.

Claims (1)

[Scope of Claims] 1. A bathroom heating unit 4 including a bathroom heating heat exchanger 28 and a blower fan 29; a bathtub heat exchanger 8 connected in series to the bathroom heating heat exchanger 28; A bathtub unit 2 including a circulation pump 10 that circulates hot water in the bathtub 3 in the bathtub heat exchanger 8, a heat source side heat exchanger 22, and the heat source side heat exchanger 2.
A compressor 23 that circulates and flows refrigerant from 2 to the bathroom heating heat exchanger 28 and the bathtub heat exchanger 8.
a heat source side unit 1 comprising: a hot water temperature sensor 16 for detecting the temperature of the hot water in the bathtub 3; and a bathroom temperature sensor 30 for detecting the temperature in the bathroom 5.
and a bathtub heating means that outputs a bathtub heating request signal to drive the circulation pump 10 and the compressor 23 when the hot water temperature detected by the hot water temperature sensor 16 is lower than the set temperature; When the detected bathroom temperature is lower than the set temperature, a bathroom heating request signal is output to the blower fan 29 and the compressor 23.
When the bathtub heating request signal and the bathroom heating request signal are output at the same time, only one of the bathtub heating means and the bathroom heating means is operated, and when the operation is completed, A bathtub heating device with a heat pump type heating device, further comprising an operation control means for operating the other compressor while maintaining the compressor 23 in a driven state.