JP2001317806A - Bath device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath device which can make reheating at high heating efficiency regardless of the outdoor air temperature and the temperature of the hot water contained in a bathtub. SOLUTION: A control means U is constituted in such a way that the means U stores efficiency propriety discriminating conditions for discriminating whether the heating efficiency by means of a heat pump type heating section B exceeds that by means of an auxiliary heating section 35 from the outdoor air temperature and the temperature of the hot water contained in the bathtub, discriminates the propriety of the operation of the heating section B by discriminating whether or not the heating efficiency by means of the heating section B exceeds that by means of the heating section 35 based on the information on the detected results of an outdoor air temperature detecting means and a bathtub temperature detecting means 57 and the efficiency propriety discriminating conditions, and only operates the heat pump heating section B when the operation of the section B is satisfactory based on the discriminated results. When the operation of the section B is dissatisfactory, the means U executes automatic selective heating section operation for only operating the auxiliary heating section 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water circulating means for heating a hot water source by a heating means, passing the heat source through a radiator, and circulating the hot water and returning to the heating means, and a hot tub in a bathtub. And a bath tub water circulation means for circulating the heat so as to pass through the heat radiating portion is provided.In the heat radiating portion, heat is radiated from the hot water for the heat source to the bath tub hot water,
The present invention relates to a bath apparatus configured to heat bath water and provided with control means for controlling operation of the heating means.

[0002]

2. Description of the Related Art In such a bath apparatus, the hot-water circulating means is heated by a hot-water circulating means, passed through a heat radiating section, circulated back to the heating means, and circulated in a bath tub. By means of circulating hot water in the bath tub so as to pass through the heat radiating section, and radiating heat from the hot water for the heat source to the hot tub in the heat radiating section to heat the hot tub, so-called reheating of the bath It is.
Conventionally, the heating means is constituted by an electric heater type heating unit using an electric heater as a heat source (for example, see Japanese Patent Application Laid-Open No. 9-89).
No. 369).

[0003]

However, in the conventional bath apparatus, since the electric heater type heating unit using the electric heater as a heat source is used, the amount of work obtained with respect to the electric power supplied to the electric heater is small. However, the heating efficiency of the apparatus was low. The heating efficiency is indicated by a value obtained by dividing the performance (heating capacity) of the device by the amount of energy input to the device. Then, in recent years, in order to improve the heating efficiency of the apparatus, it has been considered to use a heat pump type heating unit that recovers heat from the outside air and heats using the recovered heat as a heating unit. By the way, since the amount of heat obtained by the heat pump heating unit changes depending on the outside air temperature and the bathtub water temperature, the heating efficiency of the heat pump heating unit changes depending on the outside air temperature and the bathtub water temperature.
The heating efficiency of the heat pump heating unit may be lower than the heating efficiency of the electric heater heating unit depending on the outside air temperature or the temperature of the bath water. Therefore, even if a heat pump type heating unit which is considered to have high heating efficiency is used as the heating means, additional heating with high heating efficiency cannot always be performed depending on the outside air temperature or the temperature of the bathtub water.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bath apparatus capable of performing additional heating with high heating efficiency regardless of an outside air temperature and a bathtub water temperature.

[0005]

Means for Solving the Problems [Invention according to claim 1]
The characteristic configuration according to claim 1 is characterized in that the heating means is constituted by a heat pump type heating unit and an auxiliary heating unit, and an outside air temperature detection unit for detecting a temperature of outside air, and a bathtub temperature detection for detecting a temperature of bathtub hot water. Means is provided, wherein the control means determines whether the heating efficiency of heating the bathtub hot water by the heat pump heating unit exceeds the heating efficiency of heating the bathtub hot water by the auxiliary heating unit, based on the outside air temperature and the bathtub hot water temperature. Is stored.The control unit is configured to control the heat pump heating unit based on the detection information of each of the outside air temperature detection unit and the bathtub temperature detection unit and the efficiency availability determination condition. Determine whether the heating efficiency is greater than the heating efficiency by the auxiliary heating unit, and determine whether to operate the heat pump heating unit,
Based on the discrimination result, when the operation of the heat pump heating unit is enabled, only the heat pump heating unit is operated, and when the operation of the heat pump heating unit is not allowed, only the auxiliary heating unit is operated. The configuration is such that the heating section automatic selection operation is performed. Claim 1
According to the characteristic configuration described in (1), the heating unit includes the heat pump heating unit and the auxiliary heating unit including an electric heater or a burner as a heat source. Then, the control means determines whether the heating efficiency of heating the bath water by the heat pump heating unit exceeds the heating efficiency of heating the bath water by the auxiliary heating unit from the outside air temperature and the bath water temperature. The efficiency availability determination condition is stored, and the control unit determines whether the heating efficiency of the heat pump heating unit is higher than the heating efficiency of the auxiliary heating unit based on the detection information of the outside air temperature detection unit and the bathtub temperature detection unit and the efficiency availability determination condition. If the heating efficiency of the heat pump heating unit exceeds the heating efficiency of the auxiliary heating unit based on the determination result, only the heat pump heating unit is operated, and the heat pump heating unit is operated. When the heating efficiency of the auxiliary heating unit is equal to or less than the heating efficiency of the auxiliary heating unit, a heating unit automatic selection operation of operating only the auxiliary heating unit is executed. In other words, based on the outside air temperature and the bath water temperature, it is determined which of the heating efficiency of the heat pump heating unit and the auxiliary heating unit is higher, and when the heating efficiency of the heat pump heating unit is higher than the heating efficiency of the auxiliary heating unit, Only the heat pump heating unit is operated, and when the heating efficiency of the heat pump heating unit is equal to or less than the heating efficiency of the auxiliary heating unit, only the auxiliary heating unit is operated. Therefore, it has become possible to provide a bath apparatus capable of performing additional heating with high heating efficiency regardless of the outside air temperature and the temperature of the bath water.

[0006] The invention according to claim 2 is characterized in that the heating by the heat pump type heating unit is performed by:
Boiling time for judging from the bathtub water temperature at the start of heating and the outside air temperature whether or not the expected boiling time set to be longer as the temperature of the bath water at the start of heating is set to be longer. The determination condition is stored, and the control unit determines whether or not the heat pump heating unit can be operated, and includes a determination result as to whether or not the expected boiling time based on the boiling time availability determination condition is satisfied. It is to be configured in. According to the characteristic configuration of the second aspect, the control unit satisfies the expected boiling time set such that the heating by the heat pump heating unit is set to be longer as the temperature of the bathtub hot water at the start of heating is lower. The condition for determining whether or not boiling time is required to determine whether or not the temperature of the bathtub at the start of heating and the outside air temperature is stored. Based on the outside air temperature detected by the air temperature detecting means and the condition for judging whether or not boiling time is possible, it is determined whether or not the required heating time required for boiling the bathtub by heating by the heat pump heating section is less than the expected boiling time. When the control unit determines that the heating efficiency of the heat pump heating unit exceeds the heating efficiency of the auxiliary heating unit and that the required heating time by the heat pump heating unit is shorter than the expected heating time, In this case, only the auxiliary heating section is operated. In other words, depending on the temperature of the bath water at the start of heating and the outside air temperature, heating by the heat pump heating unit has a higher heating efficiency than the auxiliary heating unit, but the heating capacity is reduced, and the time required for boiling is reduced by the user. In such a case, the heating capacity is larger than that of the heat pump heating unit, and the auxiliary heating unit that can reduce the time required for boiling is operated in such a case. . Therefore, it is possible to provide a bath apparatus that can increase the heating efficiency irrespective of the outside air temperature and the bathtub water temperature, and can perform additional heating so as to satisfy the expected boiling time of the user.

According to a third aspect of the present invention, the control means includes an auxiliary heating unit for automatically selecting the heating unit and a priority operation of the auxiliary heating unit to heat the bathtub hot water. Commanding means for instructing which of the heating unit automatic selection operation and the auxiliary heating unit independent operation to execute is provided to the control means. It is being done. According to the characteristic configuration of the third aspect, the control unit executes the heating unit automatic selection operation when the heating unit automatic selection operation is instructed based on the instruction information from the instruction unit, and executes the auxiliary heating unit alone. When the operation is instructed, the auxiliary heating unit alone is operated to give priority to only the auxiliary heating unit and heat the bathtub hot water. In other words, when the heating efficiency of the heat pump heating unit is higher than the heating efficiency of the auxiliary heating unit at the outside air temperature and the bathtub water temperature, the heat pump heating unit can perform additional heating with high heating efficiency,
For example, when the user wants to shorten the required time for boiling even if sacrificing the heating efficiency, if the command is issued by the command means, the auxiliary heating unit alone operation in which the auxiliary heating unit having a large heating capacity is preferentially operated is executed. It can be done. Therefore, the usability of the user can be further improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which a bath apparatus according to the present invention is applied to an engine heat pump type cooling and heating hot water supply system will be described with reference to the drawings. As shown in FIGS. 1 and 2, the engine heat pump type cooling / heating hot water supply system stores hot water while forming a temperature stratification in the hot water storage tank 1, supplies hot water stored in the hot water storage tank 1, and supplies hot water. A hot water storage unit A that heats and heats the bathtub hot water by radiating heat to the bathtub hot water from the heated hot water in the external heat radiating unit 2, and is capable of performing an air conditioning operation of a space to be air-conditioned and a heating operation for heating the hot water. And an engine heat pump type cooling / heating device B as a heat pump type heating unit.

The hot water storage unit A includes a hot water storage unit controller C for controlling the operation of the hot water storage unit A, a hot water storage tank 1, a circulation path 3 for circulating hot water, and a heating device for heating the hot water flowing through the circulation path 3. Means 4, an external heat radiating portion 2 for exchanging heat with hot water flowing through the circulation path 3 and radiating heat,
While the circulation pump P1 is operated to circulate hot water (corresponding to hot water for a heat source) in the circulation path 3, the heating means 4 heats the hot water and the external heat radiating section 2 radiates heat.

In the hot water storage tank 1, an uppermost thermistor S for detecting whether or not the hot water storage amount is equal to or more than a minimum secured amount as the hot water storage amount by detecting the hot water temperature.
1. An upper thermistor S2 for detecting whether the amount of hot water is small or more by detecting the temperature of the hot water, and a central thermistor for detecting whether the amount of hot water is medium or more by detecting the temperature of the hot water. S3, a bottom thermistor S4 for detecting whether or not the hot water storage amount is full by detecting the hot water temperature is provided. The installation positions of a plurality of thermistors are from the upper part of the hot water storage tank 1 to the uppermost thermistor S.
1, the upper thermistor S2, the middle thermistor S3, and the bottom thermistor S4 in this order. Then, as required by the user, the target hot water storage amount in the hot water storage tank 1 can be selected from three hot water storage amounts of "small", "medium", and "full" by the hot water storage remote control R2 or the like. .

The hot water storage tank 1 is connected from the bottom to a water supply channel 5 for supplying water to the hot water storage tank 1 using tap water pressure, and from the upper portion thereof to a hot water supply channel 6 for supplying hot water to a bathroom or a kitchen. The water is supplied from the water supply channel 5 to the hot water storage tank 1 only in an amount used in a bathroom or a kitchen. A mixing water supply channel 7 branched from the water supply channel 5 is connected to the hot water supply channel 6, and a mixing ratio between hot water from the hot water supply channel 6 and water from the mixing water supply channel 7 can be adjusted at the connection point. A mixing valve 8 is provided. A water supply thermistor 9 for detecting water supply temperature is provided at a branch point between the water supply path 5 and the mixing water supply path 7, and a check valve 10 is provided in each of the water supply path 5 and the mixing water supply path 7. ing. Incidentally, an overflow path 11 is connected to the hot water supply path 6, and the air release valve 1 is connected to the overflow path 11.
2 are provided.

Further, on the upstream side of the mixing valve 8 in the hot water supply path 6, the hot water supply path 6
A hot water outlet thermistor 13 for detecting the temperature of hot water supplied to the hot water supply passage 6 is provided.
Further downstream, a mixing thermistor 14 for detecting the temperature of the hot and cold water mixed by the mixing valve 8 and a hot water supply proportional valve 15 for adjusting the flow rate of hot and cold water in the hot water supply passage 6 are provided.

A hot water supply passage 6 downstream of the hot water supply proportional valve 15 has a general hot water supply passage 16 for supplying hot water to a hot water tap (not shown) such as a kitchen or a washroom, and a hot water supply passage for supplying hot water to a bathtub (not shown). The bath is branched into a hot water path 17, the hot water path 17 is connected to a bath return path 18 from the bathtub, and hot water is supplied to the bathtub through both the bath return path 18 and the bath going path 19. The general hot water supply path 16 includes the general hot water supply path 1.
Hot water supply flow rate sensor 20 for detecting the flow rate of hot water flowing through
In the hot water path 17, a hot water flow sensor 21 for detecting the flow rate of hot water flowing through the hot water path 17, a hot water electromagnetic valve 22, a vacuum breaker 23, and a hot water check valve 2
4 are provided in order from the upstream side.

When hot water is supplied to the general hot water supply passage 16, the mixing valve 8 is set so that the temperature of hot water to be supplied becomes equal to the hot water supply set temperature based on detection information of the hot water supply set temperature, the hot water outlet thermistor 13 and the water supply thermistor 9. By adjusting the opening and finely adjusting the opening of the mixing valve 8 based on the difference between the detected temperature and the set hot water supply temperature based on the detection information of the mixing thermistor 14, the hot water at the set hot water supply temperature is supplied. It is configured to be. When filling the bathtub, the bathing electromagnetic valve 22 is opened, and the hot water adjusted to the bathing set temperature by the mixing bubble 8 is supplied to the bathtub from both the bath return path 18 and the bath going path 19. When hot water is supplied to the hot water setting water level in the bathtub, the hot water electromagnetic valve 22 is closed to fill the hot water in the bathtub.
Hot water supply operation means G includes a hot water storage outlet thermistor 13, a water supply thermistor 9, a mixing valve 8, a mixing thermistor 14, a hot water filling electromagnetic valve 22, and the like.

The circulation path 3 and the hot water storage tank 1 are used for returning hot water flowing through the circulation path 3 to the hot water storage tank 1 or for taking out hot water from the hot water storage tank 1 to the circulation path 3. Are connected at a total of three locations, one at the top and two at the bottom. More specifically, an upper connection path 25 that connects the circulation path 3 and the hot water storage tank 1 is connected to the upper part of the hot water storage tank 1 via the upstream side of the hot water supply path 6, and is connected to the bottom of the hot water storage tank 1. A return path 26 for returning the hot water flowing through the circulation path 3 to the bottom in the hot water storage tank 1 via the downstream side of the water supply path 5; and a takeout path 27 for taking out the hot water from the bottom in the hot water storage tank 1 to the circulation path 3; Are connected.

An upper opening / closing valve 28 is provided in the upper connection passage 25, and a return opening / closing valve 29 is provided in the return passage 26. When the upper opening / closing valve 28 is opened, the circulation passage 3 is opened. By supplying the flowing hot or cold water to the upper portion of the hot water storage tank 1 or taking out the hot or cold water from the upper portion of the hot water storage tank 1 to the circulation path 3, the return on-off valve 29 is opened to open the circulation path 3. The flowing hot and cold water can be returned to the bottom in the hot water storage tank 1. Incidentally, a drainage channel 30 for draining hot water from the hot water storage tank 1 is connected to the takeout channel 27, and a safety valve 31 and a manual valve 32 are connected in parallel at an intermediate portion of the drainage channel 30. .

The heating means 4 supplies a heating unit 33 for heating the hot water by supplying a refrigerant from the engine heat pump type cooling and heating apparatus B, and a cooling water recovered from the engine exhaust heat of the engine heat pump type cooling and heating apparatus B. The system includes an engine exhaust heat utilization type heating unit 34 for heating hot and cold water, and an auxiliary heating unit 35 for heating hot and cold water by burning a burner 36. Then, in the circulation direction of the hot and cold water in the circulation direction, in order from the upstream side,
3. An engine exhaust heat utilization type heating unit 34 and an auxiliary heating unit 35 are provided.

The auxiliary heating section 35 is provided with a gas-fired burner 36 and a fan 37 for supplying combustion air to the burner 36. The combustion of the burner 36 heats the hot and cold water flowing through the circulation path 3. It is configured as follows.
A fuel supply path 38 for supplying a fuel gas to the burner 36 has a gas safety valve 39, a gas proportional valve 4
0, the gas main valve 41 is provided in this order, and the auxiliary heating unit 35 is provided with a water amount sensor 64 for detecting the flow rate of hot water flowing through the auxiliary heating unit 35. Incidentally, when the water amount sensor 64 detects a water amount equal to or greater than the set amount, the auxiliary heating unit 35 starts the combustion of the burner 36, and based on the detection information of the incoming temperature thermistor 61 and the water amount sensor 64, the fan 37 The rotation speed and the opening of the gas proportional valve 40 are adjusted to adjust the temperature of the hot and cold water heated by the auxiliary heating unit 35.

The external heat dissipating section 2 includes a heating heat dissipating section 42 for exchanging heat between hot water (corresponding to hot water for a heat source) flowing through the circulation path 3 and hot water as a heating heat medium, The bath radiator 43 is configured to exchange heat between hot and cold water flowing through the bath (corresponding to hot water for a heat source) and hot and cold water in the bathtub and reheat the bath. The circulation path 3 is branched into a heating circulation path 3a having a heating heat radiation section 42 and a bath circulation path 3b having a bath heat radiation section 43, and the heating heat radiation section 42 and the bath heat radiation section. 43 are connected in parallel. The heating circulation path 3a is provided with a heating opening / closing valve 44 on the upstream side of the heating radiator 42 in the direction of circulation of the hot water, and the bath circulation path 3b is provided with a hot water radiator rather than the bath radiator 43. A bath on-off valve 45 is provided on the upstream side in the circulation direction.

The heating radiator 42 includes a heating pump P2.
, The heat medium circulating through the heating return path 46 and the heating outgoing path 47 is heated by the hot and cold water flowing through the circulation path 3. The heating return path 46 is provided with a heating return thermistor 48 for detecting the temperature of the heating medium in the heating return path 46, a makeup water tank 49, and a heating pump P2 in order from the upstream side in the circulation direction of the heating medium,
The heating going path 47 is provided with a heating going thermistor 50 for detecting the temperature of the heat medium in the heating going path 47, and the heating operation means J is constituted by a heating return thermistor 48, a heating pump P2, and the like.

The make-up water tank 49 has an upper limit sensor 51 for detecting the upper limit of the water level and a lower limit sensor 5 for detecting the lower limit.
2, a tank water supply passage 53 for supplying water to the makeup water tank 49 is connected, and the makeup water supply passage 53 is provided with a makeup water solenoid valve 54. Further, a heating bypass passage 55 is provided, which supplies the heat medium from the heating return passage 46 to the heating outgoing passage 47 by bypassing the heating radiator 42.

The bath radiator 43 is provided with a bath pump P3.
Is operated, the hot water in the bath tub circulating through the bath return path 18 and the bath going path 19 is heated by the hot water flowing through the circulation path 3. Therefore, the bathtub hot-water circulation means H is constituted by the bath return path 18, the bath going path 19, and the bath pump P3. The bath return path 18 has a water level sensor 5 for detecting the level of hot water in the bathtub in order from the upstream side in the circulation direction of hot water in the bathtub.
6. A bath return thermistor (corresponding to bath temperature detection means) 57 for detecting the temperature of bath water in the bath return path 18, a two-way valve 58, a bath pump P3, and a bath water flow switch 59 are provided to operate the bath pump P3. Then, the hot water in the bath tub is circulated in the bath return path 18 and the bath outgoing path 19, and is additionally heated while being heated in the bath radiator 43.

The circulation path 3 is provided with a take-off opening / closing valve 60 for taking out hot water from the hot water storage tank 1 to the circulation path 3 through the take-out path 27 upstream of a connection point with the take-out path 27 in the direction of circulation of hot water. Is provided, between the engine exhaust heat utilization type heating unit 34 and the auxiliary heating unit 35, an incoming temperature thermistor 61 for detecting the temperature of the hot water flowing through the auxiliary heating unit 35, and the hot water flowing through the circulation path 3 A circulation flow rate sensor 62 for detecting a circulation flow rate, a circulation pump P1, and an auxiliary intermittent on-off valve 63 for intermittently supplying hot water to the auxiliary heating unit 35
Is provided. A circulation water proportional valve 65 for adjusting the circulation flow rate of hot and cold water flowing through the circulation path 3 and the heating means 4 are provided between the auxiliary heating section 35 and the connection point of the upper connection path 25 in the circulation path 3. A hot water storage thermistor 66 for detecting the temperature of hot water in the circulation path 3 after being heated is provided.

The circulation path 3 has a heat pump bypass for bypassing the upstream side in the circulation direction of the hot and cold water with respect to the discharge opening / closing valve 60 and between the heating section 33 utilizing the heap refrigerant and the heating section 34 utilizing the engine exhaust heat. A road 67 is provided,
The heat pump bypass on-off valve 69 provided in the heat pump bypass passage 67 is opened, hot water flows through the heat pump bypass passage 67, and the hot water is circulated around the heating unit 33 utilizing the heater refrigerant. .
Further, an auxiliary bypass 68 for circulating hot water by bypassing the auxiliary heating unit 35 is provided between the circulation pump P1 and the auxiliary intermittent on-off valve 63 in the circulation path 3 and between the auxiliary heating unit 35 and the circulation water. The auxiliary bypass passage 68 is provided with an auxiliary bypass opening / closing valve 70 so as to bypass the valve 65.

In this manner, the take-out on-off valve 60, the upper on-off valve 28, the return on-off valve 29, the auxiliary intermittent on-off valve 6
3. By controlling the opening and closing of each of the heat pump bypass on-off valve 69 and the auxiliary bypass on-off valve 70, the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heating means 4, and the hot water is stored in the hot water storage tank 1. The circulation path 3 is circulated so as to return to the upper portion, or to heat the hot and cold water by the heating means 4, pass through the external heat radiation part 2, and then return to the heating means 4. That is, the hot-water circulation means E for the heat source includes the circulation path 3, the circulation pump P <b> 1, the take-out on-off valve 60, the upper on-off valve 28, the return on-off valve 29, the auxiliary intermittent on-off valve 63, the heat pump bypass on-off valve 69,
It is constituted by a plurality of on-off valves such as an auxiliary bypass on-off valve 70.

The circulation flow rate in the circulation path 3 is adjusted by adjusting the opening of the circulation water proportional valve 65 based on the detection information of the circulation flow sensor 62. The temperature of the hot and cold water flowing through the circulation path 3 after being heated by the heating means 4 is adjusted by adjusting the circulation flow rate in the circulation path 3 and the heating amount in the auxiliary heating section 35 based on the configuration, The circulation adjusting means F includes a circulation flow sensor 62, a water proportional valve 65 for circulation, a hot water storage thermistor 66, and the like.

[0027] The engine heat pump type cooling and heating apparatus B
As shown in FIG. 2, a plurality of indoor units 71 and outdoor units 7
2, a heat pump operation control unit D that controls the operation of the indoor unit 71 and the outdoor unit 72, and is configured to be capable of air-conditioning a plurality of air-conditioned spaces (for example, each room). Further, the indoor unit 71, the outdoor unit 72, and the heating unit 33 using the heap refrigerant in the hot water storage unit A
The refrigerant in the engine heat pump type cooling / heating device A is connected to the refrigerant pipe 73 so that the refrigerant can be supplied to the heating unit 33 using the heapon refrigerant.

Each of the plurality of indoor units 71 is provided with an electronic expansion valve 74, an indoor heat exchanger 75, and an indoor air-conditioning blower 76 for sending out the air temperature-controlled by the indoor heat exchanger 75 to the space to be air-conditioned. The opening degree of the electronic expansion valve 74 is adjusted based on the detection information of the refrigerant thermistor 89 that detects the temperature of the refrigerant condensed in the indoor heat exchanger 75. The outdoor unit 72 includes a gas engine 77, a compressor 7
8, accumulator 79, four-way valve 80, outdoor heat exchanger 8
1. An outdoor air-conditioning blower 82 that ventilates outside air to the outdoor heat exchanger is provided, and a radiator 83, a radiator blower 84 for radiating exhaust heat of the gas engine 77 to the outside, and an outside air temperature are detected. An outside air temperature sensor 91 as an outside air temperature detecting means is also provided. The heat pump operating means K includes the electronic expansion valve 74 and the indoor air-conditioning blower 7.
6, a gas engine 77, a compressor 78, a four-way valve 80, an outdoor air-conditioning blower 82, and the like.

A cooling water passage 85 for circulating cooling water for cooling the gas engine 77 with the radiator 83 is provided, and the cooling water passage 85 is provided with a radiator pump P.
4 is provided, and the cooling water that has recovered the exhaust heat of the gas engine is
The heating unit 34 utilizing the engine exhaust heat through the heating supply path 90
The exhaust heat switching mechanism 86 is provided so as to be switchable between a heating state in which the heat is supplied to the radiator 83 and an exhaust heat state in which the heat is supplied to the radiator 83 and exhausted. The cooling water circulating means L includes a radiator pump P4, a waste heat switching mechanism 86, a radiator blower 84, and the like.

The operation of the engine heat pump type cooling / heating device B is controlled by the heat pump operation control section D based on a command from the air conditioning remote control R1.
, The air conditioner cooling operation and the air conditioning heating operation can be selectively switched by the switching operation of the four-way valve 80, and the opening and closing control of the electronic expansion valve 74 of the indoor unit 71 allows the room having the air conditioning request to be operated. It is configured to perform air conditioning. When heating the hot water in the circulation path 3 by the heating refrigerant utilizing heating unit 33, the air conditioning and heating operation is performed, and the electronic expansion valve 74 is controlled to supply the refrigerant to the heating refrigerant utilizing heating unit 33. ing.

In the air-conditioning / cooling operation, the indoor heat exchanger 75 functions as an evaporator to control the temperature of the air supplied to the space to be air-conditioned, and the outdoor heat exchanger 81 functions as a condenser to provide outside air. The heat is dissipated. In the air-conditioning / cooling operation, the rotation speed for detecting the rotation speed of the gas engine 77 based on the detection information of the low-pressure detection means 87 for detecting the pressure of the low-pressure refrigerant so that the detected pressure becomes the target pressure for cooling. The rotation speed of the gas engine 77 is controlled based on the detection information of the sensor 77a. Further, in the air-conditioning / cooling operation, the hot water flowing through the circulation path 3 is heated by the engine exhaust heat utilizing heating unit 34 by switching the exhaust heat switching mechanism 86 to the heating state.

The flow of the refrigerant in the air-conditioning / cooling operation will be further described. As shown by the solid arrows in FIG. 2, the high-pressure dry vapor refrigerant discharged from the compressor 78 is supplied to the four-way valve 8.
The heat is supplied to the outdoor heat exchanger 81 through the heat exchanger 0, and is condensed in the outdoor heat exchanger 81 by heat exchange with the outside air. Then, the refrigerant that has passed through the condensation step and is sent from the outdoor heat exchanger 81 is supplied to the indoor heat exchanger 75 via the electronic expansion valve 74, and is evaporated by the heat exchange with the air to be cooled in the indoor heat exchanger 75. You. Thereafter, the low-pressure dry vapor refrigerant sent from the indoor heat exchanger 75 is returned to the suction port of the compressor 78 via the four-way valve 80 and the accumulator 79.

In the air-conditioning and heating operation, the indoor heat exchanger 75 functions as a condenser to heat and control the temperature of the air supplied to the space to be air-conditioned, and the outdoor heat exchanger 81 functions as an evaporator to remove air from the outside air. It absorbs heat. In this air-conditioning and heating operation, gas is detected on the basis of the detection information of the high-pressure detection means 88 for detecting the pressure of the refrigerant on the high-pressure side, and based on the detection information of the rotation speed sensor 77a such that the detected pressure becomes the heating target pressure. The rotation speed of the engine 77 is controlled. In this air-conditioning / heating operation, hot water flowing through the circulation path 3 is heated by supplying a high-pressure refrigerant to the heating heater 33 using the refrigerant through the refrigerant pipe 73.

The flow of the refrigerant in the air-conditioning / heating operation will be further described. As shown by a dotted arrow in FIG. 2, the high-pressure dry vapor refrigerant discharged from the compressor 78 is supplied to the four-way valve 8.
0, is supplied to the indoor heat exchanger 75 and the heating unit using the heap refrigerant 33, and is condensed by heat exchange with the air to be heated in the indoor heat exchanger 75. It is condensed by heat exchange with hot water. Then, the refrigerant passing through the condensing step, which is sent from the indoor heat exchanger 75 and the heapon refrigerant utilization heating unit 33,
The air is supplied to the outdoor heat exchanger 81 via the electronic expansion valve 74, and is evaporated by heat exchange with the outside air in the outdoor heat exchanger 81. Thereafter, the low-pressure dry vapor refrigerant delivered from the outdoor heat exchanger 81 is returned to the suction port of the compressor 78 via the four-way valve 80 and the accumulator 79.

The hot water storage unit controller C and the heat pump operation controller D are configured to be able to transmit and receive control signals.
Hot water storage unit control unit C and heat pump operation control unit D
The control means U is constituted by these. As the control signal, a signal transmitted from the heat pump operation control unit D and indicating that the engine heat pump cooling / heating device B is operating in air conditioning (hereinafter, may be referred to as an air conditioning operation signal), and the hot water storage unit control unit C, there are signals such as a drive request for the engine heat pump type cooling / heating device B (hereinafter, may be referred to as a heat pump drive request), an air conditioning exhaust heat request, and the like. Then, as shown in FIG. 3, the hot water storage unit control unit C and the heat pump operation control unit D control the air conditioning remote control R installed in each room as the air conditioning target space.
1, an air-conditioning operation such as an air-conditioning cooling operation and an air-conditioning / heating operation for a space to be air-conditioned, a hot-water storage operation for storing hot water in the hot-water storage tank 1, and a heat-dissipation operation for dissipating heat in the external heat-dissipating unit 2 based on a command from the hot-water storage remote controller R2. When the hot water storage amount in the hot water storage tank 1 is less than the minimum secured amount, each operation such as a hot water supply priority operation for supplying hot water is performed. The heat dissipation operation includes a reheating operation performed when only a reheating request is made, a heating operation performed when only a heating request is made, a heating operation performed when a reheating request and a heating request are made. There is a simultaneous reheating operation, and the reheating operation includes a heating unit automatic selection operation mode and an auxiliary heating unit independent operation mode.

The engine heat pump type cooling / heating device B
When the air-conditioning remote controller R1 receives an air-conditioning request such as an air-conditioning cooling request or an air-conditioning / heating request, the heat pump operation control unit D controls the operation of the heat pump operation unit K and the cooling water circulation unit L, and The compressor 78 is operated by the gas engine 77 based on the air conditioning request, and the air conditioner cooling operation and the air conditioning heating operation are selectively switched by the switching operation of the four-way valve 80, and the indoor unit 71 is operated.
By controlling the opening and closing of the electronic expansion valve 74, air conditioning to each air conditioning target space is switched, and the heat pump operating means K is controlled. That is, when the air-conditioning remote controller R1 issues an air-conditioning / cooling request, the heat pump operation control unit D operates the electronic expansion valve 74 corresponding to the room for which the air-conditioning / cooling request is made.
Is opened, the indoor heat exchanger 75 functions as an evaporator, the supply air to the space to be air-conditioned is cooled, and the outdoor heat exchanger 81 functions as a condenser to radiate heat to the outside air. Thus, the air-conditioning / cooling operation is executed by controlling the heat pump operating means K. Further, when there is an air-conditioning / heating request from the air-conditioning remote control R1, the heat pump operation control unit D opens the electronic expansion valve 74 corresponding to the room where the air-conditioning / heating request is made, and causes the indoor heat exchanger 75 to function as a condenser. Then, the air-conditioning / heating operation is executed by controlling the heat pump operating means K so that the temperature of the air supplied to the space to be air-conditioned is controlled and the outdoor heat exchanger 81 functions as an evaporator to absorb heat from the outside air. Further, when the heat pump driving request signal is transmitted from the hot water storage unit control unit C while the engine heat pump cooling / heating device B is stopped, the heat pump operation control unit D controls the heat pump operation unit K to perform the air conditioning / heating operation. Execute.

The cooling water circulating means L activates the radiator pump P4, activates the radiator blower 84 and causes the radiator 83 to radiate heat during the air-conditioning and cooling operation. When the heat pump operation control unit D receives the air conditioning exhaust heat request signal from the hot water storage unit control unit C, the heat pump operation control unit D uses the engine exhaust heat utilization type when the cooling water flowing through the cooling water passage 85 is at or above the heating set temperature. When heating can be performed by the heating unit 34, the exhaust heat switching mechanism 86 is switched to the heating state, and the cooling water is supplied to the engine exhaust heat utilizing heating unit 34. In the air conditioning and heating operation, the radiator pump P4 is operated, the radiator blower 84 is operated, and the radiator 83 releases heat. When the heat pump operation control unit D receives the air conditioning exhaust heat request signal from the hot water storage unit control unit C, the heating load is small, and when the cooling water flowing through the cooling water passage 85 is equal to or higher than the set temperature for heating. The engine exhaust heat utilizing heating unit 34
When the heating can be performed by the engine, the exhaust heat switching mechanism 86 is switched to the heating state, and the cooling water is supplied to the engine exhaust heat utilizing heating unit 34.
To supply it.

Next, the operation of the hot water storage unit A will be described. From the hot water storage remote control R2, hot water storage operation, heating operation,
A reheating operation in the heating unit automatic selection operation mode, a reheating operation in the auxiliary heating unit independent operation mode, and the like are instructed. Based on a request command from the hot water storage remote control R2 and the like, the hot water storage unit control unit C drives the heat pump. The transmission of the request signal and the air conditioning exhaust heat request signal is controlled, and the hot water circulation means E, the circulation adjustment means F, the hot water supply operation means G, the bath water circulation means H, the heating operation means J, and the auxiliary heat exchange section 35 are controlled. By controlling each operation, hot water storage operation, hot water supply priority operation, heating operation,
Each operation such as a reheating operation in the heating unit automatic selection operation mode and an additional heating operation in the auxiliary heating unit independent operation mode is performed.

The hot water storage unit control section C has a refrigerant pressure availability determination condition for determining whether the refrigerant pressure of the engine heat pump type cooling / heating device B is lower than a set pressure based on the outside air temperature and the bathtub water temperature in advance. Based on the outside air temperature and the bathtub hot water temperature, is the heating efficiency of heating the bathtub hot water by the heater-refrigerant heating unit 33 using the refrigerant of the engine heat pump air conditioner B greater than the heating efficiency of heating the bathtub hot water by the auxiliary heating unit 35? Whether the efficiency determination conditions for determining whether or not the heating is satisfied, and whether the heating by the heater-coolant-using heating unit 33 satisfies the expected boiling time set to be longer as the temperature of the bath water at the start of the heating is lower. The condition for judging whether or not the heating time is possible for judging whether or not the heating is started from the temperature of the bath water at the start of heating and the temperature of the outside air is stored.

When the additional heating operation in the heating unit automatic selection operation mode is requested, the hot water storage unit control unit C detects the outside air temperature detected by the outside air temperature sensor 91, the detected bath water temperature of the bath return thermistor 57, Based on the refrigerant pressure availability determination condition, the efficiency availability determination condition, and the boiling time availability determination condition, whether the refrigerant pressure of the engine heat pump type cooling / heating device B is lower than a set pressure, the heating efficiency by the heapon refrigerant utilization heating unit 33 is determined. It is determined whether the heating efficiency of the auxiliary heating unit 35 exceeds the heating efficiency and whether the heating by the heating-refrigerant-using heating unit 33 satisfies the expected boiling time, and the refrigerant pressure of the engine heat pump cooling / heating device B is set to the set pressure. (Hereinafter sometimes abbreviated as a low refrigerant high pressure state), the heating efficiency of the heating unit 33 utilizing the heapon refrigerant is compensated. A state where the heating efficiency by the heating unit 35 is exceeded (hereinafter, may be abbreviated as a high heating efficiency heating state), and a state where the heating by the heating unit 33 using the heapon refrigerant satisfies the expected heating time (hereinafter, the heating time). When all three of the three conditions are satisfied, the operation of the engine heat pump type cooling / heating device B, that is, the heating by the heating refrigerant utilization heating unit 33 is determined to be possible. If even one of the above is not satisfied, it is determined that the operation of the engine heat pump type cooling / heating device B, that is, the heating by the heating / refrigerant-using heating unit 33 is not possible.

Then, the hot water storage unit control section C determines that heating by the heating water heater 33 is possible, and
When the air-conditioning operation in-progress signal is not transmitted from the heat pump operation control unit D, a heat pump drive request signal is transmitted to operate only the engine heat pump cooling / heating device B, and it is determined that heating by the heating refrigerant utilizing heating unit 33 is permitted. However, when the air-conditioning operation signal is being transmitted from the heat pump operation control unit D,
When it is determined that the heating by is not possible, only the auxiliary heating unit 35 is operated.

The hot water storage unit control section C operates only the auxiliary heating section 35 when the additional heating operation in the auxiliary heating section independent operation mode is required.

The conditions for judging the refrigerant pressure are indicated by a line Lp in FIG. 9, and the conditions for judging the efficiency are indicated by a line Le in FIG.
As a condition for determining whether or not the boiling time is possible, a line L in FIG.
The condition indicated by t is stored using map data, an approximate expression, and the like.

The set pressure is set to the upper limit value of the high pressure of the refrigerant, and the condition for judging whether or not the refrigerant pressure is high is that the outside air temperature at which the engine heat pump type cooling and heating apparatus B can be operated while maintaining the high pressure of the refrigerant at or below the set pressure. And the condition of the bathtub hot and cold water temperature. In FIG.
On the other hand, the region on the side where the outside air temperature is low is a region in a low refrigerant high pressure state.

The condition for judging whether or not the efficiency is applicable is to re-fire the set amount of hot and cold water in the bathtub to the re-heating set temperature.
The heating efficiency when the heating is performed in the heating unit 33 using the heapon refrigerant (divided by the energy amount of only the gas having the heating capacity) and the heating efficiency when heating in the auxiliary heating section 35 (similarly, the heating capacity is It is calculated by differentiating the outside air temperature at the start of additional heating and the temperature of the bathtub water at the start of additional heating, and the heating efficiency of the heating unit 33 using the heapon refrigerant is increased. Auxiliary heating unit 3
The conditions of the outside air temperature at the start of the additional heating and the temperature of the bathtub water at the start of the additional heating are determined so as to exceed the heating efficiency according to 5. Incidentally, the relationship between the heating efficiency by the heater-coolant utilization heating unit 33, the outside air temperature at the start of additional heating, and the bathtub water temperature at the start of additional heating is, for example, as shown in FIG. The heating efficiency is considered to be substantially constant at, for example, about 0.8 regardless of the outside air temperature and the bathtub water temperature. FIG. 9 shows a condition in which the heating efficiency of the heating unit 33 using the heapon refrigerant and the heating efficiency of the auxiliary heating unit 35 are compared based on the outside air temperature at the start of additional heating and the bathtub water temperature at the start of additional heating. , A region where the outside air temperature is high with respect to the line Le is a region in a high hepon heating efficiency state.

The condition for judging whether or not the boiling time is possible is that the time required for the additional heating at the time of heating the heating water in the heating water heater 33 by the heating unit 33 for the additional heating of the set amount of hot water in the bathtub to the additional heating set temperature. Estimate by making the outside air temperature at the start of additional heating and the bathtub water temperature at the start of additional heating different.
Based on the estimated reheating time and the expected heating time that is set to be longer as the temperature of the bathtub at the start of reheating decreases, for example, as shown in FIG. The conditions of the outside air temperature at the start of reheating and the temperature of the bathtub water at the start of reheating are determined so as to be shorter than the expected time. Then, the condition for comparing the time for the reheating plant with the expected heating time by the outside air temperature at the start of the reheating and the bathtub water temperature at the start of the reheating is shown by a line Lt in FIG. 9. The region on the side where the outside air temperature is higher than the line Lt is a region where the boiling time is less than the expected boiling time and the boiling time is less than the expected time.

Therefore, in FIG. 9, the hatched area indicates the outside air temperature at the start of reheating and the temperature at the start of reheating that satisfy all of the three states of the low refrigerant high pressure state, the high heating efficiency heating state, and the boiling time satisfaction state. It is the area of bath water temperature.

The hot water circulating means E for heat source will be described in detail. The hot water circulating means E for heat source, when storing hot water in the hot water storage tank 1, has two states, a hot water storage state as a hot water storage operation and an initial hot water storage state. When the heat is radiated by the external heat radiating unit 2, the HP heating and reheating circulating state for performing the reheating operation only by the heating refrigerant utilizing heating unit 33, and the auxiliary heating unit 35 only performs the additional heating. It is configured to be able to switch to each of four states of an auxiliary heating additional heating circulation state for performing the heating operation, a heating circulation state, and a simultaneous heating and additional heating circulation state. In addition, when the amount of hot water stored in hot water storage tank 1 is less than the minimum secured amount, when hot water is supplied to general hot water supply path 16, it is configured to switch to the hot water supply priority state.

When hot water is stored in the hot water storage tank 1, when the temperature of the hot water heated by the heating unit 33 is less than the hot water storage allowable temperature, the hot water storage is switched to the initial state of hot water storage and the hot water in the hot water storage tank 1 is switched to the initial state. When the temperature of the hot water heated by the heater-coolant-using heater 33 reaches the hot-water storage allowable temperature, the hot-water storage state is switched to the hot-water storage state and hot water is stored in the hot-water storage tank 1. In addition, when heat is radiated by the external heat radiating unit 2, there is a request for only the additional heating, and when the additional heating is performed only by the heating unit 33 using the heapon refrigerant, the state is switched to the HP heating additional heating circulation state, and the additional heating request is issued. Only when the auxiliary heating is performed only by the auxiliary heating unit 35, switching to the auxiliary heating additional heating circulation state is performed, and when there is a request for only the heating request, switching to the heating circulation state is performed.
When both a reheating request and a heating request are made, the state is switched to the simultaneous circulation state of heating and reheating.

Hereinafter, each state of the hot water circulation means E for a heat source will be described. In addition, in the description of each state of the hot water circulation means E for the heat source, the upper opening / closing valve 2
8, return on-off valve 29, take-off on-off valve 60, heat pump bypass valve 69, auxiliary intermittent on-off valve 63, auxiliary bypass on-off valve 70, heating on-off valve 44, and bath on-off valve 4
As for the open / close state of 5, only the open / close valves to be opened are described, and the open / close valves not described are closed.

In the hot water storage state, the auxiliary bypass valve 70 and the upper opening / closing valve 28 are opened, and the circulation pump P1 is operated, so that the hot water forms a temperature stratification in the hot water storage tank 1 to store the hot water. After the hot and cold water taken out from the bottom of the tank 1 is heated by the heating unit 33 using a heap refrigerant, the hot water is returned to the upper part of the hot water storage tank 1 by bypassing the auxiliary heating unit 35. In the hot water storage initial state, the auxiliary bypass valve 70, the heating on-off valve 44
After opening the return on-off valve 29 and operating the circulation pump P1 to heat the hot and cold water taken out from the bottom of the hot water storage tank 1 by the heating water heater 33,
The hot water bypasses the auxiliary heating section 35 and returns to the bottom of the hot water storage tank 1.

In the above-mentioned circulating state of the HP heating and additional heating,
The opening / closing valve 60, the auxiliary bypass opening / closing valve 70 and the bath opening / closing valve 45 are opened, and the circulation pump P1 is opened.
As shown in FIG. 1, as shown in FIG. 1, the entire amount of the hot water heated by the heating water heater 33 is bypassed to the auxiliary heating unit 35 and passed through the bath heating unit 43, so that the bath heating unit 43 Then, the entire amount is returned to the heating unit 33 using the heapon refrigerant.

In the above-described auxiliary heating and reheating circulation state,
Heat pump bypass on-off valve 69, auxiliary intermittent on-off valve 6
3 and the on-off valve 45 for the bath are opened, and the circulation pump P1 is operated to allow the entire amount of the warm water heated by the auxiliary heating unit 35 to pass through the radiating unit 43 for the bath, as shown in FIG. After the heat is radiated by the bath radiator 43, the entire amount is returned to the auxiliary heater 35 by bypassing the heating unit 33 utilizing the heater refrigerant.

In the simultaneous circulation state of heating and reheating, the heat pump bypass on-off valve 69, the auxiliary intermittent on-off valve 63, the bath on-off valve 45, and the heating on-off valve 44 are opened, and the circulation pump P1 is operated. As shown in FIG. 5, the entire amount of warm water heated by the auxiliary heating unit 35 is distributed and supplied to the bath heat radiating unit 43 and the heating heat radiating unit 42 to radiate heat. It is designed to bypass the 33 and return to the auxiliary heating section 35.

In the heating circulation state, the heat pump bypass on-off valve 69, the auxiliary intermittent on-off valve 63, and the heating on-off valve 44 are opened, and the circulation pump P1 is opened.
Is operated to supply the entire amount of the warm water heated by the auxiliary heating unit 35 to the heating radiating unit 42 to radiate heat, and then return the entire amount to the auxiliary heating unit 35 by bypassing the heating unit 33 using the heater refrigerant. Like that.

In the hot water supply priority state, the auxiliary intermittent on-off valve 63 and the upper on-off valve 28 are opened, the circulating pump P1 is operated, and the hot water heated by the auxiliary heating unit 35 is supplied to the hot water supply path 6. I am trying to do it. In the hot water supply priority state, when heating can be performed by the heating-refrigerant heating unit 33, the engine heat pump cooling / heating device B may be operated for air conditioning and heating to supply the refrigerant to the heating-refrigerant heating unit 33. .

As the operation of the hot water storage unit control section C,
The hot water storage operation, the heat radiation operation, and the hot water supply priority operation will be described. The hot water storage unit controller C executes the hot water storage operation when there is a hot water storage request, and executes the heat radiation operation regardless of the presence or absence of the hot water storage request when there is a heat release request. If a hot water supply request is issued when the amount is less than the minimum reserved amount as the hot water storage amount, the hot water supply priority operation is executed regardless of the presence or absence of the heat radiation request. That is, the priority order of the operations to be executed among the hot water storage operation, the heat radiation operation, and the hot water supply priority operation is in the order of the hot water supply priority operation, the heat radiation operation, and the hot water storage operation.

In the hot water storage operation, when a hot water storage request is issued as a heating request, the engine heat pump type cooling / heating device B is operated to cause the hot water circulation means E for the heat source to perform the hot water storage operation.
It is configured to execute the hot water storage operation. More specifically, the HP hot water storage operation will be described. First, the air conditioning and heating operation is performed by using the engine heat pump type cooling / heating device B as a heating operation to supply the high-pressure refrigerant to the heating-refrigerant-using heating unit 33, and the hot-water circulating means E for the heat source is stored. The heating operation is performed in the initial state, and the hot water is heated by the heating unit 33 utilizing the heap refrigerant in a state where the hot water taken out from the bottom of the hot water storage tank 1 is returned to the bottom of the hot water storage tank 1. Then, when the temperature detected by the hot water storage thermistor 66 becomes equal to or higher than the allowable hot water storage temperature, the hot water circulation means E is switched from the initial state of hot water storage to the hot water storage state, and is taken out from the bottom of the hot water storage tank 1 and the hot water is removed from the upper part of the hot water storage tank 1. The circulation water proportional valve is heated based on the detection information of the hot water storage thermistor 66 so that the heating water is heated by the heating water heater 33 in a state where the hot water is stored in the upper portion of the hot water storage tank 1. The opening degree of 65 is adjusted.

In this way, the hot water in the hot water storage tank 1 is stored while forming a temperature stratification, and when the hot water storage quantity of the hot water storage tank 1 reaches the target hot water storage quantity set by the hot water storage remote control R2 or the like, the set time hot water storage tank 1 is set. After the hot water has been stored, the operation of the engine heat pump cooling / heating device B is stopped, the operation of the circulation pump P1 is stopped, and the open / close valve is closed to open the hot water circulation means E for heat source.
Stop the operation of. By the way, the target hot water storage is
One of “small”, “medium”, and “full” can be selected. For example, when “medium” is selected as the target hot water storage amount, the central thermistor S3 sets the temperature lower by the set temperature than the hot water storage set temperature. Upon detection, it is detected that the hot water storage amount of the hot water storage tank 1 has reached the target hot water storage amount.

In the heat dissipation operation, when there is a request only for a reheating operation in the heating unit automatic selection operation mode, the reheating operation in the heating unit automatic selection operation mode is executed, and the reheating operation in the auxiliary heating unit independent operation mode is performed. When there is a request only for the heating request, the additional heating operation in the auxiliary heating unit independent operation mode is executed, and when there is a request only for the heating request, the heating operation is executed, and both the additional heating request and the heating request are issued. And a simultaneous heating and reheating operation.

The reheating operation in the heating unit automatic selection operation mode will be specifically described. When the reheating operation in the heating unit automatic selection operation mode is commanded, the detected water level of the water level sensor is read and the reading detection is performed. The water level is checked to be higher than the set water level (therefore, when the detected water level is lower than the set water level, the bath is filled with water until the water level detected by the water level sensor reaches the set water level), and the bath pump P3 is operated to turn the bath pump into the bathtub. The bath water is circulated through the bath return path 18 and the bath outgoing path 19, and as described above, the outside air temperature detected by the outside air temperature sensor 91, the bath tub water temperature detected by the bath return thermistor 57, the refrigerant pressure propriety determination condition, and the efficiency propriety. The operation of the engine heat pump type cooling / heating device B, that is, the heating of the heating unit 33 using the heapon refrigerant, is performed based on the determination conditions and the conditions for determining whether the boiling time is possible. It determines whether, when the determination result is Yes, and, when the engine heat pump type cooling and heating apparatus B is not in the air conditioning operation, HP hot water circulation means E for the heat source
While switching to the heating additional heating circulation state, the air conditioning and heating operation of the engine heat pump type cooling and heating device B is performed so that the detected temperature of the hot water storage thermistor 66 becomes the set temperature for heat release.
The heap-on heating and reheating operation for adjusting the opening degree of the water proportional valve 65 is performed. On the other hand, when the operation of the engine heat pump type cooling and heating device B is not possible, the heat source water / water circulation means E is set to the auxiliary heating and reheating heating circulation state. At the same time, the auxiliary heating unit 35 is operated, and the rotation speed of the fan 37 and the opening of the gas proportional valve 40 are adjusted so that the temperature detected by the hot water storage thermistor 66 becomes the set temperature for heat radiation. Execute

During the heat-on-heating additional heating operation,
Based on the outside air temperature detected by the outside air temperature sensor 91 and the bathtub hot water temperature detected by the bath return thermistor 57, it is monitored whether or not the refrigerant pressure of the engine heat pump cooling / heating device B exceeds the set pressure, and the refrigerant pressure exceeds the set pressure. And, while stopping the engine heat pump type cooling and heating device B,
The hot water circulation means E for the heat source is switched to the auxiliary heating and reheating mode, and the auxiliary heating unit 35 is operated to switch to the auxiliary heating and reheating mode.

When the bath tub water is heated and refired in the bath heat radiating section 43, when the temperature detected by the bath return thermistor 57 becomes higher than the reheating set temperature, the operation of the bath pump P3 is stopped and the engine heat pump is stopped. When the cooling / heating device B is operating, it is stopped, when the auxiliary heating unit 35 is operating, it is stopped, and the operation of the hot water circulation unit E for heat source is stopped, and the heat radiation stop processing is performed. Execute

Therefore, the outside air temperature at the start of reheating and the temperature of the bath water at the start of reheating are determined by the heating unit 3 using the heapon refrigerant.
3, the heating efficiency by the auxiliary heating unit 35 exceeds the heating efficiency by the auxiliary heating unit 35, and when the heating by the heapon refrigerant utilizing heating unit 33 is within the range that satisfies the expected boiling time, the refrigerant high pressure is maintained at or below the upper limit, When the engine heat pump type cooling / heating device B is appropriately operated without being overloaded, and the refrigerant high pressure cannot be maintained below the upper limit,
Alternatively, when the heating efficiency of the heating-coolant-using heating unit 33 is less than or equal to the heating efficiency of the auxiliary heating unit 35, or when the heating by the heating-coolant-using heating unit 33 is in a range where the expected boiling time cannot be satisfied, the engine Without operating the heat pump type cooling / heating device B, the auxiliary heating unit 35
To drive.

More specifically, the reheating operation in the auxiliary heating unit independent operation mode will be specifically described. When the reheating operation in the auxiliary heating unit independent operation mode is commanded, the detected water level of the water level sensor is read and the reading detection is performed. The state where the water level is equal to or higher than the set water level is confirmed (therefore, when the detected water level is lower than the set water level, the bath is filled with water until the water level detected by the water level sensor reaches the set water level). Hot water is circulated through the bath return path 18 and the bath outflow path 19 to execute the auxiliary heating reheating operation. When the temperature of the bath return thermistor 57 is equal to or higher than the reheating set temperature, the operation of the bath pump P3 is stopped, and the auxiliary heating unit 35 is activated. The heat radiation stop processing is executed by stopping the operation and stopping the operation of the hot water circulation unit E for heat source.

The heating operation in the heat radiating operation will be specifically described. The hot water circulating means E for the heat source is switched to the heating circulating state, and the rotation of the fan 37 is adjusted so that the temperature detected by the hot water storage thermistor 66 becomes the set temperature for heating. The speed and the opening of the gas proportional valve 40 are adjusted, and the heating pump P2 is operated to circulate the heat medium from the heating terminal through the heating return path 46 and the heating going path 47. Is heated and supplied to the heating terminal.

The simultaneous operation of heating and reheating in the heat dissipation operation will be specifically described.
Is switched to the heating / additional heating simultaneous circulation state, and the rotation speed of the fan 37 and the opening degree of the gas proportional valve 40 are adjusted so that the temperature detected by the hot water storage thermistor 66 becomes the heating / additional heating simultaneous setting temperature. The bath pump P3 is operated to circulate the hot water in the bathtub through the bath return path 18 and the bath going path 19, and the heating pump P2 is operated to transfer the heat medium from the heating terminal to the heating return path 46 and the heating going path 47. Circulate through. Then, the hot water in the bathtub is additionally heated, and the heating medium heated by the heating radiator 42 is supplied to the heating terminal.

In the hot water supply priority operation, the hot water circulation means E is switched to the hot water supply priority state, the auxiliary heating unit 35 is operated, and the hot water heated by the auxiliary heating unit 35 is supplied from the upper connection path 25 to the hot water supply path 6. While adjusting the opening of the mixing valve 8 based on the hot water supply set temperature, the hot water outlet thermistor 13 and the water supply thermistor 9 based on the detection information, so that the temperature of the hot water becomes the hot water supply set temperature.
On the basis of the detection information of the mixing thermistor 14, the opening degree of the mixing valve 8 is finely adjusted based on the deviation between the detected temperature and the hot water supply set temperature, thereby supplying hot water at the hot water set temperature.

By the way, when filling the bathtub with hot water,
Hot water stored in the hot water storage tank 1 is supplied to the hot water supply path 6, and the temperature of hot water to be supplied based on detection information of the hot water setting temperature, the hot water storage outlet thermistor 13 and the water supply thermistor 9, similarly to the hot water supply priority operation. The opening of the mixing valve 8 is adjusted so that the temperature of the mixing valve 8 becomes equal to the filling temperature, and based on the detection information of the mixing thermistor 14, the opening of the mixing valve 8 is set based on the deviation between the detected temperature and the filling temperature. Fine adjustment of the hot water filling solenoid valve 2
2 is opened, and the hot water adjusted to the hot water setting temperature by the mixing bubble 8 is supplied to the bath return path 18 and the bath outgoing path 1.
9, the hot water is supplied to the bathtub, and when the hot water is supplied to the hot water level in the bathtub, the hot water electromagnetic valve 22 is closed.

Regarding the control operation of the hot water storage unit A,
A description will be given based on the flowcharts of FIGS. When the engine heat pump air conditioning system is in operation,
When the hot-water tap is opened and hot water is being supplied while the hot-water storage amount of the hot-water storage tank 1 is less than the minimum ensured amount, the hot-water supply priority operation is performed (steps 1 to 3), and the hot-water storage amount of the hot-water storage tank 1 is equal to or greater than the minimum ensured amount Or if the hot water supply priority operation is being performed when hot water is not being supplied, the operation of the auxiliary heating unit 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing (step 4). . Then, when there is a heat radiation request such as a heating request or a reheating request, the heat radiation operation is performed,
When there is a hot water storage request, a hot water storage operation is executed (steps 5 to 5).
8).

The control operation of the heat dissipation operation will be described with reference to the flowchart of FIG. 7. When the hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount and the hot water tap is opened to supply hot water. If there is, hot water supply priority operation is executed (steps 11 to 13). If the hot-water supply priority operation is performed when the hot-water storage amount of the hot-water storage tank 1 is equal to or more than the minimum secured amount or when hot water is not being supplied, the operation of the auxiliary heating unit 35 and the operation of the circulation pump P1 are stopped to supply hot water. A priority operation stop process is executed (step 14).

When there is a reheating request and no heating request, the reheating operation is executed (steps 15 to 1).
7) When both the reheating request and the heating request are present, the simultaneous heating and reheating operation is executed (steps 15 and 1).
6, 18), when there is no reheating request and there is a heating request, a heating operation is executed (steps 15, 19, 2).
0). In this manner, depending on whether one or both of the reheating request and the heating request are requested, in order to respond to the request, the reheating operation, the heating operation, and the respective operations of the heating / reheating simultaneous operation are performed, When the request for the additional heating and the request for the heating are satisfied and the request is completed, a heat radiation stop process for stopping the operation of the hot water circulation unit E for the heat source and the heating unit 4 is executed (steps 21 and 22).

FIG. 8 shows the control operation of the reheating operation.
According to the flowchart described in the above, the detected water level of the water level sensor is read, and the state of the read detected water level is equal to or higher than the set water level. Therefore, when the read water level is lower than the set water level, the detection of the water level sensor is performed. Water filling is performed until the water level reaches the set water level), and the bath pump P3 is operated (steps 31 to 33). When the additional heating operation in the heating unit automatic selection operation mode is commanded, the outside air temperature detected by the outside air temperature sensor 91 and the bath return thermistor 5
7 is read to determine whether the operation of the engine heat pump air conditioner B is possible or not. If the operation is possible, it is determined whether the engine heat pump air conditioner B is operating in air conditioning. If not, the heat-on heating additional heating operation is executed, and thereafter, whether the engine heat pump cooling / heating device B is in the air-conditioning operation, and whether the outside air temperature detected by the outside air temperature sensor 91 and the bath return thermistor 5
The state in which the refrigerant pressure of the engine heat pump cooling / heating device B does not exceed the set pressure while reading the detection bath temperature of the detection bath 7 and monitoring whether the refrigerant pressure does not exceed the set pressure, and the refrigerant pressure does not exceed the set pressure. Then, when the heat-up heating additional heating operation is continued and the temperature of the bath water detected by the bath return thermistor 57 reaches the additional heating set temperature, the process returns (steps 34 to 40).

When it is determined in step 34 that the additional heating operation in the auxiliary heating unit independent operation mode has been commanded, or when it is determined in step 36 that the operation of the engine heat pump type cooling / heating device B is not possible, or If it is determined at 37 that the engine heat pump cooling / heating device B is operating in air conditioning, or if it is determined at step 38 that the refrigerant pressure of the engine heat pump cooling / heating device B is higher than the set pressure, the auxiliary heating additional heating is performed. The operation is executed (step 41), and thereafter, the auxiliary heating reheating operation is continued, and when the temperature of the bathtub detected by the bath return thermistor 57 reaches the reheating setting temperature, the process returns (step 4).
2).

[Another Embodiment] Next, another embodiment will be described. (B) In the above embodiment, the configuration is such that the operation of the engine heat pump type cooling / heating device B is determined based on three conditions of the refrigerant pressure determination condition, the efficiency determination condition, and the boiling time determination condition. Although the case has been exemplified, whether the operation of the engine heat pump cooling / heating device B is enabled or disabled under the two conditions of the refrigerant pressure availability determination condition and the efficiency availability determination condition, or the refrigerant pressure availability determination condition and the boiling time availability determination condition May be determined. Alternatively, the engine heat pump cooling / heating device B may be used under two conditions of the refrigerant pressure propriety determining condition and the efficiency propriety determining condition.
Of the operation of the engine heat pump type cooling / heating device B based on two conditions, that is, a mode for judging whether or not the operation is possible and a condition for judging whether or not the refrigerant pressure is possible and a condition for judging whether or not the boiling time is available. May be configured to be selectable.

(B) Specific examples of the refrigerant pressure propriety determining condition, efficiency propriety discriminating condition, and boiling time propriety discriminating condition are not limited to those exemplified in the above-described embodiment, and are not limited to those described in the above embodiment. It can be set appropriately according to the performance of B, the performance of the auxiliary heating unit 35, and the like.

(C) In the above embodiment, the efficiency determination condition is that the outside air temperature at the start of reheating and the reheating are set for reheating the set amount of hot and cold water in the bathtub to the reheating set temperature. The heating efficiency determined from the bathtub water temperature at the start is set so that it can be determined whether or not the heating unit 33 utilizing the heap refrigerant is higher than the auxiliary heating unit 35. Is not limited to this. For example, as the efficiency judging condition, the instantaneous heating efficiency is determined based on the outside air temperature and the bathtub hot / cold water temperature.
Is set to be able to determine whether or not the temperature exceeds the auxiliary heating unit 35, and during the reheating operation, the outside air temperature and the bathtub hot and cold temperature are detected periodically or continuously. According to the efficiency availability determination condition, it is determined whether the heating efficiency at the time is higher in the heap-on refrigerant-using heating unit 33 than in the auxiliary heating unit 35. It is also possible to select and execute the heating by the auxiliary heating unit 35.

(D) As the auxiliary heating unit 35, in addition to the gas heating type burner 36 as a heat source as exemplified in the above embodiment, a liquid fuel burning type burner, One provided with a heater can be used. Further, as the heat pump type heating unit, a heat pump type air conditioner driven by an electric motor can be used in addition to the engine heat pump type air conditioner B as exemplified in the above embodiment.

(E) Hot water storage tank 1 and hot water storage tank 1
The present invention is also applied to a bath apparatus having only a configuration for simply reheating the hot water in a bathtub, omitting a configuration for storing hot water in the hot water tank, a configuration for supplying hot water in the hot water storage tank 1, and the like. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a hot water storage unit and a flow of hot and cold water in a heat pump heating and reheating operation.

FIG. 2 is a diagram showing a configuration of an engine heat pump type cooling / heating device.

FIG. 3 is a block diagram showing a control configuration of an engine heat pump type cooling and heating hot water supply system.

FIG. 4 is a diagram showing a flow of hot and cold water in an auxiliary heating and reheating operation in a hot water storage unit.

FIG. 5 is a diagram showing the flow of hot and cold water during simultaneous heating and reheating in a hot water storage unit.

FIG. 6 is a diagram showing a flowchart of a control operation of the hot water storage unit.

FIG. 7 is a diagram showing a flowchart of a control operation in the heat dissipation operation.

FIG. 8 is a diagram showing a flowchart of a control operation in the additional heating operation.

FIG. 9 is a diagram showing conditions for determining whether the engine heat pump type air conditioner can be operated or not.

FIG. 10 is a diagram showing the relationship between the heating efficiency of a heat engine heat pump type cooling / heating device, the outside air temperature at the start of additional heating, and the bathtub water temperature at the start of additional heating.

FIG. 11 is a diagram showing a relationship between an expected boiling time and a bathtub water temperature at the start of reheating.

[Explanation of symbols]

 4 Heating Means 35 Auxiliary Heating Section 43 Heat Dissipating Section 57 Bathtub Temperature Detecting Means 91 Outside Air Temperature Detecting Means B Heat Pump Type Heating Section E Heat Source Hot Water Circulation Means H Bath Hot Water Circulation Means R2 Command Means U Control Means

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000221834 Toho Gas Co., Ltd. 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi (71) Applicant 000196680 Seibu Gas Co., Ltd. 1-17-1 Chiyo, Hakata-ku, Fukuoka-shi, Fukuoka No. 1 (72) Inventor Toru Fukuchi Osaka Gas Co., Ltd. 1-3-1 Kitako Shiratsu, Konohana-ku, Osaka-shi (72) Inventor Sakunari Sakuni 1-3-1 Kitako-Shiratsu, Konohana-ku, Osaka-shi Osaka Within Gas Co., Ltd. (72) Inventor Yasuhito Hashizume 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Herman Co., Ltd. (72) Inventor Toshihiro Kawachi 1-1-52, Oka, Minami-shi, Minato-ku, Osaka, Osaka Shares (72) Inventor Yasushi Fujikawa 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka-shi Herman Inc. (72) Inventor Yoshio Fujimoto Osaka-shi, Osaka 1-152 Oka, Minami-shi, Minami-ku, Harman Co., Ltd. (72) The inventor's office Kenji 1-1-51, Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Harman Co., Ltd. (72) Tomoya Sakiishi, Osaka, Osaka 1-152 Oka, Minami-shi, Minato-ku, Tokyo Harman Co., Ltd. (72) Inventor Kenichi Tanoka 1-5-20, Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Kazuya Yamaguchi Port of Tokyo (72) Inventor Naoji Shiya 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi Prefecture In-House Gas Co., Ltd. (72) Inventor Mikio Ito Nagoya, Aichi Prefecture 19-18, Sakuradacho, Atsuta-ku, East Japan Gas Co., Ltd. BC32

Claims (3)

[Claims] 1. A hot-water circulating means for heating and circulating the hot-water for a heat source by a heating means and passing the hot-water through a heat-dissipating part and returning to the heating means, and passing the hot-water in a bathtub through the heat-dissipating part. A bathtub hot water circulating means for circulating the hot water is provided, and the heat radiating section is configured to heat the bathtub hot water by radiating heat from the heat source hot water to the bathtub hot water. A bath apparatus provided with control means for controlling, wherein the heating means is constituted by a heat pump type heating unit and an auxiliary heating unit, and an outside air temperature detecting unit for detecting a temperature of outside air, and a temperature of a bathtub hot water is detected. A bathtub temperature detecting means is provided, wherein the control means has a heating efficiency of heating the bathtub hot water by the heat pump heating unit based on the outside air temperature and the bathtub hot water temperature, and the bathtub hot water is supplied by the auxiliary heating unit. Efficiency availability determination conditions for determining whether or not the heating efficiency exceeds the heating efficiency are stored.The control means includes detection information of the outside air temperature detection means and the bathtub temperature detection means and the efficiency availability determination conditions. Based on the determination, whether or not the heating efficiency of the heat pump heating unit exceeds the heating efficiency of the auxiliary heating unit is determined, and whether or not the heat pump heating unit can be operated is determined based on the determination result. When the operation of the heat pump heating unit is enabled, only the heat pump heating unit is operated, and when the operation of the heat pump heating unit is disabled, only the auxiliary heating unit is operated. A bath device configured to perform an operation. 2. Determine whether or not the heating by the heat pump heating unit satisfies an expected boiling time set to be longer as the temperature of the bathtub water at the start of heating is lower.
A condition for judging whether or not the heating time is possible for discriminating from the temperature of the bath water at the start of heating and the outside air temperature is stored, and the condition for judging whether or not the heat pump type heating unit is operable is determined by the control means. The bath apparatus according to claim 1, wherein the bath apparatus is configured to include a result of determining whether or not the expected boiling time is satisfied based on a determination condition. 3. The control means is capable of selectively executing the heating unit automatic selection operation and the auxiliary heating unit independent operation of heating the bathtub hot water by preferentially operating only the auxiliary heating unit. 3. The bath apparatus according to claim 1, wherein the control unit is provided with a command unit that commands which of the heating unit automatic selection operation and the auxiliary heating unit independent operation is to be executed. 4.