JP4513760B2 - Heat pump type hot water supply apparatus and control device for heat pump type hot water supply apparatus - Google Patents

Description

  The present invention relates to a hot water supply apparatus capable of mixing hot water heated by a heat pump and hot water stored in a hot water storage tank and discharging the hot water.

As a prior art, there is a hot water supply device disclosed in Patent Document 1 below. This hot water supply device is provided with a heat pump and a hot water storage tank. When the hot water heated by the heat pump does not reach a predetermined temperature when hot water is supplied to the use side terminal, the hot water supply device is higher than the predetermined temperature in the hot water storage tank. The hot water is mixed by a mixing means and discharged. At this time, the hot water temperature after mixing by the mixing means is fed back to control the flow rate from the hot water storage tank.
Japanese Patent Laid-Open No. 2005-121284

  However, the above-described conventional hot water supply apparatus has a problem that the amount of discharged hot water on the terminal side is difficult to stabilize because the flow rate discharged from the hot water storage tank is controlled based on the hot water temperature after mixing.

  For example, when the heating capacity of the heat pump is not sufficiently increased, such as immediately after the heat pump is started, a large amount of hot water from the hot water storage tank is mixed with the hot water heated by the heat pump in the mixing means. After that, when the heating capacity of the heat pump increases, the amount of hot water discharged from the hot water from the hot water storage tank mixed with the water heated by the heat pump in the mixing means is rapidly suppressed, so that the amount of hot water discharged from the terminal is sharply reduced. There is a case.

  In contrast, the present inventors consider that the cause of the above problem is that a large amount of low-temperature hot water is boiled when the heating capacity of the heat pump is not sufficiently increased, and the heating capacity of the heat pump is increased. The hot water supply device that increases the flow rate of the water flowing through the heat exchanger of the heat pump device was studied.

  In the hot water supply apparatus prototyped by the present inventors, it is possible to increase the temperature of the water heated by the heat pump from the stage where the heating capacity of the heat pump has not sufficiently increased, and when the heating capacity of the heat pump has increased. It was confirmed that it is easy to secure the amount of hot water at the terminal. However, it has been found that there is a problem that the amount of hot water in the terminal at the stage where the heating capacity of the heat pump is not sufficiently increased may not be ensured.

  And this problem is caused by controlling the flow rate of hot water from the hot water storage tank based on the hot water temperature after mixing, as in the above-described prior art hot water supply device. It has been found that even when the amount of hot water is small, the hot water temperature to be heated is high and the hot water is not sufficiently replenished from the hot water storage tank.

  In other words, the flow rate of hot water from the hot water storage tank is not controlled based on the hot water temperature after mixing, but the flow rate of hot water from the hot water storage tank is controlled based on the heating capacity of the heat pump, that is, the amount of heat supplied by the heat pump. Then, it was found that the amount of hot water in the terminal can be further stabilized.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a heat pump hot water supply device and a control device for a heat pump hot water supply device that can further stabilize the amount of hot water to the terminal.

In order to achieve the above object, in the invention described in claim 1,
A refrigerant is connected to the compressor (2), the hot water supply heat exchanger (3), the pressure reducing means (4), and the heat source heat exchanger (5) so that the refrigerant can circulate. The refrigerant in the hot water supply heat exchanger (3) A heat pump device (1) that heats water with water to make hot water for hot water supply,
First flow rate adjusting means (16a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3);
A hot water storage tank (10) for storing hot water for hot water supply inside,
When performing hot water supply, second flow rate adjusting means (17) for adjusting the flow rate of hot water from the hot water storage tank (10) mixed with hot water from the hot water supply heat exchanger (3);
Heat pump type comprising control means (100) for controlling the heating operation by the heat pump device (1), controlling the flow rate by the first flow rate adjusting means (16a), and controlling the flow rate by the second flow rate control means (17). A water heater,
The control means (100)
Controlling the first flow rate adjusting means (16a) so that the flow rate of water flowing into the hot water supply heat exchanger (3) increases as the amount of heat supplied by the hot water supply heat exchanger (3) increases,
When the amount of heat supplied by the hot water supply heat exchanger (3) exceeds a predetermined value, the amount of heat supplied by the hot water supply heat exchanger (3) is less than the predetermined value from the hot water storage tank (10). The second flow rate adjusting means (17) is controlled so that the flow rate of the hot water is reduced.

  According to this, as the amount of heat supplied by the hot water supply heat exchanger (3) increases, the flow rate of water passing through the hot water supply heat exchanger (3) can be increased by the first flow rate adjusting means (16a). It is possible to stabilize the boiling temperature of the hot water supply heat exchanger (3) at a high temperature. In such boiling operation, when the amount of heat that can be supplied by the heat exchanger for hot water supply (3) whose heating capacity of the heat pump device (1) is not sufficiently increased is less than a predetermined value, the amount of boiling water is small, When the heating capacity of the heat pump device (1) is sufficiently increased and the amount of heat that can be supplied by the hot water supply heat exchanger (3) is a predetermined value or more, the amount of boiling water increases.

  On the other hand, the second flow rate adjusting means (17) is configured so that the amount of heat supplied by the hot water supply heat exchanger (3) when the amount of heat supplied by the hot water supply heat exchanger (3) exceeds a predetermined value. Is less than the predetermined value, the hot water flow rate from the hot water storage tank (10) is reduced. Therefore, even if the amount of heat that can be supplied by the hot water supply heat exchanger (3) changes, the mixing amount (total amount) of hot water from the hot water supply heat exchanger (3) and hot water from the hot water storage tank (10) changes. It is difficult to let it. In this way, it is possible to further stabilize the amount of hot water while stabilizing the hot water temperature.

  Moreover, in invention of Claim 2, in the invention of Claim 1, the control means (100) is the temperature of the water flowing into the heat exchanger for hot water supply (3), the heat exchanger for hot water supply (3). Calculating the amount of heat supplied by the hot water supply heat exchanger (3) based on the temperature of the hot water boiled by the water and the flow rate of water flowing into the hot water supply heat exchanger (3) or related values thereof. It is a feature.

  According to this, the actual amount of heat supplied by the hot water supply heat exchanger (3) can be accurately calculated.

  Further, in the invention according to claim 3, in the invention according to claim 1, the control means (100) uses at least one of the outside air temperature, the hot water supply set temperature, and at least one related value thereof. The amount of heat supplied by the hot water supply heat exchanger (3) is estimated and calculated.

  According to this, since it is not necessary to calculate the actual amount of heat supplied by the hot water supply heat exchanger (3), the control can be simplified.

In the invention according to claim 4,
A refrigerant is connected to the compressor (2), the hot water supply heat exchanger (3), the pressure reducing means (4), and the heat source heat exchanger (5) so that the refrigerant can circulate. The refrigerant in the hot water supply heat exchanger (3) A heat pump device (1) that heats water with water to make hot water for hot water supply,
First flow rate adjusting means (16a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3);
A hot water storage tank (10) for storing hot water for hot water supply inside,
When performing hot water supply, second flow rate adjusting means (17) for adjusting the flow rate of hot water from the hot water storage tank (10) mixed with hot water from the hot water supply heat exchanger (3);
Heat pump type comprising control means (100) for controlling the heating operation by the heat pump device (1), controlling the flow rate by the first flow rate adjusting means (16a), and controlling the flow rate by the second flow rate control means (17). A water heater,
The control means (100)
The first flow rate adjusting means (16a) is controlled so that the flow rate of water flowing into the hot water supply heat exchanger (3) increases as the amount of heat supplied by the hot water supply heat exchanger (3) increases. ,
The second flow rate adjusting means (17) so that the flow rate of hot water from the hot water storage tank (10) is reduced after the elapse of a predetermined time after starting the boiling operation by the heat pump device (1) before the elapse of the predetermined time. It is characterized by controlling.

  According to this, as the amount of heat supplied by the hot water supply heat exchanger (3) increases, the flow rate of water passing through the hot water supply heat exchanger (3) can be increased by the first flow rate adjusting means (16a). It is possible to stabilize the boiling temperature of the hot water supply heat exchanger (3) at a high temperature. In such boiling operation, when the amount of heat that can be supplied by the heat exchanger for hot water supply (3) whose heating capacity of the heat pump device (1) is not sufficiently increased is less than a predetermined value, the amount of boiling water is small, When the heating capacity of the heat pump device (1) is sufficiently increased and the amount of heat that can be supplied by the hot water supply heat exchanger (3) is a predetermined value or more, the amount of boiling water increases.

  On the other hand, the second flow rate adjusting means (17) has relatively increased the amount of heat that can be supplied by the hot water supply heat exchanger (3) after a predetermined time has elapsed since the start of the boiling operation by the heat pump device (1). In such a case, the flow rate of hot water from the hot water storage tank (10) is reduced before a predetermined time has passed, when the amount of heat that can be supplied by the hot water supply heat exchanger (3) is relatively small. Therefore, even if the amount of heat that can be supplied by the hot water supply heat exchanger (3) changes according to the time since the start of the boiling operation by the heat pump device (1), the hot water from the hot water supply heat exchanger (3) is changed. It is difficult to change the mixing amount (total amount) of hot water from the hot water storage tank (10). In this way, it is possible to further stabilize the amount of hot water while stabilizing the hot water temperature.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the control means (100) changes the predetermined time based on an outside air temperature or a related value.

  According to this, the change in the increasing tendency of the heating capacity of the heat pump device (1) accompanying the change in the outside air temperature or the like, that is, the change in the increasing tendency of the amount of heat that can be supplied by the heat exchanger for hot water supply (3) should be accurately handled. Is possible.

  Further, as in the invention described in claim 6, the first flow rate adjusting means (16a) can be a pump means (16a) for pumping the discharged water to the hot water supply heat exchanger (3).

  Further, as in the seventh aspect of the invention, the first flow rate adjusting means (12a) adjusts the opening degree to adjust the flow rate of water flowing into the hot water supply heat exchanger (3) ( 12a).

  In the invention according to claim 8, the refrigerant of the heat pump device (1) is carbon dioxide, and is pressurized to a critical pressure or higher by the compressor (2).

  According to this, water can be heated in the hot water supply heat exchanger (3) by the carbon dioxide refrigerant whose pressure is raised to a critical pressure or higher. Since the refrigerant whose pressure has been raised above the critical pressure does not condense even when heat is exchanged with water, it is easy to ensure a temperature difference between the refrigerant and water throughout the hot water supply heat exchanger (3). Therefore, it is easy to improve heat exchange efficiency and obtain hot water.

  Further, according to the invention described in claim 9, as in the invention described in claim 1, as the amount of heat supplied by the hot water supply heat exchanger (3) increases, the first flow rate adjusting means ( Since the flow rate of water passing through the hot water supply heat exchanger (3) can be increased by 16a), the boiling temperature of the hot water supply heat exchanger (3) can be stabilized at a high temperature. In such boiling operation, when the amount of heat that can be supplied by the heat exchanger for hot water supply (3) whose heating capacity of the heat pump device (1) is not sufficiently increased is less than a predetermined value, the amount of boiling water is small, When the heating capacity of the heat pump device (1) is sufficiently increased and the amount of heat that can be supplied by the hot water supply heat exchanger (3) is a predetermined value or more, the amount of boiling water increases.

  On the other hand, the second flow rate adjusting means (17) is configured so that the amount of heat supplied by the hot water supply heat exchanger (3) when the amount of heat supplied by the hot water supply heat exchanger (3) exceeds a predetermined value. Is less than the predetermined value, the hot water flow rate from the hot water storage tank (10) is reduced. Therefore, even if the amount of heat that can be supplied by the hot water supply heat exchanger (3) changes, the mixing amount (total amount) of hot water from the hot water supply heat exchanger (3) and hot water from the hot water storage tank (10) changes. It is difficult to let it. In this way, it is possible to further stabilize the amount of hot water while stabilizing the hot water temperature.

  According to the invention described in claim 10, as in the invention described in claim 4, as the amount of heat supplied by the hot water supply heat exchanger (3) increases, the first flow rate adjusting means ( Since the flow rate of water passing through the hot water supply heat exchanger (3) can be increased by 16a), the boiling temperature of the hot water supply heat exchanger (3) can be stabilized at a high temperature. In such boiling operation, when the amount of heat that can be supplied by the heat exchanger for hot water supply (3) whose heating capacity of the heat pump device (1) is not sufficiently increased is less than a predetermined value, the amount of boiling water is small, When the heating capacity of the heat pump device (1) is sufficiently increased and the amount of heat that can be supplied by the hot water supply heat exchanger (3) is a predetermined value or more, the amount of boiling water increases.

  On the other hand, the second flow rate adjusting means (17) has relatively increased the amount of heat that can be supplied by the hot water supply heat exchanger (3) after a predetermined time has elapsed since the start of the boiling operation by the heat pump device (1). In such a case, the flow rate of hot water from the hot water storage tank (10) is reduced before a predetermined time has passed, when the amount of heat that can be supplied by the hot water supply heat exchanger (3) is relatively small. Therefore, even if the amount of heat that can be supplied by the hot water supply heat exchanger (3) changes according to the time since the start of the boiling operation by the heat pump device (1), the hot water from the hot water supply heat exchanger (3) is changed. It is difficult to change the mixing amount (total amount) of hot water from the hot water storage tank (10). In this way, it is possible to further stabilize the amount of hot water while stabilizing the hot water temperature.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram showing a schematic configuration of a heat pump hot water supply apparatus in a first embodiment to which the present invention is applied.

  10 is a hot water storage tank made of metal (for example, made of stainless steel) having excellent corrosion resistance, and a heat insulating material (not shown) is arranged on the outer peripheral portion, so that hot water for hot water supply can be kept warm for a long time. ing. The hot water storage tank 10 of the present embodiment has a vertically long shape, and an introduction port 11 is provided on the bottom surface thereof, and an introduction pipe 12 that is a water supply path for introducing tap water into the hot water storage tank 1 is connected to the introduction port 11. ing.

  A suction port 13 for sucking water in the hot water storage tank 10 is provided in the lower part of the hot water storage tank 10, and a discharge port 14 for discharging hot water in the hot water storage tank 1 is provided in the upper part of the hot water storage tank 10. It has been.

  The suction port 13 and the discharge port 14 are connected by a circulation circuit 16, and a part of the circulation circuit 16 is disposed in the heat pump device 1. The circulation circuit 16 is provided with a circulation pump 16 a inside or outside the heat pump device 1.

  A portion of the circulation circuit 16 disposed in the heat pump device 1 is provided with a heat exchanger 3 for hot water supply, and the water in the lower part of the hot water storage tank 10 sucked from the suction port 13 is exchanged with the high-temperature refrigerant. It is heated and boiled to form hot water, and can be returned from the discharge port 14 into the hot water storage tank 10.

The heat pump device 1 includes a compressor 2, a hot water supply heat exchanger 3, a variable pressure reducing device (corresponding to the pressure reducing means in the present invention) 4, an evaporator (corresponding to the heat source heat exchanger in the present invention) 5, and an accumulator 6. Are sequentially connected in an annular manner by the refrigerant pipe 1a. Carbon dioxide (CO ₂ ) is used as a refrigerant circulating in the refrigerant pipe 1a.

  The compressor 2 is driven by a built-in electric motor (not shown), and compresses and discharges the gas-phase refrigerant sucked from the accumulator 6 to a critical pressure or higher. The compressor 2 is operated and its refrigerant discharge amount (rotation speed) is controlled by a heat pump control device (not shown) of the control device 100 described later.

  The hot water supply heat exchanger 3 exchanges heat between the high-temperature refrigerant (hot gas) discharged from the compressor 2 and hot water supplied from the hot water storage tank 10 to be described later, and heats the hot water by heat radiation. To make hot water.

  This hot water supply heat exchanger 3 has a refrigerant flow path 3a through which refrigerant flows and a hot water supply water flow path 3b through which hot water supply water flows, and flows through the flow direction of the refrigerant flowing through the refrigerant flow path 3a and the hot water supply water flow path 3b. It is comprised so that the flow direction of the hot water supply water may oppose.

  Since the carbon dioxide refrigerant flowing through the hot water supply heat exchanger 3 is pressurized to a critical pressure or higher by the compressor 2, even if the temperature is lowered by dissipating heat to the hot water supply water flowing through the hot water supply heat exchanger 3. There is no condensation. Therefore, it is easy to ensure a temperature difference between the refrigerant and water in the entire area of the hot water supply heat exchanger 3, and it is easy to improve the heat exchange efficiency and obtain hot water.

  The decompression device 4 is decompression means for decompressing the refrigerant flowing out of the hot water supply heat exchanger 3 in accordance with the valve opening degree. Specifically, the decompression device 4 is configured to greatly reduce the pressure as the valve opening degree is reduced. The valve opening degree of the decompression device 4 is electrically controlled by a heat pump control device of the control device 100 described later.

  The evaporator 5 is a heat source heat exchanger that absorbs heat from outside air blown by a fan (not shown) and evaporates the refrigerant decompressed by the decompression device 4. On the upstream side of the air flow of the evaporator 5, a temperature thermistor 7 is disposed as an outside air temperature detecting means for detecting the outside air temperature.

  The accumulator 6 is a gas-liquid separator that gas-liquid separates the refrigerant flowing out of the evaporator 5 and sucks only the gas-phase refrigerant into the compressor 2 and stores excess refrigerant in the cycle as liquid refrigerant.

  In the circulation circuit 16 described above, a downstream portion of the heat pump device 1 hot water supply heat exchanger 3 serves as a supply pipe 18 for supplying hot water boiled by the heat pump device 1 to the upper part of the hot water storage tank 10. Yes.

  A hot water supply pipe 19 is connected to the circulation circuit 16 so as to branch from the supply pipe 18 of the circulation circuit 16 on the downstream side of the hot water supply heat exchanger 3. At the branch connection point of the hot water supply pipe 19 of the supply pipe 18, switching means for switching the flow path of hot water boiled up by the heat pump device 1 to the direction of the pipe 18 a forming the downstream end of the supply pipe 18 or the direction of the hot water supply pipe 19. A valve 17 having a function as a valve) is provided.

  The discharge port 14 at the top of the hot water storage tank 10 also has a function as a discharge port 20 for deriving the hot water at the top of the hot water storage tank 10, and a pipe 18 a connected to the discharge port 14 and the discharge port 20 is It is also a hot water supply pipe for leading out hot water in the hot water storage tank 10.

  The above-described valve 17 guides the hot water storage tank 10 to be mixed with hot water supplied from the hot water supply heat exchanger 3 when the flow path of hot water boiled by the heat pump device 1 is switched to the hot water supply pipe 19 direction. It also functions as a mixing valve for controlling the ratio of the amount of hot water led out from the outlet 20.

  That is, the valve 17 corresponds to second flow rate adjusting means for adjusting the flow rate of hot water from the hot water storage tank 10 to be mixed with hot water from the hot water supply heat exchanger 3 in the present embodiment. Incidentally, the above-described pump 16a is a pump unit that pumps the water discharged in the present embodiment to the hot water supply heat exchanger 3, and a first flow rate adjustment unit that adjusts the flow rate of the water flowing into the hot water supply heat exchanger 3. It corresponds to.

  The hot water supply pipe 19 is connected to the downstream end of the water supply pipe 28 branched from the introduction pipe 12. At this connection point, the ratio of the amount of hot water flowing through the hot water supply pipe 19 and the amount of water supplied through the water supply pipe 28 is controlled, so that the use side terminal such as a bath, shower or currant on the downstream side can be controlled. A mixing valve 29 is provided for setting the temperature of the hot water to be set to a set temperature.

  A plurality of thermistors (water level thermistors) (not shown) are arranged on the outer wall surface of the hot water tank 1 at intervals in the vertical direction so that temperature information in each water level in the hot water tank 1 is output to the control device 100 described later. It has become.

  Further, a thermistor is appropriately disposed in each piping path, and temperature information of refrigerant, hot water or water flowing through each piping is output to the control device 100 described later.

  On the upstream side of the hot water supply heat exchanger 3 in the circulation circuit 16 with respect to the hot water flow path 3b, the temperature of the water supplied (inflow) to the hot water supply heat exchanger 3 in the hot water flow path 3b by the pump 16a is detected. A temperature thermistor 30 is provided as water temperature detection means (inflow water temperature detection means).

  Further, on the downstream side of the hot water supply heat exchanger 3 in the circulation circuit 16 and the upstream side of the valve 17 and on the upstream side of the valve 17 is a temperature that is a water temperature detecting means for detecting the temperature of the water that has passed through the hot water supply heat exchanger 3. A thermistor 31 is provided. It can be said that the temperature thermistor 31 is a boiling temperature detection means for detecting the temperature of the hot water boiled by the hot water supply heat exchanger 3.

  Further, a temperature thermistor 32 serving as a water temperature detecting means for detecting the temperature of the hot water mixed by the valve 17 is provided on the downstream side of the valve 17 of the hot water supply pipe 19 and the upstream side of the mixing valve 29.

  Further, a temperature thermistor 33 which is a water temperature detecting means for detecting the temperature of hot water mixed with water by the mixing valve 29 is provided on the downstream side of the mixing valve 29 of the hot water supply pipe 19.

  The hot water supply pipe 19 is provided with a flow rate counter (not shown) so as to output the flow rate information of the hot water flowing through the hot water supply pipe 19 to the control device 100 described later.

  In FIG. 1, reference numeral 100 denotes a control device that is a control means, and is constituted by a hot water storage tank control device (hot water storage tank ECU) that controls the hot water storage tank 10 unit and a heat pump control device (heat pump ECU) that controls the heat pump device 1. Yes. Further, reference numeral 110 in FIG. 1 denotes an operation panel serving as an operation means, and the operation panel 110 is provided with various operation switches and a display unit. The operation panel 110 can set the hot water supply temperature at the use side terminal, and is a hot water supply temperature setting means in the present embodiment.

  The control device 100 includes temperature information from the thermistors 7, 30, 31, 32, 33 and other thermistors (not shown), flow information from a flow counter (not shown), and signals from operation switches provided on the operation panel 110 ( The heat pump device 1, the pump 16 a, the valves 17 and 29, and the like are controlled based on the hot water supply set temperature information and the like in accordance with a procedure described later. In the control of the heat pump device 1, specifically, the opening degree of the variable pressure reducing device 4 and the frequency (rotational speed) of the compressor 2 are controlled.

  Next, based on the said structure, the action | operation of the heat pump type hot-water supply apparatus of this embodiment is demonstrated.

  In the heat pump type hot water supply apparatus of the present embodiment, the control device 100 is based on past usage records or the like in a predetermined time zone determined based on the power cost or the like (for example, a midnight time zone where the power cost based on the power supply contract is low). The heat pump device 1 is operated so as to store a predetermined amount of heat in the hot water storage tank 10.

  At this time, the control device 100 performs the boiling operation control of the heat pump device 1 and the circulation flow rate control of the pump 16a so that the detected temperature of the thermistor 31 becomes the hot water storage target temperature. Moreover, the valve | bulb 17 makes the distribution path of the hot water boiled with the heat pump apparatus 1 the piping 18a direction.

  As a result, the water in the lower part in the hot water storage tank 10 is heated and heated by the hot water supply heat exchanger 3 of the heat pump device 1 and stored from the upper side in the hot water storage tank 10.

  When a hot water discharge operation is performed at the use side terminal, the control device 100 performs hot water supply control for supplying hot water to the use side terminal. FIG. 2 is a flowchart showing a schematic control operation of the control device 100 during hot water supply.

  When power is supplied to the hot water supply device, the control device 100 indicates whether or not a hot water discharge operation has been performed at the use side terminal, as shown in FIG. 2, based on flow rate information from a flow counter (not shown) provided in the hot water supply pipe 19. Based on the monitoring (step S210).

  Detection of the hot water at the use side terminal is not limited to that based on flow rate information from the flow rate counter, and may be based on flow information such as a flow switch. Further, the detection position is not limited to the hot water supply pipe 19, and may be detected by the introduction pipe 12, for example. In addition to the above, the hot water detection may be performed based on temperature information or pressure information in the hot water supply pipe 19, heat information or pressure information in the hot water storage tank 10, and the like.

  In step S210, when hot water is detected, the heat pump device 1 is operated and the hot water supply heat exchanger 3 is used to boil hot water (step S220). In step S220, the operation is started when the heat pump device 1 is stopped, and the operation is continued when the heat pump device 1 is already operated. When the operation of the heat pump device 1 is started, the operation of the pump 16a is also started.

  If no hot water is detected in step S210, the operation of the heat pump device 1 is stopped (step S230). In step S230, the operation is stopped when the heat pump device 1 is operating, and the stopped state is continued when the heat pump device 1 is already stopped. Then, the process returns to step S210.

When the operation of the heat pump device 1 is started or continued in step S220, the amount of heat supplied from the refrigerant to the water is calculated by the hot water supply heat exchanger 3 of the heat pump device 1 (step S240). Specifically, the control device 100 calculates the amount of heat Q supplied by the hot water supply heat exchanger 3 based on the following mathematical formula 1.
(Equation 1)
Q = A × (T2-T1) × N
Here, T1 is the feed water temperature detected by the temperature thermistor 30, T2 is the boiling temperature detected by the temperature thermistor 31, N is the rotational speed or output of the pump 16a, and A is a constant.

  Thus, in step S240, the temperature of the water flowing into the hot water supply heat exchanger 3, the temperature of the hot water boiled by the hot water supply heat exchanger 3, and the flow rate of the water flowing into the hot water supply heat exchanger 3 are determined. Based on the relevant value, the amount of heat supplied by the hot water supply heat exchanger 3 is directly calculated.

  According to this, the actual amount of heat supplied by the hot water supply heat exchanger 3 can be accurately calculated, and the subsequent control can be performed by accurately grasping the state of the heat pump device 1.

  In this example, the rotation speed or output of the pump 16a is used as a related value of the flow rate of water flowing into the hot water supply heat exchanger 3, but other related values may be used, and a flow rate counter or the like is provided. The flow rate may be directly detected and used.

  When the supply heat quantity is calculated in step S240, the operation control of the pump 16a is performed based on this heat quantity (step S250). Specifically, the pump 16a is controlled so that the flow rate of water flowing into the hot water supply heat exchanger 3 increases as the amount of heat supplied by the hot water supply heat exchanger 3 calculated in step S240 increases. . Thereby, the hot water temperature boiled by the heat pump apparatus 1 can be stabilized at a temperature approximate to the hot water supply set temperature.

  The boiling water temperature of the heat pump device 1 is preferably set to a relatively low temperature because the heat pump device 1 can be operated with high efficiency. For example, the boiling water temperature may be a temperature slightly lower than the hot water supply set temperature (for example, a set temperature of −5 ° C.), or a temperature that is suppressed to a level that is equal to or slightly higher than the hot water set temperature (for example, a set temperature). Temperature + 5 ° C.).

  If step S250 is performed, it will be determined whether the heat supply amount of the hot water supply heat exchanger 3 calculated in step S240 is equal to or greater than a predetermined value (step S260).

  If it is determined in step S260 that the supplied heat amount is less than the predetermined value, the valve 17 is controlled in the first mode (step S270). If it is determined that the supplied heat amount is greater than or equal to the predetermined value, the valve 17 is controlled. Are controlled in the second mode (step S280).

  The first mode control of the valve 17 performed in step S270 is to mix a relatively large amount of hot water from the hot water storage tank 10 with the hot water from the hot water supply heat exchanger 3 in which the amount of hot water is small because the amount of supplied heat is small. Furthermore, it is control for adjusting the opening degree of the valve 17.

  The second mode control of the valve 17 performed in step S280 is to adjust the opening degree of the valve 17 so that a smaller amount of hot water is mixed from the hot water storage tank 10 or stopped from the hot water storage tank 10 than in the first mode control. It is control to do.

  When step S270 or S280 is executed, only hot water in which hot water from the hot water storage tank 10 is mixed with hot water from the hot water supply heat exchanger 3 or hot water from the hot water supply heat exchanger 3 flows through the hot water supply pipe 19.

  The temperature of the hot water flowing through the hot water supply pipe 19 may be a temperature equal to or slightly higher than the hot water supply set temperature at the use side terminal set on the operation panel 110 or the like (for example, set temperature + 5 ° C.). However, it is easier to control the hot water temperature by mixing water on the downstream side of the hot water supply pipe 19, and the flow rate to the use side terminal can be increased by setting the temperature slightly higher than the hot water supply temperature. preferable.

  Further, the opening degree of the mixing valve 29 is also controlled so that the detected temperature of the temperature thermistor 33 becomes the hot water supply set temperature at the use side terminal.

  As described above, when step S270 or S280 is executed, the process returns to step S210.

  According to the above-described configuration and operation, the control device 100 causes the pump 16a to increase the flow rate of water passing through the hot water supply heat exchanger 3 as the amount of heat supplied by the hot water supply heat exchanger 3 increases. Therefore, the boiling temperature by the hot water supply heat exchanger 3 can be stabilized at a relatively high temperature.

  When such heating operation is performed, if the heating capacity of the heat pump device 1 is not sufficiently increased and the amount of heat that can be supplied by the hot water supply heat exchanger 3 is small, the amount of boiling water is small and the heat pump device. When the heating capacity of 1 increases and the amount of heat that can be supplied by the hot water supply heat exchanger 3 increases, the amount of boiling water increases.

  On the other hand, when the amount of heat supplied by the hot water supply heat exchanger 3 is less than a predetermined value, the control device 100 controls the valve 17 in the first mode of step S270 to start from the hot water supply heat exchanger 3. A relatively large amount of hot water is mixed into the hot water from the hot water storage tank 10. When the amount of heat supplied by the hot water supply heat exchanger 3 exceeds a predetermined value, the valve 17 is controlled in the second mode of step S280, and the hot water from the hot water storage tank 10 is controlled by the first mode control. Reduce the flow rate.

  Therefore, even if the amount of heat that can be supplied by the hot water supply heat exchanger 3 changes, it is difficult to change the mixing amount (total amount) of hot water from the hot water supply heat exchanger 3 and hot water from the hot water storage tank 10. In this way, the amount of hot water can be stabilized while the temperature of the hot water is stabilized.

  FIG. 3 is a graph showing an operation example of the heat pump type hot water supply apparatus of the present embodiment. (A) is the flow rate of hot water boiled in the hot water supply heat exchanger 3 of the heat pump device 1, (b) is the flow rate of hot water mixed from the hot water storage tank 10, and (c) is the flow rate of hot water after mixing the two. Show.

  As shown to Fig.3 (a), with the raise of the heating capability of the heat pump apparatus 1 with progress of time after starting, the pump 16a increases the flow rate of the feed water pumped and the amount of boiling hot water increases. And when it becomes the boiling flow volume corresponding to the predetermined calorie | heat amount of step S260 shown with a broken line, the control apparatus 100 switches control of the valve | bulb 17. FIG.

  As shown in FIG. 3B, when the amount of heat supplied by the hot water supply heat exchanger 3 is less than a predetermined amount of heat, the valve 17 is controlled in the first mode and supplied by the hot water supply heat exchanger 3. When the amount of heat is greater than or equal to a predetermined amount of heat, the valve 17 is controlled in the second mode so as to reduce the flow rate of mixing from the first mode. Thereby, as shown in FIG.3 (c), a mixing flow rate can be stabilized.

  Note that the present invention is not limited to the above example, and the second mode only needs to control the valve 17 so as to reduce the hot water flow rate from the hot water storage tank 10 compared to the first mode. For example, as shown in FIG. The flow rate may be decreased stepwise in the first mode and the second mode.

  Further, the flow rate in the first mode and the flow rate in the second mode may be constant, gradually decrease, or decrease stepwise in each mode. For example, as shown in FIG. In the second mode, it may be gradually decreased.

  Further, the predetermined heat amount in the hot water supply heat exchanger 3 for switching the control mode of the valve 17 may be an intermediate heat amount from the start of the heat pump device 1 to the stabilization, for example, as shown in FIG. It may be the amount of heat supplied immediately after startup.

  Also in the operation examples shown in FIGS. 4 to 6, the mixed flow rate can be stabilized as shown in each figure (c).

(Second Embodiment)
Next, a second embodiment will be described based on FIGS. 1 and 2 used in the first embodiment.

  The second embodiment is different from the first embodiment in that the amount of heat supplied by the hot water supply heat exchanger 3 is estimated and calculated. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In the present embodiment, in step S240 of FIG. 2, the control device 100 calculates an estimated amount of heat Q2 supplied by the hot water supply heat exchanger 3 based on the following mathematical formula 2.
(Equation 2)
Q2 = (B × N / NS) × QS
Here, N is the number of revolutions of the pump 16a at the current time, NS is the number of revolutions of the pump 16a during stable operation of the heat pump device 1 determined from the outside air temperature TO detected by the temperature thermistor 7 and the hot water supply set temperature TS set on the operation panel 110, QS Is the amount of heat supplied during stable operation of the heat pump device 1, and B is a constant.

  Since the outside air temperature and the hot water supply set temperature hardly change in a short time, after the first operating condition is determined, the supply heat quantity estimated value QS is calculated only by the pump rotational speed N. Is possible.

  In this way, the supply heat quantity estimated value QS can be calculated by a relatively simple calculation, and it is not necessary to calculate the actual heat quantity supplied by the hot water supply heat exchanger 3, so that the control can be simplified.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG.

  The third embodiment is different from the first embodiment in the configuration of the hot water supply device and the means for adjusting the flow rate of water flowing into the hot water supply heat exchanger. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 7, the introduction pipe 12 is provided with a flow rate adjustment valve 12 a that regulates the flow rate of water flowing through the introduction pipe 12.
The upstream end of the pipe 26 is connected to the downstream side of the flow rate control valve 12 a of the introduction pipe 12, and the downstream end is upstream of the water flow path 3 b of the heat exchanger 3 for hot water supply and downstream of the pump 16 a of the circulation circuit 16. Connected to the side.

  The pipe 26 is provided with a check valve 27, and supplies tap water directly from the introduction pipe 12 to the hot water supply heat exchanger 3 when the hot water heated by the heat pump device 1 is directly discharged from the hot water supply pipe 19. It can be done. The pipe 26 is a water supply pipe that supplies the hot water supply heat exchanger 3 with water that bypasses the hot water storage tank 10 and exchanges heat with the refrigerant.

  Although illustration of the control flow of this embodiment is abbreviate | omitted, the control apparatus 100 does not drive the pump 16a in the step equivalent to step S220 shown in FIG. 2, and the flow control valve 12a in the step equivalent to step S240. Is used to calculate the amount of heat supplied.

Specifically, the control device 100 calculates the amount of heat Q supplied by the hot water supply heat exchanger 3 based on the following Equation 3.
(Equation 3)
Q = C × (T2-T1) × L
Here, T1 is the feed water temperature detected by the temperature thermistor 30, T2 is the boiling temperature detected by the temperature thermistor 31, L is the opening of the flow control valve 12a, and C is a constant.

  Thus, in step S240, the temperature of the water flowing into the hot water supply heat exchanger 3, the temperature of the hot water boiled by the hot water supply heat exchanger 3, and the flow rate of the water flowing into the hot water supply heat exchanger 3 are determined. Based on the relevant value, the amount of heat supplied by the hot water supply heat exchanger 3 is directly calculated.

  Then, in a step corresponding to step S250 shown in FIG. 2, the opening degree of the flow rate control valve 12a is adjusted and flows into the hot water supply heat exchanger 3 as the amount of heat supplied by the hot water supply heat exchanger 3 increases. The flow rate of water is increased.

  The flow rate adjusting valve 12a corresponds to the first flow rate adjusting means in the present embodiment. The effect similar to 1st Embodiment can be acquired also by the above-mentioned structure and operation | movement.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG.

  The fourth embodiment is different from the first embodiment described above in that the control of the valve 17 that is the second flow rate adjusting means is switched based on the time after the heat pump device 1 is activated. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in the control operation flow of the control means in FIG. 8, in the present embodiment, the control device 100 executes step S220 as in the first embodiment, and starts or continues the operation of the heat pump device 1, It is determined whether or not a timer that counts the time after activation of the heat pump device 1 (after the start of operation) is in operation (step S310).

  When it is determined in step S310 that the timer is not operating, in other words, when the operation of the heat pump apparatus 1 is started in step S220, a timer time (a predetermined time for switching the control of the valve 17) is set (step S320). ), A timer is started (step S330).

  The rise time of the heating capacity of the heat pump device 1 becomes a substantially constant value in the operating environment such as the outside air temperature. Therefore, in step S320, control device 100 sets a timer time (a predetermined time for switching the control of valve 17) using at least one of the outside air temperature and its related value.

  In this example, the predetermined time is set by referring only to the value of the outside air temperature detected by the temperature thermistor 7. Since the outside air temperature is used directly and the timer time is set without referring to a plurality of values, the setting is easy and it is easy to improve the following control accuracy.

  As the related value of the outside air temperature, for example, date / time data, month / day data, or the like can be adopted to further facilitate the setting. The setting can be further facilitated by setting the predetermined time as a fixed time.

  When the timer is started by executing step 330, in step S250, the water flowing into the hot water supply heat exchanger 3 as the amount of heat supplied by the hot water supply heat exchanger 3 increases in the same manner as in the first embodiment. The operation of the pump 16a is controlled so that the flow rate of the pump increases. In step S250, the operation of the pump 16a may be controlled so that the flow rate of water flowing into the hot water supply heat exchanger 3 increases as the timer count (elapsed time) increases regardless of the amount of heat. Good.

  If it is determined in step S310 that the timer is operating, steps S320 and S330 are passed, and the process proceeds to step S250.

  When step S250 is executed, it is determined whether or not the predetermined time set in step S320 has elapsed (step S340). If the predetermined time has not elapsed, the process proceeds to step S270, and if the predetermined time has elapsed, the process proceeds to step S280.

  According to the above-described configuration and operation, the control device 100 causes the pump 16a to increase the flow rate of water passing through the hot water supply heat exchanger 3 as the amount of heat supplied by the hot water supply heat exchanger 3 increases. Therefore, the boiling temperature by the hot water supply heat exchanger 3 can be stabilized at a relatively high temperature.

  When such a heating operation is performed, if the heating capacity of the heat pump device 1 is not sufficiently increased and the amount of heat that can be supplied by the hot water supply heat exchanger 3 is small, the amount of boiling water is small and the heat pump device. When the heating capacity of 1 increases and the amount of heat that can be supplied by the hot water supply heat exchanger 3 increases, the amount of boiling water increases.

  On the other hand, the control device 100 controls the valve 17 in the first mode of step S270 from the heat exchanger 3 for hot water supply before the predetermined time has elapsed since the start of the heating operation by the heat pump device 1. A relatively large amount of hot water is mixed into the hot water from the hot water storage tank 10. In addition, after a predetermined time has elapsed since the start of the heating operation by the heat pump device 1, the valve 17 is controlled in the second mode of step S280, and the flow rate of hot water from the hot water storage tank 10 is reduced by the first mode control. To do.

  Therefore, even if the amount of heat that can be supplied by the hot water supply heat exchanger 3 changes according to the time since the start of the boiling operation by the heat pump device 1, the hot water from the hot water supply heat exchanger 3 and the hot water storage tank 10 It is difficult to change the mixing amount (total amount) with hot water. In this way, the amount of hot water can be stabilized while the temperature of the hot water is stabilized.

(Other embodiments)
In the first embodiment, the first flow rate adjusting means is the pump 16a, and the control device 100 directly calculates the amount of heat supplied in the hot water supply heat exchanger 3 (calculates the actual amount of heat). In the second embodiment, the first flow rate adjusting means is the pump 16a, and the control device 100 estimates and calculates the amount of heat supplied in the hot water supply heat exchanger 3. In the third embodiment, the first flow rate adjusting means is the flow rate adjusting valve 12a, and the control device 100 directly calculates the amount of heat supplied in the hot water supply heat exchanger 3. In the fourth embodiment, the first flow rate adjusting means is the pump 16a, and the control device 100 calculates a predetermined time after the activation of the heat pump device 1 related to the amount of heat supplied to the hot water supply heat exchanger 3.

  The application of the present invention is not limited to the above-described embodiments, and the first flow rate adjusting means and the heat amount or time calculation method may be in other combinations. For example, in the hot water supply apparatus using the flow rate adjusting valve 12a as the first flow rate adjusting means as in the third embodiment, the heat quantity may be estimated and calculated as in the second embodiment.

  The application of the present invention is not limited to the hot water supply apparatus having the configuration of each of the above embodiments, and hot water in the hot water storage tank can be appropriately mixed with the hot water boiled by the heat pump device when the hot water is discharged to the use side terminal. Any hot water supply device is effective when the present invention is applied. For example, the flow rate control valve 12a described in the third embodiment may be provided in the pipe 26 instead of the introduction pipe 12. Moreover, although the 2nd flow volume control means demonstrated by said each embodiment was the valve | bulb 17, the flow volume control valve provided in the piping 18a may be sufficient.

  In the second embodiment, the control device 100 uses the rotation speed of the pump 16a during stable operation of the heat pump device 1 determined from the outside air temperature detected by the temperature thermistor 7 and the hot water supply set temperature set on the operation panel 110. The amount of heat supplied by the hot water supply heat exchanger 3 has been estimated and calculated, but at least one of the outside air temperature, the outside air temperature related value, the hot water set temperature, and the hot water set temperature related value is used for heat exchange for hot water supply. What is necessary is just to estimate and calculate the amount of heat supplied by the vessel 3. According to this, since it is not necessary to calculate the actual heat amount supplied by the hot water supply heat exchanger 3, it is possible to simplify the control.

  The values related to at least one of the outside air temperature and the hot water temperature include the temperature of the water flowing into the hot water heat exchanger 3, the temperature of the hot water boiled in the hot water heat exchanger, and the hot water heat exchanger 3. The flow rate of water to be used, the rotational speed (frequency) of the compressor 2, the amount of decompression of the decompression device (decompression unit) 4, and the like.

It is a schematic diagram which shows schematic structure of the heat pump type hot water supply apparatus in 1st Embodiment to which this invention is applied. It is a flowchart which shows the general | schematic control operation at the time of the hot water supply of the control apparatus 100 in 1st Embodiment. It is a graph which shows the operation example of the heat pump type hot-water supply apparatus in 1st Embodiment, (a) is the flow volume of the hot water boiled in the heat exchanger 3 for hot water supply, (b) is the hot water mixed from the hot water storage tank 10. The flow rate, (c) shows the flow rate of hot water after mixing the two. It is a graph which shows the operation | movement modification of a heat pump type hot-water supply apparatus, (a) is the flow volume of the hot water boiled in the heat exchanger 3 for hot water supply, (b) is the flow volume of the hot water mixed from the hot water storage tank 10, (c). Indicates the flow rate of hot water after mixing the two. It is a graph which shows the operation | movement modification of a heat pump type hot-water supply apparatus, (a) is the flow volume of the hot water boiled in the heat exchanger 3 for hot water supply, (b) is the flow volume of the hot water mixed from the hot water storage tank 10, (c). Indicates the flow rate of hot water after mixing the two. It is a graph which shows the operation | movement modification of a heat pump type hot-water supply apparatus, (a) is the flow volume of the hot water boiled in the heat exchanger 3 for hot water supply, (b) is the flow volume of the hot water mixed from the hot water storage tank 10, (c). Indicates the flow rate of hot water after mixing the two. It is a schematic diagram which shows schematic structure of the heat pump type hot water supply apparatus in 3rd Embodiment. It is a flowchart which shows the general | schematic control operation at the time of hot water supply of the control apparatus 100 in 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat pump apparatus 2 Compressor 3 Heat exchanger for hot water supply 4 Decompression apparatus (decompression means)
5 Evaporator (heat exchanger for heat source)
7 Temperature thermistor (outside temperature detection means)
10 Hot water storage tank 12a Flow control valve (first flow control means)
16a pump (first flow rate adjusting means)
17 Valve (second flow rate adjusting means)
30 temperature thermistor (feed water temperature detection means)
31 Temperature thermistor (boiling temperature detection means)
100 Control device (control means)
110 Operation panel (hot water temperature setting means)

Claims (10)

A compressor (2), a hot water supply heat exchanger (3), a pressure reducing means (4), and a heat source heat exchanger (5) are connected so that the refrigerant can circulate in the hot water supply heat exchanger (3). A heat pump device (1) that boiles water by heat exchange with the refrigerant to make hot water for hot water supply;
First flow rate adjusting means (16a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3);
A hot water storage tank (10) for storing hot water for hot water supply inside,
When performing hot water supply, second flow rate adjusting means (17) for adjusting the flow rate of hot water from the hot water storage tank (10) mixed with hot water from the hot water supply heat exchanger (3);
Control means (100) for controlling the heating operation by the heat pump device (1), controlling the flow rate by the first flow rate adjusting means (16a), and controlling the flow rate by the second flow rate control means (17). A heat pump type hot water supply device comprising:
The control means (100)
The first flow rate adjusting means (16a) is adjusted so that the flow rate of water flowing into the hot water supply heat exchanger (3) increases as the amount of heat supplied by the hot water supply heat exchanger (3) increases. Control
When the amount of heat is equal to or greater than a predetermined value, the second flow rate adjusting means (17) is controlled so that the flow rate of hot water from the hot water storage tank (10) is smaller than when the amount of heat is less than the predetermined value. A heat pump type hot water supply device characterized by that.   The control means (100) includes a temperature of water flowing into the hot water supply heat exchanger (3), a temperature of hot water heated by the hot water supply heat exchanger (3), and the hot water supply heat exchanger ( The heat pump type hot water supply apparatus according to claim 1, wherein the heat quantity is calculated based on a flow rate of water flowing into 3) or a related value thereof.   The said control means (100) estimates and calculates the said calorie | heat amount using at least 1 or more of outside temperature, hot water supply preset temperature, and at least any one of those related values. Heat pump water heater. A compressor (2), a hot water supply heat exchanger (3), a pressure reducing means (4), and a heat source heat exchanger (5) are connected so that the refrigerant can circulate in the hot water supply heat exchanger (3). A heat pump device (1) that boiles water by heat exchange with the refrigerant to make hot water for hot water supply;
First flow rate adjusting means (16a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3);
A hot water storage tank (10) for storing hot water for hot water supply inside,
When performing hot water supply, second flow rate adjusting means (17) for adjusting the flow rate of hot water from the hot water storage tank (10) mixed with hot water from the hot water supply heat exchanger (3);
Control means (100) for controlling the heating operation by the heat pump device (1), controlling the flow rate by the first flow rate adjusting means (16a), and controlling the flow rate by the second flow rate control means (17). A heat pump type hot water supply device comprising:
The control means (100)
The first flow rate adjusting means (16a) is adjusted so that the flow rate of water flowing into the hot water supply heat exchanger (3) increases as the amount of heat supplied by the hot water supply heat exchanger (3) increases. Control
After the elapse of a predetermined time after starting the boiling operation by the heat pump device (1), the second flow rate adjustment is performed such that the flow rate of hot water from the hot water storage tank (10) is reduced from before the elapse of the predetermined time. A heat pump type hot water supply apparatus characterized by controlling the means (17).   The heat pump hot water supply apparatus according to claim 4, wherein the control means (100) changes the predetermined time based on an outside air temperature or a related value.   The said 1st flow volume adjustment means (16a) is a pump means (16a) which pumps the discharged water to the said hot water supply heat exchanger (3), The any one of Claim 1 thru | or 5 characterized by the above-mentioned. The heat pump type hot water supply device described in 1.   The first flow rate adjusting means (12a) is a flow rate adjusting valve (12a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3) by adjusting an opening degree. The heat pump type hot water supply apparatus according to any one of claims 1 to 5.   The heat pump hot water supply apparatus according to any one of claims 1 to 7, wherein the refrigerant is carbon dioxide and is pressurized to a critical pressure or higher by the compressor (2). The compressor (2), the hot water supply heat exchanger (3), the pressure reducing means (4), and the heat source heat exchanger (5) are connected so that the refrigerant can circulate in the hot water supply heat exchanger (3). A heat pump device (1) for boiling water by heat exchange with the refrigerant to make hot water for hot water supply, and a first flow rate adjusting means (16a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3); A hot water storage tank (10) for storing hot water for hot water supply therein and a hot water supply from the hot water storage tank (10) mixed with the hot water from the hot water supply heat exchanger (3) when hot water supply is performed In a heat pump type hot water supply device comprising two flow rate adjusting means (17),
A control device for a heat pump type hot water supply apparatus for controlling the heating operation by the heat pump device (1), controlling the flow rate by the first flow rate adjusting means (16a), and controlling the flow rate by the second flow rate control means (17). Because
The first flow rate adjusting means (16a) is adjusted so that the flow rate of water flowing into the hot water supply heat exchanger (3) increases as the amount of heat supplied by the hot water supply heat exchanger (3) increases. Control
When the amount of heat is equal to or greater than a predetermined value, the second flow rate adjusting means (17) is controlled so that the flow rate of hot water from the hot water storage tank (10) is smaller than when the amount of heat is less than the predetermined value. A control device for a heat pump type hot-water supply device. The compressor (2), the hot water supply heat exchanger (3), the pressure reducing means (4), and the heat source heat exchanger (5) are connected so that the refrigerant can circulate in the hot water supply heat exchanger (3). A heat pump device (1) for boiling water by heat exchange with the refrigerant to make hot water for hot water supply, and a first flow rate adjusting means (16a) for adjusting the flow rate of water flowing into the hot water supply heat exchanger (3); A hot water storage tank (10) for storing hot water for hot water supply therein and a hot water supply from the hot water storage tank (10) mixed with the hot water from the hot water supply heat exchanger (3) when hot water supply is performed In a heat pump type hot water supply device comprising two flow rate adjusting means (17),
A control device for a heat pump type hot water supply apparatus for controlling the heating operation by the heat pump device (1), controlling the flow rate by the first flow rate adjusting means (16a), and controlling the flow rate by the second flow rate control means (17). Because
The first flow rate adjusting means (16a) is adjusted so that the flow rate of water flowing into the hot water supply heat exchanger (3) increases as the amount of heat supplied by the hot water supply heat exchanger (3) increases. Control
After the elapse of a predetermined time after starting the boiling operation by the heat pump device (1), the second flow rate adjustment is performed such that the flow rate of hot water from the hot water storage tank (10) is reduced from before the elapse of the predetermined time. A control device for a heat pump type hot water supply device, characterized by controlling the means (17).

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