JP2014173792A - Heating water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating water heater that enables suppression of a length of a refrigerant passage where a refrigerant flows and that can simultaneously perform hot water supply operation and heating operation enabling adjustment of division of heat quantity from a heat pump type water heater while performing indoor ventilation accompanying heat exchange between indoor air and outdoor air.SOLUTION: A heating water heater 1 includes a heat pump cycle device 2, a heating heat exchanger 7, a hot water supply heat exchanger 39, a ventilation device 4, and a flow regulating valve 5. The ventilation device 4 includes a heat exchange part for exchanging heat between indoor air and outdoor air. The indoor air that has undergone heat exchange is discharged to an outdoor side, and the outdoor air that has undergone heat exchange is supplied to an indoor side. The flow regulating valve 5 can divide hot water heated by the heat pump cycle device 2 to hot water made to flow in the heating heat exchanger 7 and hot water made to flow in the hot water supply heat exchanger 39.

Description

  The present invention relates to a heating and hot water supply apparatus that can perform hot water supply and heating using a heating action of a heat pump type heating apparatus.

  As a prior art, the heating hot-water supply apparatus of patent document 1 and patent document 2 is known. Patent Document 1 describes a technique of performing heating operation by temporarily storing hot water boiled by a heat pump hot water heat source machine in a tank and then circulating high-temperature water at the upper part of the tank to a radiator for heating. In Patent Document 1, hot water boiled by a heat pump hot water heat source machine is directly circulated to a radiator for heating, and heating operation is performed. There is also described a technique for switching between a case where a heating operation is performed by distributing the heat to a radiator.

  Patent Document 2 describes a heat pump hot water supply air conditioner capable of simultaneously performing heating and hot water supply. During heating and hot water supply operation, a part of the gas refrigerant discharged from the compressor radiates heat to the water sent by the water supply pump in the hot water supply side heat exchanger to create hot water supply water, and the remaining part of the gas refrigerant is in the first four directions. Heating air is created by dissipating heat to the surrounding air through the valve in the indoor heat exchanger. Then, after these heat-dissipating refrigerants merge, they are adiabatically expanded by an expansion valve, and the low-pressure refrigerant evaporates by absorbing the surrounding heat in the outdoor heat exchanger, and the first four-way valve and The air is sucked into the suction side of the compressor through the second four-way valve.

Japanese Patent No. 4419475 JP 2012-225619 A

  However, according to Patent Document 1, when heating is performed using the amount of hot water boiled by a heat pump hot water heat source machine, hot water is temporarily stored in a tank and then supplied to a radiator for heating. The heated hot water is directly supplied to the radiator for heating. Therefore, with this disclosed technique, the heating operation and the hot water supply operation cannot be performed simultaneously.

  Patent Document 1 describes that hot water in a tank can be used with a radiator for heating, and can also be used for hot water supply to a bathtub or the like. However, this disclosed technique only uses hot water once stored in the tank for heating and hot water supply. Therefore, in the disclosed technology of Patent Document 1, the amount of heat of the hot water boiled up by the heat pump hot water heat source device cannot be used for heating without going through the tank, and at the same time cannot be stored in the tank for hot water supply. Furthermore, the technique of Patent Document 1 is not a technique that can distribute the amount of heat of the hot water boiled by the heat pump hot water heat source machine to heating and hot water supply according to the required heating capacity and the required hot water supply capacity. .

  On the other hand, according to Patent Document 2, a hot water supply operation and a heating operation can be performed simultaneously, but there is no mention of an operation with an additional indoor ventilation function. Moreover, in the apparatus of Patent Document 2, there is a problem that the refrigerant path adopted for realizing the simultaneous implementation of the hot water supply operation and the heating operation is complicated, and the passage through which the refrigerant flows becomes very long. If the refrigerant passage becomes long, there is a concern that the device has a heavy load on the environment.

  Therefore, the present invention has been made in view of the above problems, and its purpose is to suppress the length of the refrigerant passage through which the refrigerant flows and to perform indoor ventilation with heat exchange between indoor air and outdoor air. An object of the present invention is to provide a heating and hot water supply apparatus capable of simultaneously performing a hot water supply operation and a heating operation capable of adjusting the distribution of the amount of heat via hot water obtained from a heat pump heating apparatus.

  In order to achieve the above object, the following technical means are adopted. That is, the invention relating to the heating and hot water supply apparatus includes a heat pump type heating device (2) for boiling hot water by the heating action of the refrigerant flowing in the refrigerant cycle, and heating in which hot water heated by the heat pump type heating device flows in and dissipates heat to the surroundings. Heat exchanger (7, 8), hot water supply heat exchanger (39) or tank (3) into which hot water heated by a heat pump heating device flows to generate hot water supply water, indoor air and outdoor A ventilator (4, 24, 70) having a heat exchanging section (40, 41) for exchanging heat with air, exhausting the indoor air after heat exchange to the outside, and supplying the outdoor air after heat exchange to the room ) And the hot water heated by the heat pump type heating device can be divided into hot water circulated through the heating heat exchanger and hot water circulated through the hot water supply heat exchanger or tank (5, 56). , 5 ) And, characterized in that it comprises a.

  According to the present invention, by implementing the hot water passage for distributing the hot water heated by the heat pump heating device to the heating heat exchanger and the hot water supply heat exchanger or the tank, the heating operation and the hot water supply operation can be simultaneously performed. Even so, it is possible to provide a device that simplifies the path of the refrigerant that is the heat source.

  Further, since the outdoor air can be heated by having the ventilation device, the heating load of the heat pump heating device can be reduced. In other words, by having the ventilation device, the heating load of the heat pump type heating device is reduced, and a surplus power for performing the hot water supply operation can be generated, so that simultaneous operation of hot water supply and heating becomes possible. Thus, by having the function of ventilating the room after performing heat exchange between the room air and the outdoor air, a heating hot water supply apparatus that reduces the heating load and contributes to the improvement of the cleanliness of the room air can be obtained.

  Therefore, the length of the refrigerant passage through which the refrigerant flows is suppressed, and the hot water supply operation and the heating operation in which the heat distribution from the heat pump heating device can be adjusted while performing indoor ventilation with heat exchange between indoor air and outdoor air. Thus, a heating and hot water supply apparatus that can carry out the above simultaneously is obtained. Thereby, the heating hot-water supply apparatus of this invention can implement | achieve a stable driving | operation and a highly efficient driving | operation.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means of embodiment mentioned later.

It is the block diagram which showed the heating hot-water supply apparatus of 1st Embodiment to which this invention is applied. It is the block diagram which showed the relationship between a control apparatus and each part about the heating hot-water supply apparatus of 1st Embodiment. It is the flowchart which showed the process sequence regarding the heating hot-water supply driving | operation about the heating hot-water supply apparatus of 1st Embodiment. It is the block diagram which showed the heating hot-water supply apparatus of 2nd Embodiment to which this invention is applied. It is the block diagram which showed the relationship between a control apparatus and each part about the heating hot-water supply apparatus of 2nd Embodiment. It is the flowchart which showed the process sequence regarding the heating hot-water supply driving | operation about the heating hot-water supply apparatus of 2nd Embodiment. It is the block diagram which showed the heating hot-water supply apparatus of 3rd Embodiment to which this invention is applied. It is the block diagram which showed the relationship between a control apparatus and each part about the heating hot-water supply apparatus of 3rd Embodiment. It is the flowchart which showed the process sequence regarding the heating hot-water supply driving | operation about the heating hot-water supply apparatus of 3rd Embodiment. It is the block diagram which showed the heating hot-water supply apparatus of 4th Embodiment to which this invention is applied. It is the block diagram which showed the heating hot-water supply apparatus described in other embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not specified, unless there is a particular problem with the combination. Is also possible.

(First embodiment)
1st Embodiment which is one Embodiment of the heating hot-water supply apparatus of this invention is described with reference to FIGS.

  The heating and hot water supply device 1 includes a tank unit that stores hot water for hot water supply in a tank 3, a heat pump cycle device 2, a hot water circuit in which hot water for heating and hot water supply circulates, and each part when performing hot water supply operation and heating operation. An integrated ECU 100 (control device) for controlling the operation of The heating and hot water supply apparatus 1 performs a hot water supply operation in which heat is stored in the tank 3 as hot water supply water for discharging to a hot water supply terminal such as a bathtub or shower, and the amount of heat of the hot water heated by the heat pump cycle apparatus 2 is converted into a heat exchanger 7 for heating. The heating operation to supply to is performed. The hot water supply operation and the heating operation can be performed simultaneously, and can be performed independently.

  The heating and hot water supply device 1 uses hot water stored in the tank 3 by using, for example, system power in the midnight charge time period, or a daytime solar power generation device when hot water is supplied to a bathtub or a shower. The hot water supply water is boiled and used using the power of the system or the grid power.

  The heat pump cycle device 2 is an example of a heat pump type heating device, uses the refrigerant flowing through the refrigerant cycle as a heat exchange medium, boils water flowing through the hot water circuit, and generates heat for hot water supply and heating. The refrigerant used here is mainly composed of carbon dioxide. The heat pump cycle device 2 is operated by a control signal from the heat pump ECU 101 communicating with the integrated ECU 100, and the operating state is output to the integrated ECU 100 via the heat pump ECU 101.

  The heat pump cycle device 2 includes a compressor 20, a water refrigerant exchanger 21, a decompressor 22, an air refrigerant heat exchanger 23, and an exhaust fan 24. The compressor 20 is a device that compresses and discharges carbon dioxide refrigerant. The water refrigerant exchanger 21 has a refrigerant side passage 210 and a water side passage 211, and is configured such that heat is exchanged between the refrigerant and water flowing inside so as to face each other. The water refrigerant exchanger 21 heats up the hot water by exchanging heat between the refrigerant compressed by the compressor 20 and the water in the water-side passage 211. The decompressor 22 decompresses the high-pressure refrigerant that has passed through the water-refrigerant heat exchanger 21 to a low-pressure state. The air refrigerant heat exchanger 23 absorbs heat from the air by the exhaust fan 24 that sucks not only the outside air but also room air, and evaporates the low-pressure refrigerant decompressed by the decompressor 22. The refrigerant that has passed through the air refrigerant heat exchanger 23 is compressed again by the compressor 20 and discharged in a high-pressure state.

  The tank unit includes a tank 3 that stores hot water for hot water supply, and various valves, pumps, and the like that are operated to discharge hot water to a hot water supply terminal such as a faucet and a bath. The tank unit is operated by a control signal from the hot water storage ECU 102 communicating with the integrated ECU 100, and the operating state is output to the integrated ECU 100 via the hot water storage ECU 102.

  The tank 3 is, for example, a metal tank having excellent corrosion resistance, and a heat insulating material (not shown) is disposed on the outer peripheral portion thereof, so that hot water supply water can be kept warm for a long time. On the outer wall surface of the tank 3, a plurality of tank thermistors (not shown) for detecting the amount of hot water and the temperature of the hot water are provided. The detected temperature signals of these thermistors are respectively input to the hot water storage ECU 102 and can detect the water temperature and the amount of hot water in the tank at each water level. Therefore, the hot water storage ECU 102 can detect the boundary position between the hot water heated in the upper portion of the tank 3 and the water before the lower boiling in the tank 3 based on the temperature information from the tank thermistor. Furthermore, the hot water storage ECU 102 can calculate the amount of heat stored in the tank 3 by detecting the temperature and the amount of hot water.

  The tank 3 is connected to a water supply pipe 34 for supplying tap water to the inside of the tank 3, a hot water heat exchanger 39 and the inside of the tank 3, and a heat storage circuit in which water in the tank 3 circulates. 38 and a piping system including a hot water supply pipe 36 connected to a hot water supply terminal are connected. The hot water supply pipe 36 is connected to the uppermost outlet 31 of the tank 3. The water supply pipe 34 is connected to the lowermost inlet 30 of the tank 3. The water supply pipe 34 branches before reaching the tank 3, and the branched water supply pipe 35 joins the hot water supply pipe 36. A mixing valve 37 is provided at the junction of the water supply pipe 35 and the hot water supply pipe 36.

  The hot water supply pipe 36 located between the outlet 31 and the mixing valve 37 is provided with a hot water supply thermistor (not shown) for detecting the temperature of the hot water flowing through the hot water supply pipe 36. The temperature information detected by the hot water supply thermistor is output to the hot water storage ECU 102 and used for operation control of the mixing valve 37. The hot water storage ECU 102 controls the opening ratio of the mixing valve 37 to control the mixing ratio between the hot water supplied from the upper part of the tank 3 and the water supplied through the water supply pipe 35, and the hot water supplied to the hot water supply terminal. Adjust water temperature.

  The heat storage circuit 38 is connected to the tank 3 via the hot water supply heat exchanger 39 so that the low temperature water in the lower part of the tank 3 flows out and is heated by the hot water supply heat exchanger 39 and returns to the upper part of the tank 3. It is the circuit which connects the lower part and the upper part of. The primary-side passage 391 and the secondary-side passage 390 of the hot water supply heat exchanger 39 constitute an internal passage of the hot water supply heat exchanger 39, and are configured so that fluids flowing through the inside exchange heat with each other so as to face each other. ing.

  The heat storage circuit 38 is connected to the lowermost outlet 32 of the tank 3 and is connected to the uppermost inlet 33 of the tank 3. In the heat storage circuit 38, an incoming water temperature thermistor (not shown) for detecting the water temperature flowing into the secondary side passage 390 of the hot water supply heat exchanger 39 and the water temperature after heating by the secondary side passage 390 are detected. A temperature thermistor (not shown) after heat exchange and a pump 380 are provided. The detected temperature signal of each thermistor is output to hot water storage ECU 102 or integrated ECU 100. The post-heat exchange temperature thermistor is used as a heat medium temperature sensor that detects the temperature of hot water after heat exchange is performed by the hot water supply heat exchanger 39. The pump 380 performs a hot water circulation function that returns water in the lower part of the tank 3 to the upper part of the tank 3 via the heat storage circuit 38.

  The circuit including the communication passage 50 and the hot water supply passage 52 is a hot water supply heating circuit. The communication passage 50 connects the passage connecting the hot water supply heat exchanger 39 (primary side passage 391) and the internal passage of the heating heat exchanger 7 with the water side passage 211 of the water-refrigerant heat exchanger 21. It is. Accordingly, the communication passage 50 is bifurcated into a heating passage 51 toward the heating heat exchanger 7 and a hot water supply passage 52 toward the water-side passage 211 at the downstream end thereof. In the middle of the hot water supply passage 52, there is a primary side passage 391 of the hot water supply heat exchanger 39. A flow rate adjusting valve 5 is provided at a branch portion between the heating passage 51 and the hot water supply passage 52. In addition, each channel | path which comprises the heating circuit for hot water supply is formed by piping which connects between each part.

  The heating heat exchanger 7 is a heating device for generating hot air for indoor heating. In the heat exchanger 7 for heating, when the hot water heated by the heat pump cycle device 2 is flow-adjusted by the flow rate adjusting valve 5 via the communication passage 50 and flows into the internal passage, heat is dissipated around the internal passage, The outdoor air (outside air or the like) sucked by the air supply fan 70 is heated. The outdoor air heated by the heating heat exchanger 7 heats the room and raises the room temperature. The temperature of the air heated by the heating heat exchanger 7 is detected as a voltage signal by the blown air thermistor 10 which is a blown temperature detecting means. The integrated ECU 100 acquires the detected voltage signal and calculates the temperature of air blown into the room.

  A heat exchange unit 4 is provided in the middle of the air path until the outdoor air is heated by the heating heat exchanger 7. The heat exchange unit 4 includes a heat exchange unit that exchanges heat between indoor air exhausted by the exhaust fan 24 and outdoor air supplied by the air supply fan 70. The heat exchanging unit includes an inside air passage 40 through which indoor air flows and an outside air passage 41 through which outdoor air flows. The inside air passage 40 and the outside air passage 41 are configured to exchange heat when the indoor air and the outdoor air flowing through each of them intersect. The ventilation device included in the heating and hot water supply device 1 includes a heat exchanging unit 4 having a heat exchanging function, an exhaust fan 24 having an air blowing function, and an air supply fan 70. In addition, the heat exchange unit 4 may be configured to incorporate a blower, and the indoor air or the outside air may be taken in by the blower.

  The flow rate adjusting valve 5 can adjust the opening degree of each of the heating passage 51 and the hot water supply passage 52 in the range of 0% to 100%. The integrated ECU 100 controls the opening degree on the heating passage 51 side and the opening degree on the hot water supply passage 52 side by the flow rate adjusting valve 5 in accordance with establishment of a predetermined condition to be described later. Therefore, the flow rate adjustment valve 5 is capable of distributing the hot water heated by the heat pump cycle device 2 into the hot water that is circulated through the heating heat exchanger 7 and the hot water that is circulated through the hot water supply heat exchanger 39. It is an example of a means. In other words, the flow rate adjustment valve 5 can control the flow rate of hot water to the heat exchanger 7 for heating and the flow rate of hot water to the heat exchanger 39 for hot water supply according to the required heating capacity and the required amount of hot water supply. Functions as a means.

  When only the hot water supply operation is performed, the flow rate adjusting valve 5 controls the opening degree on the heating passage 51 side to 0% (fully closed) and the opening degree on the hot water supply passage 52 side to 100% (fully open). When only the heating operation is performed, the flow rate adjustment valve 5 controls the opening degree on the heating passage 51 side to 100% (fully open) and the opening degree on the hot water supply passage 52 side to 0% (fully closed). Even when only the heating operation is performed, when the required heating capacity is not high, the flow rate adjusting valve 5 controls the opening degree on the heating passage 51 side to an opening rate corresponding to the required heating capacity, and the heating passage The opening degree on the hot water supply passage 52 side is controlled according to the opening degree on the 51 side. As a result, the hot water flow rate at which the required heating capacity is obtained is distributed to the heating heat exchanger 7, and the amount of heat for hot water supply is stored in the tank 3 via the hot water supply heat exchanger 39 by the remaining hot water flow rate. .

  The heating passage 51 is a passage that extends to the inlet of the water-side passage 211 of the water-refrigerant heat exchanger 21 at the upstream end and the downstream end of the passage 51 for heating. The heating passage 51 is provided with an internal passage of the heating heat exchanger 7, an internal passage of the preheating heat exchanger 6, and a pump 54 in order from the upstream side. The pump 54 flows the hot water flowing out of the water-side passage 211 of the water-refrigerant heat exchanger 21 and flowing through the communication passage 50 to the water-side passage 211 via at least one of the hot water supply passage 52 and the heating passage 51. Performs the function of circulating hot water.

  In the preheating heat exchanger 6, when hot water whose flow rate is adjusted by the flow rate adjustment valve 5 and flowing through the heating passage 51 flows into the internal passage, it is sucked by the air supply blower 70 by radiating heat around the internal passage. Heat the outdoor air. That is, the preheating heat exchanger 6 functions as an auxiliary heating device that heats outdoor air before heat exchange is performed in the heat exchange unit of the heat exchange unit 4. In the preheating heat exchanger 6, when the hot water heated by the heat pump cycle device 2 radiates heat in the heating heat exchanger 7 and then flows into the internal passage, the remaining heat (residual heat) of the hot water is radiated around the internal passage. As a result, the outdoor air before heat exchange in the heat exchange unit 4 is preheated.

  The downstream end of the hot water supply passage 52 joins the heating passage 51 at a passage portion (merging portion 53) located downstream of the preheating heat exchanger 6 and upstream of the heat pump cycle device 2. Therefore, the hot water that has flowed out of the hot water supply heat exchanger 39 joins the hot water that has flowed out of the preheating heat exchanger 6 at the junction 53. Since the junction 53 is positioned downstream of the preheating heat exchanger 6, the water flowing into the water-side passage 211 of the water / refrigerant heat exchanger 21 is radiated by the hot water supply heat exchanger 39 and the temperature is lowered. It becomes mixed water of water and water whose temperature has decreased due to heat radiation by the heat exchanger 7 for heating and the heat exchanger 6 for preheating.

  The integrated ECU 100 includes an input circuit, a microcomputer that executes various calculations using signals from the input circuit, and an output circuit. The input circuit receives a signal from a remote controller 110 that is a driving operation unit that allows a user to set a driving operation, a communication signal with the heat pump ECU 101 and the hot water storage ECU 102, and detection signals from various thermistors and the like. The output circuit outputs a control signal for directly controlling the flow rate adjusting valve 5, the air supply blower 70, and the pump 54 based on the calculation by the microcomputer. The output circuit outputs control signals for controlling various valves such as the compressor 20, the exhaust fan 24, the pump 380, and the mixing valve 37 indirectly via the heat pump ECU 101 and the hot water storage ECU 102.

  A signal from the remote controller 110 is a transmission signal to the integrated ECU 100 from an operation panel or the like for HEMS, kitchen installation or bathroom installation, for example, a signal for setting hot water supply automatic operation such as hot water, a signal for requesting heating operation, heating A signal or the like for simultaneous operation and hot water supply operation. The microcomputer of the integrated ECU 100 incorporates ROM, RAM, etc. as storage means for storing various data, calculation results, etc., and has a preset control program and an updatable control program. To control. However, when the hot water supply operation for storing the amount of heat in the tank 3 is being carried out but the tank 3 is full, the hot water boiling by the heat pump cycle device 2 is stopped. In this case, when the heating operation is being carried out, the heating operation is continued, and when the required heating capacity is small, the heating output is reduced to the lower limit level.

  In the heating and hot water supply apparatus 1 configured as described above, the operation of the heating and hot water supply operation in which the hot water supply operation and the heating operation are performed simultaneously will be described with reference to the flowchart of FIG. The flowchart shown in FIG. 3 is started when a request for a heating operation and a hot water supply operation is input to the integrated ECU 100, and only a heating operation request is input and the required heating capacity is not high. Each step shown in FIG. 3 is mainly executed by the integrated ECU 100.

  First, in step 10, it is determined whether or not the indoor blowing temperature Ta detected by the blowing air thermistor 10 is lower than the blowing target temperature Tset (or the indoor target temperature or the indoor set temperature). The blowing target temperature is determined based on, for example, a signal transmitted from the remote controller 110 to the integrated ECU 100 when the temperature setting unit of the remote controller 110 is operated.

  If it is determined in step 10 that Ta is lower than Tset, the heating capacity is still insufficient. Therefore, in step 20, the flow rate adjustment is performed so as to increase the opening of the heating heat exchanger 7 side, that is, the heating passage 51. The valve 5 is controlled. After this processing, the process returns to step 10 again, and continues to be executed according to the subsequent steps. By the process of step 20, the hot water boiled by the heat pump cycle device 2 flows more to the heating heat exchanger 7 than the previous time. For this reason, with the rise in the temperature of the hot water flowing through the heat exchanger 7 for heating, the blown air temperature rises and control is performed to improve the heating capacity supplied to the room.

  If it is determined in step 10 that Ta is equal to or higher than Tset, it is next determined in step 30 whether Ta is higher than a temperature obtained by adding a predetermined temperature α to Tset. The predetermined temperature α is set to about 5 ° C., for example.

  If it is determined in step 30 that Ta is higher than (Tset + α), the heating capacity is excessive. Therefore, in step 40, the opening of the heating heat exchanger 7 side, that is, the heating passage 51 is decreased. The flow rate adjusting valve 5 is controlled. After this processing, the process returns to step 10 again, and continues to be executed according to the subsequent steps. By the process of step 40, the warm water boiled by the heat pump cycle device 2 flows less to the heating heat exchanger 7 than the previous time. For this reason, with the fall of the hot water temperature which flows through the heat exchanger 7 for heating, the blowing air temperature falls and control which suppresses the heating capability supplied indoors is performed.

  If it is determined in step 30 that Ta is equal to or less than (Tset + α), the process returns to step 10 and is continuously executed according to the subsequent steps.

  Next, the effect which the heating hot-water supply apparatus 1 of 1st Embodiment brings is described below. The heating hot water supply apparatus 1 includes a ventilator and a flow rate adjusting unit. The ventilator has a heat exchange part (heat exchange unit 4) for exchanging heat between indoor air and outdoor air, exhausts the indoor air after heat exchange to the outside, and supplies the outdoor air after heat exchange to the room To do. The flow rate adjusting means can distribute the hot water heated by the heat pump cycle device 2 into hot water that is circulated through the heating heat exchanger 7 and hot water that is circulated through the hot water supply heat exchanger 39.

  According to this, by implementing the hot water passage for distributing the hot water heated by the heat pump cycle device 2 to the heating heat exchanger 7 and the hot water supply heat exchanger 39, the heating operation and the hot water supply operation can be simultaneously performed. However, the apparatus which simplified the path | route of the refrigerant | coolant which is a heat source is realizable.

  For example, when the required heating capacity is large, the heating load of the heat pump cycle device 2 increases if the heating water heater is not provided in the ventilation device. As a result, when the required heating capacity is large and the hot water supply operation is to be performed simultaneously, due to the capacity restriction of the heat pump cycle device 2, the heating capacity is insufficient or no hot water supply is possible, and the simultaneous operation of heating and hot water supply cannot be established.

  Then, according to the heating hot water supply apparatus 1, since outdoor air temperature can be raised by having a ventilator, the heating load of the heat pump cycle apparatus 2 can be reduced. In other words, by having the ventilation device, the heating load of the heat pump cycle device 2 can be reduced, and the remaining power for performing the hot water supply operation can be generated, so that the hot water supply and heating can be operated simultaneously. Thus, the heating hot water supply apparatus 1 has a function of ventilating the room after performing heat exchange between room air and outdoor air, thereby reducing the heating load and contributing to improving the cleanliness of the room air.

  Therefore, the heating and hot water supply apparatus 1 can adjust the distribution of the amount of heat from the heat pump cycle apparatus 2 while suppressing the length of the refrigerant pipe through which the refrigerant flows and performing indoor ventilation with heat exchange between indoor air and outdoor air. Heating and hot water supply operation. Thereby, the heating hot-water supply apparatus 1 can implement | achieve the stable and highly efficient driving | operation. For example, in the case of using a refrigerant having a great influence on the environment, such as chlorofluorocarbon gas, since the amount of refrigerant enclosed in the heat pump cycle device 2 can be suppressed, an environment-friendly heating and hot water supply device can be provided.

  Further, by adjusting the flow rate of the hot water in the heat exchanger 7 for heating by the flow rate adjusting means, the heating capability can be adjusted even below the lower limit heating capability of the heat pump. As described above, since the heating capacity can be widely adjusted, the room temperature can be easily controlled to a constant temperature, and the user's filling can be improved.

  Moreover, according to the heating hot-water supply apparatus 1, the auxiliary | assistant heating apparatus (for example, the heat exchanger 6 for preheating) which heats outdoor air before heat-exchange with the heat exchange unit 4 is provided. According to this, after the outdoor air is preheated by various auxiliary heating devices, the heat exchange unit 4 can exchange heat with the indoor air. Therefore, the thermal loss by implementing indoor ventilation can be suppressed and a preferable heating hot-water supply apparatus can be provided on energy efficiency.

  Moreover, the hot water heated by the heat pump cycle device 2 during the heating operation and the heating hot water supply operation flows out of the heating heat exchanger 7 and then flows into the preheating heat exchanger 6. Thereby, the preheating of the outdoor air before heat exchange by the heat exchange unit 4 can be performed using the remaining heat of the hot water after radiating heat by the heat exchanger 7 for heating. Furthermore, when the outdoor air temperature is below freezing point, if outdoor air is sent directly to the heat exchange unit 4, the moisture in the air freezes inside the heat exchange unit 4, leading to a decrease in ventilation air volume and damage to the apparatus. Then, such a malfunction can be avoided by preheating using the residual heat of warm water with the heat exchanger 6 for preheating. Moreover, since the water temperature which returns to the heat pump cycle apparatus 2 can be reduced by further radiating the residual heat of warm water with the heat exchanger 6 for preheating, it contributes also to improving COP (coefficient of performance).

  Further, the hot water that has flowed out of the hot water supply heat exchanger 39 during the heating and hot water supply operation for performing both heating and hot water supply is located downstream of the preheating heat exchanger 6 and upstream of the heat pump cycle device 2. In (merging part 53), it joins with the warm water which flowed out the heat exchanger 6 for preheating.

  In a heat pump hot water supply device, the lower the outside air temperature that requires preheating, the higher the hot water flow rate in the hot water circuit for heating and the higher the hot water temperature. Further, when the outside air temperature becomes high, the hot water flow rate decreases and the hot water temperature also decreases. As a result, the amount of heat exchanged by the preheating heat exchanger increases as the temperature of the outside air decreases. On the other hand, since the temperature of hot water after heat exchange in the heat exchanger for hot water supply differs depending on the temperature of hot water remaining in the tank, it is generally irrelevant to the outside air. If the joining point of the hot water supply passage is provided in front of the preheating heat exchanger, the temperature of the hot water entering the preheating heat exchanger becomes too high when the remaining hot water temperature is high, and the air temperature after heat exchange becomes room air. The temperature may become higher and the heat exchange in the heat exchange unit may occur in the opposite direction. Conversely, if the remaining hot water temperature is too low, the temperature of the hot water entering the preheating heat exchanger becomes too low, causing a problem that the air temperature after heat exchange does not become sufficiently high.

  Therefore, by joining the hot water supply passage 52 to the heating passage 51 at the junction 53 that is downstream from the preheating heat exchanger 6 and upstream from the heat pump cycle device 2, the preheating heat is supplied regardless of the state of the hot water supply operation. The outlet temperature of the heat exchanger 6 can be stabilized.

  Moreover, the heat exchanger 7 for heating is provided so that it may radiate heat to the outdoor air after the heat exchange by the heat exchange unit 4 and before being supplied indoors. The integrated ECU 100 controls the operation of the flow rate adjusting means according to the blowing temperature Ta detected by the blowing air thermistor 10, and warm water circulated to the heating heat exchanger 7 and hot water circulated to the hot water supply heat exchanger 39. And control the flow rate ratio. The integrated ECU 100 controls the operation of the flow rate adjusting means so as to increase the flow rate of the hot water flowing through the heating heat exchanger 7 when the blowout temperature Ta is lower than the blowout target temperature during the heating hot water supply operation. The integrated ECU 100 controls the operation of the flow rate adjusting means so as to decrease the flow rate of the hot water flowing through the heating heat exchanger 7 when the blowout temperature Ta is higher than a temperature obtained by adding a predetermined temperature to the blowout target temperature Tset. To do. Specifically, the flow rate adjusting valve 5 adjusts the opening area of the heating passage 51 and the opening area of the hot water supply passage 52 during the heating and hot water supply operation.

  According to this, by adjusting the opening ratio of the heating passage 51 and the hot water supply passage 52 by the flow rate adjusting valve 5, the heating capacity can be widely adjusted and fine adjustment is also possible. According to such heating capacity adjustment, it becomes easy to control the room temperature so as not to fluctuate so much.

  Moreover, in the heat pump cycle apparatus 2, the refrigerant | coolant which exhibits a heating effect | action is a refrigerant | coolant which has a carbon dioxide as a main component. According to this, when the refrigerant of the heat pump cycle device 2 is carbon dioxide, since the temperature range that can be heated is wide, it is possible to widely set compatible hot water supply capacity and heating capacity in the heating hot water supply operation.

(Second Embodiment)
As shown in FIGS. 4 and 5, the heating hot water supply apparatus 1 </ b> A of the second embodiment is different from the heating hot water supply apparatus 1 of the first embodiment in flow rate adjusting means. In the second embodiment, configurations, operations, and effects that are not described are the same as those in the first embodiment. The flow rate adjusting means of the second embodiment includes a heating pump 56 provided in the heating passage 51 and a hot water supply pump 57 provided in the hot water supply passage 52. Furthermore, in the heating and hot water supply apparatus 1 </ b> A, the flow rate adjusting valve 5 is not provided at the branch portion 55 of the heating passage 51 and the hot water supply passage 52.

  The heating pump 56 is provided in a passage portion located downstream of the heating heat exchanger 7 and upstream of the preheating heat exchanger 6 in the heating passage 51. The hot water supply pump 57 is provided in a passage portion located downstream of the hot water supply heat exchanger 39 and upstream of the junction 53 in the hot water supply passage 52.

  The integrated ECU 100A controls the rotational speeds of the heating pump 56 and the hot water supply pump 57 in accordance with the blowing temperature Ta detected by the blowing air thermistor 10 so that the hot water flow rate to be driven can be adjusted. it can. The heating pump 56 fulfills the function of a flow rate adjusting means for adjusting the flow rate of hot water to be circulated through the heating heat exchanger 7. The hot water supply pump 57 functions as a flow rate adjusting means for adjusting the flow rate of hot water to be circulated through the hot water supply heat exchanger 39.

  In the heating and hot water supply apparatus 1A having the above configuration, the operation of the heating and hot water supply operation in which the hot water supply operation and the heating operation are performed simultaneously will be described with reference to the flowchart of FIG. The flowchart shown in FIG. 6 is started when a request for a heating operation and a hot water supply operation is input to the integrated ECU 100A, and only a heating operation request is input and the required heating capacity is not high. Each step shown in FIG. 6 is mainly executed by the integrated ECU 100A.

  If it is determined in step 10 similar to the first embodiment that Ta is lower than Tset, the heating capacity is still insufficient. For this reason, in order to increase the flow rate of hot water flowing through the internal passage of the heating heat exchanger in step 20A, control is performed to increase the rotation speed of the heating pump 56 and decrease the rotation speed of the hot water supply pump 57. Increase the output (flow rate). After this processing, the process returns to step 10 again, and continues to be executed according to the subsequent steps. By the process of step 20A, the hot water boiled by the heat pump cycle device 2 flows more to the heating heat exchanger 7 than the previous time. For this reason, with the rise in the temperature of the hot water flowing through the heat exchanger 7 for heating, the blown air temperature rises and control is performed to improve the heating capacity supplied to the room.

  If it is determined in step 10 that Ta is equal to or higher than Tset, and further in step 30, it is determined that Ta is higher than (Tset + α), the heating capacity is excessive. For this reason, in order to reduce the flow rate of the hot water flowing through the internal passage of the heating heat exchanger in step 40A, control is performed to decrease the number of rotations of the heating pump 56 and increase the number of rotations of the hot water supply pump 57. Reduce the output (flow rate). After this processing, the process returns to step 10 again, and continues to be executed according to the subsequent steps. By the process of step 40A, the hot water boiled by the heat pump cycle device 2 flows less to the heating heat exchanger 7 than the previous time. For this reason, with the fall of the hot water temperature which flows through the heat exchanger 7 for heating, the blowing air temperature falls and control which suppresses the heating capability supplied indoors is performed.

  Next, the effect of the heating hot water supply apparatus 1A of the second embodiment will be described. According to the heating hot water supply apparatus 1A, each of the heating pump 56 and the hot water supply pump 57 adjusts the flow rate of the hot water to be driven during the heating hot water supply operation for both heating and hot water supply.

  According to this, by controlling each of the heating pump 56 and the hot water supply pump 57, the hot water flow rate of the heating heat exchanger 7 can be finely adjusted, and the heating capacity is adjusted even below the lower limit heating capacity of the heat pump. be able to. As described above, since the heating capacity can be adjusted widely, it becomes easy to control the room temperature so as not to fluctuate so much.

  Further, the integrated ECU 100A increases the flow rate of the hot water flowing through the heating heat exchanger 7 when the blowing temperature Ta detected by the blowing air thermistor 10 is lower than the blowing target temperature Tset during the heating hot water supply operation. The operations of the heating pump 56 and the hot water supply pump 57 are controlled (step 20A). Further, the integrated ECU 100A, when the blowing temperature Ta is higher than the temperature obtained by adding the predetermined temperature α to the blowing target temperature Tset, the heating pump so as to reduce the flow rate of the hot water flowing through the heating heat exchanger 7 56 and the hot water supply pump 57 are controlled (step 40A).

  According to this, by adjusting the output of the heating pump 56 according to the blowing temperature Ta and the blowing target temperature Tset, the heating capacity can be adjusted so as to approach the blowing target temperature Tset.

(Third embodiment)
As shown in FIGS. 7 and 8, the heating and hot water supply apparatus 1 </ b> B of the third embodiment is different from the heating hot water supply apparatus 1 of the first embodiment in place of the blown air thermistor 10 and the heat exchanger outlet thermistor 11 (heat exchange). The outlet temperature detecting means) is used. For example, the heat exchanger outlet thermistor 11 is provided in the outlet pipe of the heating heat exchanger 7 and detects the hot water temperature Tw at the outlet of the heating heat exchanger 7. In the third embodiment, configurations, operations, and effects not described are the same as those in the first embodiment.

  The temperature of the hot water after radiating heat from the heating heat exchanger 7 is detected as a voltage signal by the heat exchanger outlet thermistor 11. The integrated ECU 100B obtains the detected voltage signal and calculates the water temperature Tw at the outlet of the heating heat exchanger 7. The integrated ECU 100B controls the operation of the flow rate adjusting valve 5 in accordance with the detected water temperature Tw at the outlet of the heating heat exchanger 7 and distributes the hot water and hot water supply heat exchanger 39 to the heating heat exchanger 7. It is possible to control the flow rate ratio with the hot water to be circulated.

  In the heating and hot water supply apparatus 1B having the above-described configuration, the operation of the heating and hot water supply operation in which the hot water supply operation and the heating operation are performed simultaneously will be described with reference to the flowchart of FIG. The flowchart shown in FIG. 9 is started when a heating operation request and a hot water supply operation request are input to the integrated ECU 100B, or when only a heating operation request is input. Each step shown in FIG. 9 is mainly executed by the integrated ECU 100A.

  First, in step 10B, the heat exchanger outlet thermistor 11 determines whether or not the water temperature Tw is lower than the temperature obtained by adding the predetermined temperature β to the blowout target temperature Tset. If it is determined in step 10B that Tw is lower than (Tset + β), since the heating capacity is still insufficient, the flow rate adjustment valve 5 is set so that the opening degree of the heating passage 51 is increased in step 20 similar to the first embodiment. To control. After this processing, the process returns to step 10 again, and continues to be executed according to the subsequent steps.

  If it is determined in step 10 that Tw is equal to or greater than (Tset + β), it is next determined in step 30B whether Tw is higher than a temperature obtained by adding a predetermined temperature α to (Tset + β).

  If it is determined in step 30B that Tw is higher than (Tset + β + α), since the heating capacity is excessive, the flow rate adjustment valve 5 is set so that the opening degree of the heating passage 51 is reduced in step 40 similar to the first embodiment. To control. After this processing, the process returns to step 10 again, and continues to be executed according to the subsequent steps.

  If it is determined in step 30 that Tw is equal to or less than (Tset + β + α), the process returns to step 10 and is continuously executed according to the subsequent steps.

(Fourth embodiment)
The heating hot water supply apparatus 1C of the fourth embodiment is different from the heating hot water supply apparatus 1 of the first embodiment in the object to be heated by the heating heat exchanger 8. That is, the heating heat exchanger 8 does not heat the outside air (outdoor air) supplied to the room like the heating heat exchanger 7 of the first embodiment. For example, the heat exchanger 8 for heating is used as a hot water heater or a floor heater installed indoors. When the heating heat exchanger 8 is a floor heating device, the hot water flowing through the internal passage of the heating heat exchanger 8 passes through the floor heating panel and radiates heat to heat the floor surface.

  With the adoption of the heat exchanger 8 for heating, the heating water heater 1C replaces the blown air thermistor 10 of the first embodiment with a heat exchanger outlet thermistor 11 (heat exchanger outlet temperature detection) in the same manner as the third embodiment. Means).

  In the fourth embodiment, all configurations, operations, and effects that are not described are the same as those in the first embodiment and the third embodiment.

(Other embodiments)
In the above-described embodiment, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. It is.

  The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In the heating and hot water supply apparatuses 1 to 1C of the above embodiment, the hot water heated by the water-refrigerant heat exchanger 21 is distributed to the hot water supply heat exchanger 39 along with the opening degree control of the flow rate adjustment valve 5, As another form, it may be allowed to flow into the tank 3 as shown in the heating and hot water supply apparatus 1D. As shown in FIG. 11, the heating and hot water supply apparatus 1 </ b> D communicates one passage opening / closing part of the flow control valve 5 and the joining part 53 (a part downstream from the preheating exchanger 6) via the inside of the tank 3. A hot water supply passage 52D is provided. The hot water supply passage 52D is a passage that connects one passage opening / closing portion of the flow rate control valve 5 and the introduction port 33 at the upper portion of the tank 3, and a passage that connects the outlet port 32 and the junction portion 53 at the lower portion of the tank 3. Including.

  According to the heating and hot water supply apparatus 1D, during the hot water supply operation and the heating and hot water supply operation, the pump 54 is driven to control the passage opening of the flow rate adjusting valve 5 so as to communicate with the communication passage 50 and the hot water supply passage 52D. Hot water heated by the refrigerant heat exchanger 21 is stored in the tank 3 from above. Along with this, the water located in the lower part of the tank 3 flows out to reach the junction 53, flows into the water-side passage 211 of the water-refrigerant heat exchanger 21, and is heated again by the water-refrigerant heat exchanger 21. , Supplied into the tank 3 from above. Therefore, according to the heating hot water supply apparatus 1D, the hot water boiled by the refrigerant heating action of the heat pump cycle apparatus 2 is directly supplied into the tank 3 during the hot water supply operation or the heating hot water supply operation without passing through the heat exchanger for hot water supply. Can be saved.

  Although the heating hot-water supply apparatus of the said embodiment is provided with the heat exchanger 6 for preheating as an auxiliary heating apparatus which heats outdoor air before heat-exchange in the heat exchange part of the ventilation unit 4, the auxiliary heating included in this invention The apparatus is not limited to this embodiment. For example, various electric heaters such as a PTC heater, a sheathed heater, and a halogen heater that generate heat when energized can be used as the auxiliary heating device.

  Moreover, in the said embodiment, the working refrigerant | coolant which flows through the heat pump cycle apparatus 2 is not limited to a carbon dioxide, Other refrigerant | coolants, such as CFC, may be sufficient.

2. Heat pump cycle device (refrigerant cycle, heat pump heating device)
3 ... Tank 4 ... Heat exchange unit (ventilator)
5. Flow rate adjusting valve (flow rate adjusting means)
6 ... Preheat heat exchanger (auxiliary heating device)
7, 8 ... Heat exchanger for heating 24 ... Blower for exhaust (ventilator)
39 ... Heat exchanger for hot water supply 56, 57 ... Pump (flow rate adjusting means)
70 ... Air supply blower (ventilator)

Claims (8)

A heat pump heating device (2) for boiling hot water by the heating action of the refrigerant flowing in the refrigerant cycle;
A heat exchanger for heating (7, 8) in which hot water heated by the heat pump heating device flows in and dissipates heat to the surroundings;
A hot water supply heat exchanger (39) or a tank (3) into which hot water heated by the heat pump heating device flows to generate hot water supply water;
It has a heat exchanging part (40, 41) for exchanging heat between indoor air and outdoor air, exhausts the indoor air after the heat exchange to the outside, and supplies the outdoor air after the heat exchange into the room A ventilator (4, 24, 70);
The flow rate adjusting means (5, 5) capable of distributing the hot water heated by the heat pump heating device to the hot water flowing through the heating heat exchanger and the hot water flowing through the hot water supply heat exchanger or the tank. 56, 57),
A heating and hot water supply apparatus comprising:   The heating and hot water supply device according to claim 1, further comprising an auxiliary heating device (6) for heating the outdoor air before heat is exchanged in the heat exchange section of the ventilation device. The auxiliary heating device includes a preheating heat exchanger (6) provided in a hot water passage downstream of the heating heat exchanger,
The preheating heat exchanger is heat-exchanged in the heat exchanging unit when hot water heated by the heat pump heating device flows out of the heating heat exchanger and then flows into the preheating heat exchanger. Preheat the outdoor air before
During heating and hot water operation that performs both heating and hot water supply,
The hot water heated by the heat pump heating device is distributed to hot water flowing through the heating heat exchanger and hot water flowing through the hot water supply heat exchanger,
The hot water that has flowed out of the hot water supply heat exchanger has flowed out of the preheating heat exchanger at a passage portion located downstream of the preheating heat exchanger and upstream of the heat pump heating device. The heating / hot water supply apparatus according to claim 2, wherein the hot water supply apparatus joins the warm water. The heating heat exchanger (7) is provided so as to dissipate heat to the outdoor air after being heat-exchanged by the heat exchange unit of the ventilation device and before being supplied to the room,
After the outdoor air is heated by the heating heat exchanger (7), blowout temperature detection means (10) for detecting the temperature of the air blown into the room;
Hot water to be circulated through the heating heat exchanger and the hot water exchanger or the tank by controlling the operation of the flow rate adjusting means according to the air temperature detected by the outlet temperature detecting means. A control device (100) for controlling the flow rate ratio of
With
In the heating and hot water supply operation in which the control device performs both heating and hot water supply, the air temperature detected by the blowing temperature detection means is
When the temperature is lower than the blow-out target temperature, the operation of the flow rate adjusting means is controlled so as to increase the flow rate of the hot water flowing through the heating heat exchanger,
The operation of the flow rate adjusting means is controlled so as to reduce the flow rate of the hot water flowing through the heating heat exchanger when the temperature is higher than a temperature obtained by adding a predetermined temperature to the blow-out target temperature. The heating hot-water supply apparatus as described in any one of Claim 1 thru | or 3. The hot water passage (50) through which the hot water heated by the heat pump heating device flows includes a heating passage (51) toward the heating heat exchanger and a hot water passage (52) toward the hot water heat exchanger. ), And is configured to branch into two
The flow rate adjusting means is a flow rate adjusting valve (5) provided in a bifurcated branch between the heating passage and the hot water supply passage (52),
The flow rate adjusting valve adjusts the opening area of the passage for heating and the opening area of the passage for hot water supply during a heating and hot water supply operation in which both heating and hot water supply are performed. The heating hot water supply apparatus as described in any one. The hot water passage (50) through which the hot water heated by the heat pump heating device flows includes a heating passage (51) toward the heating heat exchanger and a hot water passage (52) toward the hot water heat exchanger. ), And is configured to branch into two
The flow rate adjusting means includes a heating pump (56) provided in the heating passage and a hot water supply pump (57) provided in the hot water supply passage,
Each of the heating pump and the hot water supply pump adjusts the flow rate of the hot water to be driven during the heating hot water supply operation for performing both heating and hot water supply. The heating hot-water supply apparatus as described in. Heat exchanger outlet temperature detection means (11) for detecting the temperature of hot water after radiating heat in the heating heat exchanger (7);
Depending on the water temperature detected by the heat exchanger outlet temperature detecting means, the operation of the flow rate adjusting means is controlled to flow to the hot water to be supplied to the heating heat exchanger and to the hot water supply heat exchanger or the tank. A control device (100B) for controlling a flow rate ratio with the hot water to be made;
The heating hot water supply apparatus according to any one of claims 1 to 3, further comprising:   The heating water heater according to any one of claims 1 to 7, wherein in the heat pump heating device, the refrigerant that exhibits a heating action is a refrigerant mainly composed of carbon dioxide.

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