JP4453662B2 - Heat pump type water heater - Google Patents

Heat pump type water heater Download PDF

Info

Publication number
JP4453662B2
JP4453662B2 JP2006015624A JP2006015624A JP4453662B2 JP 4453662 B2 JP4453662 B2 JP 4453662B2 JP 2006015624 A JP2006015624 A JP 2006015624A JP 2006015624 A JP2006015624 A JP 2006015624A JP 4453662 B2 JP4453662 B2 JP 4453662B2
Authority
JP
Japan
Prior art keywords
hot water
compressor
water supply
heat pump
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2006015624A
Other languages
Japanese (ja)
Other versions
JP2007198632A (en
Inventor
丈二 黒木
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to JP2006015624A priority Critical patent/JP4453662B2/en
Publication of JP2007198632A publication Critical patent/JP2007198632A/en
Application granted granted Critical
Publication of JP4453662B2 publication Critical patent/JP4453662B2/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Description

  The present invention relates to a heat pump type hot water supply apparatus that heats water by a heat pump apparatus to make hot water.

  As a conventional heat pump type hot water supply apparatus, for example, one disclosed in Patent Document 1 is known. That is, the hot water supply apparatus includes a heat pump cycle, a hot water storage tank, and a maximum heating amount control means. For example, when the hot water supply load or the bath pouring load is large, the heating amount of the heat pump cycle is controlled by the maximum heating amount control means. I try to maximize it. Specifically, increase the flow rate of hot water flowing through the hot water heat exchanger so that the hot water temperature at the hot water outlet side of the hot water heat exchanger is lower than the hot water set temperature or bath pouring set temperature. However, the maximum heating operation is performed by setting the rotation speed of the compressor in the heat pump cycle to the upper limit rotation speed.

As a result, during combined operation with the hot water storage tank, the remaining amount of hot water in the hot water storage tank is secured to the maximum to prevent hot water from running out.
JP-A-2005-241206

  However, in the above prior art, since the hot water supply operation is performed at the upper limit rotation speed of the compressor, problems such as a decrease in the durability of the compressor and an increase in noise to the user occur. In addition, during the maximum heating operation, if there is a load fluctuation in the heat pump cycle due to the user's amount of tapping water, in order to ensure the boiling temperature and cycle stability, a circulating pump for hot water supply, a pressure reducing valve for the heat pump cycle, etc. Each functional product is controlled, but at that time a control follow-up delay occurs, the system load exceeds an abnormal value (for example, the boiling temperature exceeds 100 ° C, etc.), There is concern that it will lead to a decline. In view of the above problems, an object of the present invention is to ensure the reliability of the compressor, reduce the noise level, and to ensure the system reliability against the sudden load fluctuation of the heat pump cycle due to external factors It is in providing a hot water supply apparatus.

  In order to achieve the above object, the present invention employs the following technical means.

In the first aspect of the present invention, a hot water storage tank (10) for storing hot water for hot water supply, a compressor (21), a radiator (22), a pressure reducing valve (23), and an evaporator (24) are sequentially connected. A heat pump device (20) in which the refrigerant is circulated by the compressor (21),
Control means (40) for controlling the operation of the compressor (21),
Heat pump hot water supply that performs hot water supply operation in which hot water is heated by heat radiation of the radiator (22) and the heated hot water is directly supplied to the hot water supply terminal , and hot water storage operation in which the heated hot water is stored in the hot water storage tank (10). In the device
The control means (40) operates the compressor (21) between a lower limit side rotational speed that secures a predetermined heating capacity as the heat pump device (20) and an upper limit side rotational speed that is a predetermined amount lower than the maximum rotational speed. In addition , the compressor (21) is operated by changing the rotational speed of the compressor (21) to a lower side as the amount of stored hot water in the hot water storage tank (10) is larger .
The heating capability as a heat pump apparatus (20) is securable by making the rotation speed of a compressor (21) more than a lower limit side rotation speed.
Further, by setting the rotation speed of the compressor (21) to be equal to or lower than the upper limit rotation speed, it becomes possible to improve the reliability of the compressor (21) and reduce noise, and when the load of the heat pump apparatus (20) fluctuates, 20) Even if control follow-up delay and hot water temperature overshoot occur due to the control for stabilization operation of 20), the compressor (21) can be provided with a margin for operating on the low rotation side. The load of the heat pump device (20) does not exceed the abnormal value, and the reliability of the heat pump device (20) can be ensured.
Further, as the amount of stored hot water in the hot water storage tank (10) is larger, hot water can be discharged using the hot water in the hot water storage tank (10), so that the rotation speed of the compressor (21) is the heat pump device (20) side. Can be reduced. Therefore, the reliability of the compressor (21) can be improved and the noise can be reduced, and the reliability of the heat pump device (20) can be ensured.
In the second aspect of the invention, the control means (40) decreases the rotational speed of the compressor (21) as the outside air temperature, the hot water temperature, or the refrigerant temperature in the evaporator (24) increases. It is variable and operates the compressor (21).

  When the outside air temperature, hot water temperature, and refrigerant temperature are high, the suction side pressure (low pressure side pressure) of the compressor (21) can be set high, and the refrigerant density can be increased to increase the refrigerant circulation amount. The heating capability by the heat pump device (20) can be increased. Therefore, even if the rotation speed of the compressor (21) is changed to the lower side, the same heating capacity can be ensured, and the reliability of the compressor (21) is improved by reducing the rotation speed, and noise is reduced. be able to.

  Further, by operating the compressor (21) at a reduced speed, when the load of the heat pump device (20) fluctuates, control follow-up delay and hot water temperature are controlled by the control for stabilizing the heat pump device (20). Even if overshoot occurs, since the compressor (21) is operated on the low rotation side, a margin can be provided, so that the load of the heat pump device (20) does not exceed the abnormal value, and the heat pump The reliability of the device (20) can be ensured.

The invention described in claim 3 is characterized by having temperature detecting means (32, 33) for detecting either the outside air temperature, the temperature of the hot water supply, or the temperature of the refrigerant.

  As a result, the outside air temperature, the hot water temperature or the refrigerant temperature can be reliably detected.

In the invention according to claim 4 , the control means (40) increases the rotational speed of the compressor (21) when performing a defrosting operation for removing frost generated in the evaporator (24) in winter. It is characterized by.

  Thereby, a defrosting operation can be performed without reducing the defrosting ability.

In the invention according to claim 5 , the control means (40) increases the rotational speed of the compressor (21) to a predetermined upper limit side rotational speed in a time zone in which hot water is frequently used in a time zone of one day. In addition, when the hot water usage frequency is low during the day, the compressor (21) is operated by reducing the rotational speed of the compressor (21) to a predetermined lower limit rotational speed. is doing.

  Thereby, hot water supply according to the usage frequency of hot water becomes possible, and in the time zone when the usage frequency of hot water is low, by reducing the rotation speed of the compressor (21), the invention according to claim 1, The reliability of the compressor (21) can be improved and the noise can be reduced, and the reliability of the heat pump device (20) can be ensured.

According to the sixth aspect of the present invention, a time zone in which hot water is used frequently and a time zone in which hot water is used are set in advance, and a timer for grasping the passage of time of one day is provided, and the control means (40 ) Is characterized in that a time zone in which hot water usage is high and a time zone in which hot water usage is low are discriminated by a timer.
Thereby, the rotation time control of a compressor (21) is attained by grasping | ascertaining reliably the time slot | zone when hot water use frequency is high, and the time slot | zone when hot water use frequency is low.

In the invention described in claim 7 , a hot water storage tank (10) for storing hot water for hot water supply, a compressor (21), a radiator (22), a pressure reducing valve (23), and an evaporator (24) are sequentially connected. The heat pump device (20) in which the refrigerant is circulated by the compressor (21) and the control means (40) for controlling the operation of the compressor (21) are provided, and hot water is supplied by the heat radiation of the radiator (22). In a heat pump type hot water supply apparatus that performs a direct hot water supply operation in which heated hot water is directly supplied to a hot water supply terminal, and a hot water storage operation in which heated hot water is stored in a hot water storage tank (10).
The control means (40) operates the compressor (21) between a lower limit side rotational speed that secures a predetermined heating capacity as the heat pump device (20) and an upper limit side rotational speed that is a predetermined amount lower than the maximum rotational speed. As well as
When the boiling water set temperature set by the user is low, the rotation speed of the compressor (21) is increased to a predetermined upper limit rotation speed, and when the boiling setting temperature is high, the compressor ( 21), the compressor (21) is operated by lowering the rotational speed to a predetermined lower limit rotational speed.
Thereby, the efficiency (COP) of the heat pump device (20) can be maintained at a high level to supply hot water. And when boiling setting temperature is high, the reliability improvement and noise reduction of a compressor (21) are possible like the invention of Claim 1 by reducing the rotation speed of a compressor (21). In addition, the reliability of the heat pump device (20) can be ensured.

In invention of Claim 8 , while being controlled by the control means (40), hot water heated by the radiator (22) and hot water stored in the hot water storage tank (10) are mixed in a predetermined ratio, It has a mixing means (13) for discharging the mixed hot water to a hot water supply terminal.
Thereby, the heat pump device (20) can be operated by effectively utilizing the hot water stored in the hot water storage tank (10). And the more hot water in the hot water storage tank (10), the more the compressor (21) can be operated, and the reliability of the compressor (21) is improved as in the invention according to claim 1, Noise can be reduced, and the reliability of the heat pump device (20) can be ensured.

In invention of Claim 9 , it has the calorie | heat amount detection means (35a-35c) which detects the amount of hot water storage in the hot water storage tank (10), and a control means (40) is detected by the calorie | heat amount detection means (35a-35c). The mixing means (13) is controlled according to the amount of stored hot water.
Thereby, the hot water stored in the hot water storage tank (10) can be used effectively, and the heating capacity of the heat pump device (20) can be operated with the minimum necessary.

In the invention according to claim 10 , the control means (40) is configured to stop the hot water supply to the hot water supply terminal when the hot water storage heat quantity detected by the heat quantity detection means (35a to 35c) is smaller than the predetermined heat quantity. The hot water storage operation is performed by continuously operating the compressor (21).
Thus, by always maintaining the necessary amount of stored hot water in the hot water storage tank (10), the hot water storage tank at the beginning of the instantaneous hot water supply operation, the cold water hot water of the heat pump device (20), and the lack of heating due to frosting in the evaporator (24) (10) It can be supplemented with hot water in the interior, and user convenience can be improved.

According to the eleventh aspect of the present invention, there is provided a tapping state detecting means (37) for detecting a tapping state of the hot water discharged from the hot water supply terminal, and the control means (40) indicates that the detection result by the tapping state detecting means (37) If it determines with it being in a state, it is characterized by operating a compressor (21).

  Thereby, boiling of hot water corresponding to the use of the user's hot water becomes possible, and the hot water supply device (100) that is easy to use for the user can be obtained.

The invention according to claim 12 is characterized in that the pressure reducing valve (23) is a variable pressure reducing valve (40) whose valve opening degree is controlled by the control means (40).

  Accordingly, the high pressure side pressure of the heat pump device (20) and the refrigerant temperature corresponding to the high pressure side pressure can be controlled by the valve opening degree control of the pressure reducing valve (23), so that efficient boiling of hot water becomes possible.

In invention of Claim 13 , while being controlled by the temperature detection means (31) which detects the boiling temperature of the hot water heated with the heat radiator (22), and a control means (40), a heat radiator (22) And a flow rate adjusting means (27) for adjusting the flow rate of the hot water supplied to the water.

Thereby, the flow rate of hot water supply can be adjusted according to the boiling temperature, and efficient boiling of hot water becomes possible.
The invention according to claim 14 is characterized in that the compressor (21) compresses and discharges the refrigerant to a critical pressure or higher.

  Thereby, the refrigerant | coolant temperature in the heat radiator (22) in a heat pump apparatus (20) can be made higher, and the heating capability with respect to hot water supply can be increased.

And like invention of Claim 15 , as a refrigerant | coolant, specifically, it can be set as a carbon dioxide.

  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.

(First embodiment)
Hereinafter, the heat pump type hot water supply apparatus 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram showing the overall configuration of a heat pump type hot water supply apparatus 100 to which the present invention is applied, and FIG. 2 shows the rotation speed with respect to the outside air temperature used when the control apparatus 40 determines the rotation speed of the compressor 21. It is a control characteristic figure which shows a relationship.

  A heat pump type hot water supply apparatus (hereinafter referred to as a hot water supply apparatus) 100 of this embodiment is used for general household use, and stores hot water generated by the heat pump unit 20 in the hot water storage tank 10 and also stores the stored hot water. As hot water for hot water supply, it is supplied to hot water terminals such as kitchens, washrooms, and baths.

  As shown in FIG. 1, a hot water supply device 100 includes a hot water storage tank 10 in which hot water (tap water) is supplied to the lowermost portion thereof by an introduction pipe 11, and the lowermost hot water in the hot water storage tank 10. A circulation circuit 26 to be sent to the top of the inside, a heat pump unit (corresponding to the heat pump device in the present invention) 20 for directly heating hot water flowing through the circulation circuit 26, and hot water in the hot water storage tank 10 outside the hot water storage tank 10 Various pipes 12, 14, and 16 to be sent and a control device (corresponding to the control means in the present invention) 40 for controlling the operation of the hot water supply system are provided, thereby exhibiting a hot water supply function.

  The hot water storage tank 10 is a container for storing hot water for hot water supply, and is made of a metal having excellent corrosion resistance (for example, stainless steel). Can be kept warm.

  The hot water storage tank 10 has a vertically long shape and is provided with an introduction port 10a on the bottom surface. An introduction pipe 11 serving as an introduction flow path for supplying hot water into the hot water storage tank 10 is connected to the introduction port 10a. Yes. The introduction pipe 11 is provided with a water supply thermistor 33 as temperature detecting means, and the water supply thermistor 33 outputs a temperature signal in the introduction pipe 11 (hot water supply water) to a control device 40 (system control device 42) described later. It is like that. The introduction pipe 11 is provided with a pressure reducing check valve (not shown) for adjusting the water pressure of the hot water to be introduced to a predetermined pressure and preventing the back flow of the hot water in the case of water interruption or the like.

  On the other hand, an inlet / outlet port 10b is provided at the uppermost part of the hot water storage tank 10, and hot water generated by a heat pump unit 20 described later is introduced into the hot water storage tank 10 into the inlet / outlet port 10b. A high-temperature pipe 12 is connected as a hot water supply passage for deriving hot water stored in the hot water. The anti-hot water storage tank side of the high temperature pipe 12 is connected to a mixing valve 13 described later.

  A discharge pipe provided with a relief valve (not shown) is connected in the middle of the route of the high-temperature pipe 12, and when the pressure in the hot water storage tank 10 rises above a predetermined pressure, The hot water is discharged to the outside so that the hot water storage tank 10 and the like are not damaged.

  On the outer wall surface of the hot water storage tank 10, a plurality of (three in this example) hot water storage thermistors 35a to 35c serving as heat amount detecting means for detecting the amount of hot water stored in the hot water storage tank 10 from the amount of stored hot water and the stored hot water temperature are provided in the vertical direction ( The hot water storage tanks 10 are arranged at substantially equal intervals in the height direction of the hot water storage tank 10. The hot water storage thermistors 35a to 35c are configured to output a temperature signal at each water level filled in the hot water storage tank 10 to a control device 40 (system control device 42) described later.

  Therefore, based on the temperature signal from hot water storage thermistors 35a to 35c, control device 40 determines the boundary position between the hot water heated up inside hot water storage tank 10 and the hot water supplied before boiling down hot water storage tank 10. In addition to being able to detect this, the amount of stored hot water can be detected.

  Of these hot water storage thermistors 35 a to 35 c, the hot water storage thermistor 35 a is provided on the outermost wall surface of the hot water storage tank 10, and is the innermost in the hot water storage tank 10 that is the temperature of the hot water sucked into the high temperature pipe 12. It also has the function of a hot water thermistor that detects the temperature of the hot water at the top.

  At the lower part of the hot water storage tank 10, there is provided a suction port 10c for sucking the lowermost hot water in the hot water storage tank 10 into the heat pump unit 20 described later. The suction port 10 c and a mixing valve 13 described later are connected by a circulation circuit 26, and a part of the circulation circuit 26 is disposed in the heat pump unit 20.

  The mixing valve 13 is a mixing means in which three flow paths communicate with each other at the center from the outside and the valve opening degree of each flow path can be adjusted. The valve opening degree of each flow path is It is controlled by a control device 40 (system control device 42) described later. Of the three flow paths of the mixing valve 13, the first flow path is connected to the anti-hot water storage tank side of the high-temperature pipe 12, and the second flow path is connected to the downstream side of the circulation circuit 26. A hot water supply pipe 14 is connected to the eye channel.

  The hot water supply pipe 14 is provided with a hot water temperature thermistor 34 for detecting the temperature of the hot water flowing through the hot water supply pipe 14, and the downstream side of the hot water supply pipe 14 is connected to a hot water supply mixing valve 15 described later. The temperature signal detected by the hot water temperature thermistor 34 is output to a control device 40 (system control device 42) described later.

  The valve openings of the three flow paths of the mixing valve 13 are controlled based on temperature signals detected by the hot water storage thermistors 35a to 35c, the hot water temperature thermistor 34, and a boiling temperature thermistor 31 described later. More specifically, the control patterns of the valve openings of the three flow paths of the mixing valve 13 are the following three types. That is, the first is that the flow path on the high temperature pipe 12 side and the circulation circuit 26 side is opened, the flow path on the hot water supply pipe 14 side is closed, and hot water generated by the heat pump unit 20 described later is a hot water storage tank. 10 is a first pattern (hot water storage pattern) that is stored in 10. Second, all of the high-temperature pipe 12 side, the circulation circuit 26 side, and the hot water supply pipe 14 side are opened, and the valve openings of the high-temperature pipe 12 side and the circulation circuit 26 side are distributed at a predetermined ratio, so that hot water storage is performed. It is the 2nd pattern (tank auxiliary hot water supply pattern) by which the hot water from the tank 10 and the heat pump unit 20 mentioned later is mixed by the predetermined ratio, and is supplied to the hot water supply terminal side. Third, the flow path on the circulation circuit 26 side and the hot water supply pipe 14 side is opened, the flow path on the high temperature pipe 12 side is closed, and hot water generated by the heater pump unit 20 described later is directly supplied with hot water. It is a 3rd pattern (direct hot-water supply pattern) supplied to the terminal side.

  The introduction pipe 11 is provided with a water supply pipe 11a branched from the front part of the introduction port 10a, and the downstream end of the water supply pipe 11a is connected to a hot water supply mixing valve 15 described later.

  The hot water supply mixing valve 15 is a temperature adjustment valve that adjusts the temperature of hot water discharged from the terminal pipe 16 connected thereto to the hot water supply terminal. The valve opening on the hot water supply pipe 14 side and the valve on the water supply pipe 11a side are adjusted. The hot water temperature is adjusted by adjusting the ratio with the opening. The terminal pipe 16 is provided with a hot water supply thermistor 36 for detecting the temperature of hot water flowing therethrough, and the detected temperature signal is output to a control device 40 (system control device 42) described later. It has become. Then, the opening ratio of the hot water supply mixing valve 15 is adjusted so that the hot water temperature obtained by the hot water supply thermistor 36 becomes the set temperature set by the user from the temperatures obtained by the hot water thermistor 33 and the hot water temperature thermistor 34. It is controlled by (system controller 42).

  Further, the terminal pipe 16 is provided with a flow rate counter 37 for detecting the flow rate of hot water flowing therethrough, and the detected flow rate signal is output to a control device 40 (system control device 42) described later. It has become. The flow rate counter 37 corresponds to the hot water state detection means in the present invention, and the control device 40 determines that the hot water supply terminal is in the hot water state by detecting the flow rate.

The heat pump unit 20 includes a heat pump cycle 20 </ b > A that uses carbon dioxide (CO 2 ) having a low critical temperature as a refrigerant, and a feed water pump 27 installed in the circulation circuit 26. According to the supercritical heat pump, hot water having a temperature higher than that of a general heat pump cycle (for example, about 85 ° C. to 90 ° C.) can be stored in the hot water storage tank 10.

  The heat pump cycle 20A is composed of an electric compressor 21, a radiator 22, a pressure reducing valve 23, an evaporator 24, and an accumulator 25, which are sequentially connected by a refrigerant pipe. It is controlled by the control device 41).

  The compressor 21 is an electric rotary machine that compresses and discharges the refrigerant sucked from the accumulator 25 to a high pressure equal to or higher than the critical pressure, and is rotated by a built-in electric motor (not shown). The rotation speed of the compressor 21 is controlled by a control device 40 (heat pump control device 41) which will be described later so that a prescribed capacity is obtained under various operating conditions.

  The pressure reducing valve 23 is a pressure reducing means for reducing the pressure of the high-pressure refrigerant flowing out from the radiator 22 (details will be described later). Here, the valve opening degree is electrically controlled by a control device 40 (heat pump control device 41) described later. Variable pressure reducing valve.

  The evaporator 24 evaporates the refrigerant decompressed by the pressure reducing valve 23 by heat exchange with the outside air blown by the blower fan 24a for the evaporator 24 (by absorbing heat from the outside air), and causes the compressor 21 to gas refrigerant. Supply. The rotational speed of the blower fan 24a is controlled by a control device 40 (heat pump control device 41) described later so as to ensure the heat exchange performance of the evaporator 24.

  An outside air temperature thermistor 32 is provided on the outside air inflow side of the evaporator 24 as temperature detecting means for detecting the temperature of the outside air. The temperature signal detected by the outside temperature thermistor 32 is output to a control device 40 (heat pump control device 41) described later.

  The accumulator 25 gas-liquid separates the refrigerant flowing out of the evaporator 24, causes only the gas-phase refrigerant to be sucked into the compressor 21, and stores excess refrigerant in the cycle.

  The radiator 22 is a heat exchanger that heats hot water by using high-temperature and high-pressure refrigerant discharged from the discharge port of the compressor 21 (by dissipating the heat of the refrigerant) to make hot water. And a water side heat exchanger 22b. The refrigerant side heat exchanger 22a is configured by a refrigerant flow channel pipe through which a high-pressure gas refrigerant discharged from the discharge port of the compressor 21 flows.

  And the water side heat exchanger 22b is arrange | positioned so that the end surface may closely_contact | adhere to the surface which the said refrigerant | coolant side heat exchanger 22a opposes so that heat exchange is possible, and it becomes a two-layer structure. The water-side heat exchanger 22b is disposed in the circulation circuit 26, and is located between the refrigerant and hot water flowing through the circulation circuit 26 over the entire length of the refrigerant flow path from the refrigerant inlet to the refrigerant outlet of the refrigerant-side heat exchanger 22a. The hot water corresponding to the boiling temperature (about 65 ° C. to 90 ° C.) is generated from the outlet of the water side heat exchanger 22b.

  A boiling temperature thermistor 31 is provided on the outlet side of the water side heat exchanger 22b of the circulation circuit 26 as temperature detecting means for detecting the boiling temperature. The boiling temperature thermistor 31 detects the boiling temperature thermistor 31. The temperature signal is output to a control device 40 (heat pump control device 41) described later.

  And between the inlet 10c of the circulation circuit 26 and the water side heat exchanger 22b, the water supply pump 27 as a flow volume adjustment means is arrange | positioned. The water supply pump 27 is driven to rotate by a built-in electric motor (not shown), and sucks hot water from the suction port 10c when boiling the hot water, and supplies hot water heated in the water-side heat exchanger 22b. It operates to recirculate to the hot water storage tank 10 through the mixing valve 13 or to supply hot water to the hot water supply terminal side. The feed water pump 27 is controlled by a control device 40 (system control device 41), which will be described later, so that the water temperature on the outlet side of the water side heat exchanger 22b becomes a predetermined boiling set temperature determined under various operating conditions. The rotation speed is controlled.

  The flow rate adjusting means may be a flow rate adjusting valve that uses tap water pressure instead of the water supply pump 27.

  The heat pump unit 20 (the compressor 21, the pressure reducing valve 23, the blower fan 24a, and the water supply pump 27) uses AC power as a power source, and mainly uses midnight power in the midnight time zone where the charge setting is the cheapest. In addition to performing hot water storage operation in which the hot water in the hot water 10 is boiled and stored, even in the daytime hours, the hot water temperature at the top of the hot water storage tank 10 and the amount of hot water decrease directly or in the hot water storage tank 10. It is controlled to perform a direct hot water supply operation in which it is mixed with hot water and supplied to the hot water supply terminal.

  The control device 40, which is a control means, includes a heat pump control device 41 and a system control device 42. The heat pump control device 41 is disposed on the heat pump unit 20 side, and the system control device 42 is disposed on the hot water storage tank 10 side. Has been placed. The control means 40 is mainly composed of a microcomputer, and a built-in ROM (not shown) is provided with a preset control program, and the temperature from each of the thermistors 31 to 34, 35a to 35c, 36. Various mixing valves 13 and 15, heat pump unit 20 (compressor 21, pressure reducing valve 23, blower fan 24a, hot water supply) based on the signal, the flow rate signal from flow rate counter 37, the operation signal from operation panel 43 input by the user, etc. It is configured to control the pump 27).

  The operation panel 43 is provided with a power switch, a hot water supply set temperature switch, a hot water filling switch, a hot water filling set temperature switch, and the like as operation switches. The operation panel 43 is installed in the vicinity of a place where hot water is used such as in a bathroom or kitchen.

  Next, the operation of the hot water supply apparatus 100 configured as described above will be described.

  The control device 40 operates the heat pump unit 20 using inexpensive late-night power during the midnight hours, switches the valve opening of the mixing valve 13 to the first pattern (hot water storage pattern), and circulates hot water to the circulation circuit 26. Heated by the radiator 22, the generated hot (65 ° C. to 90 ° C.) hot water is stored from the upper part of the hot water storage tank 10 through the mixing valve 13 (hot water storage operation).

  In the hot water storage operation by the heat pump unit 20, the control device 40 increases the operating efficiency of the heat pump cycle 20A and sets the temperature of the hot water obtained by the boiling temperature thermistor 31 to the boiling set temperature. The heat pump unit 20 is operated by adjusting the rotation speed of the water supply pump 27, the blower fan 24a, and the valve opening degree of the pressure reducing valve 23.

  When the user uses hot water during the daytime period, the amount of hot water used at that time (the flow rate obtained by the flow rate counter 37) and the amount of hot water stored in the hot water storage tank 10 (the hot water temperature and the amount of hot water obtained by the hot water storage thermistors 35a to 35c). ), The mixing valve 13 is switched to the second pattern (tank auxiliary hot water supply pattern), and the generated hot water is stored by operating the heat pump unit 20 while preferentially using the hot water in the hot water storage tank 10. The hot water in the tank 10 is mixed and discharged to the hot water supply pipe 14 side (tank auxiliary hot water supply operation).

  Here, when the amount of hot water in the hot water storage tank 10 falls below a predetermined minimum amount of stored hot water (predetermined amount of heat), the control device 40 switches the mixing valve 13 to the third pattern (direct instantaneous hot water supply pattern), and the heat pump unit 20. The hot water generated in step 1 is discharged directly to the hot water supply pipe 14 side (direct hot water supply operation).

  The control device 40 adjusts the valve opening of the mixing valve 13 so that the temperature of the hot water discharged to the hot water supply pipe 14 becomes a predetermined temperature (set temperature +2 to 5 ° C. obtained from the operation panel 43), or a heat pump. The heating capacity of the unit 20 (the compressor 21, the rotation speed of the feed water pump 27, etc.) is adjusted. Furthermore, the temperature of the hot water obtained by the hot water supply thermistor 36 is adjusted by mixing the hot water flowing through the hot water supply pipe 14 by adjusting the valve opening of the mixing valve 15 and the hot water flowing through the water supply pipe 11a. Then, the hot water is discharged from the terminal pipe 16 to the hot water supply terminal side.

  Here, in the present embodiment, the control device 40 controls the rotational speed of the compressor 21 (hereinafter referred to as the compressor rotational speed) when operating the heat pump unit 20 by determining it from the control characteristic diagram shown in FIG. I have to. That is, the control characteristic diagram relates the outside air temperature and the compressor rotation speed, and the higher the outside air temperature, the lower the compressor rotation speed. More specifically, since the heating capacity as the heat pump unit 20 is required to be larger in the winter when the outside air temperature is low, the compressor rotation speed is set as the maximum rotation speed of the compressor 21, and the following year At the outside temperature corresponding to the intermediate period (spring, autumn) to the summer period, the compressor rotational speed is gradually decreased.

  That is, when the outside air temperature is high, the suction side pressure (low pressure side pressure) of the compressor 21 can be set high, and the refrigerant density can be increased to increase the amount of refrigerant circulation. Can be increased. Therefore, even if the rotation speed of the compressor 21 is varied to the lower side, the same heating capacity can be secured.

  As a result, when the heat pump unit 20 is operated during the daytime period, the compressor 21 is operated at a rotational speed lower than the maximum rotational speed in the intermediate and summer periods to generate hot water. In the intermediate and summer seasons, there are many cases where the windows of the house are opened, and the noise of the compressor 21 is likely to reach the user himself or his neighbor in the daytime period. Especially in confined areas such as urban areas, noise complaints from neighbors are likely to occur. Therefore, the incidence rate of noise complaints can be reduced by operating the compressor at a lower rotational speed as the outside air temperature increases.

  Further, when the outside air temperature is high as in summer, the atmosphere temperature of the heat pump unit 20 becomes high, and if the compressor 21 is operated at the maximum rotation speed, an electric motor for driving, an inverter for control (heat pump control device 41), etc. Since the temperature of the electrical component rises abnormally, the probability of deterioration or failure of each component increases. Therefore, the higher the outside air temperature is, the lower the compressor rotational speed is, so that the deterioration and failure can be suppressed and the durability of each component can be improved.

  Further, by reducing the rotational speed of the compressor, it is possible to reduce the wear of the sliding portion in the compressor 21 and improve the wear durability of the compressor 21 itself.

  Further, when the outside air temperature is high, the suction side pressure (low pressure side pressure) of the compressor 21 is increased, and accordingly, the refrigerant density is increased and the refrigerant circulation amount is increased, so that the radiator 22, the pressure reducing valve 23, It becomes necessary to increase the size of the evaporator 24 and the like, leading to an increase in size and cost of the heat pump unit 20. However, the increase in size and cost can be prevented by lowering the rotational speed of the compressor.

  Further, when the outside air temperature is high, the temperature of the hot water supply water is also high. From the following Equation 1, when the boiling set temperature is fixed, the hot water supply water circulation amount increases as the hot water supply water temperature increases.

(Equation 1)
Q = L × ΔT
However, Q is a heating capacity, L is a hot-water supply circulation flow rate, and ΔT is (boiling set temperature−hot-water supply water temperature).

  Here, in order to increase the hot water circulation amount, there is a concern that the feed water pump 27 is enlarged and the boiling temperature controllability is lowered due to the enlargement of the feed water pump 27. Decreasing boiling temperature controllability means that control follow-up delay and hot water overshoot are likely to occur due to control for stabilizing operation of the heat pump unit 20 when the load of the heat pump unit 20 fluctuates. However, when the hot water temperature is high with the outside air temperature, it is possible to reduce the heating capacity by reducing the compressor rotation speed, thereby suppressing the hot water circulation amount. It is possible to prevent a decrease in boiling temperature controllability associated with an increase in size.

  In the control characteristic diagram described with reference to FIG. 2, the compressor rotational speed is determined based on the outside air temperature, but the hot water temperature obtained by the feed water thermistor (temperature detecting means) 33 instead of the outside air temperature, or You may make it determine based on the refrigerant | coolant temperature in the evaporator 24. FIG. That is, the higher the hot water temperature and the refrigerant temperature, the lower the compressor speed.

  For example, when removing frost generated in the heat exchange section of the evaporator 24 in winter, the compressor rotational speed determined by the outside air temperature at that time may be increased by a predetermined amount during the defrosting. .

(Second Embodiment)
A second embodiment of the present invention is shown in FIGS. In the second embodiment, the configuration of the hot water supply device 100 is the same as that of the first embodiment, and the setting of the compressor rotational speed in the direct hot water supply operation is characterized.

  In the direct hot water supply operation, hot water is discharged directly to the hot water supply terminal, and the amount of hot water discharged to the user is large. Therefore, the heat pump unit 20 also has a compressor 21 that is determined by the upper limit capacity of the heat pump cycle 20A, the circulation circuit 26, various electrical components, and the like. It is ideal to perform the boiling operation at the maximum heating capacity at the maximum rotation speed.

  As shown in FIG. 3, first, the compressor rotational speed determined by the maximum output 100% of the feed water pump 27 is set as the maximum rotational speed of the compressor 21. At this time, the opening degree of the pressure reducing valve 23 and the current value of the inverter for controlling the electric motor that drives the compressor 21 are more than a predetermined margin with respect to the maximum rotational speed of the compressor 21 than the respective upper limit values. It is set to have.

  Here, as shown in FIG. 4, during the hot water supply operation, the amount of hot water supplied by the water supply pump 27 and the boiling temperature of the heat pump device 20 vary depending on the start-up startability and how the user uses the hot water supply terminal. For example, if the boiling setting temperature (target temperature) is 90 ° C. and the abnormality occurrence temperature is 100 ° C. (boiling point of hot water), overheating of the boiling temperature occurs at startup or when the amount of hot water used changes.

  In the present embodiment, the compressor rotational speed is operated as a setting of an upper limit rotational speed that is lower by a predetermined amount than the maximum rotational speed. More specifically, as shown in FIG. 6, when the stable output of the feed water pump 27 with respect to the boiling set temperature (90 ° C.) is 90%, the compressor rotational speed is 95% of the maximum rotational speed (upper limit side). The number of rotations). The boiling temperature rises to 100 ° C. by the speed increasing operation output of the remaining 10% of the pump output, but normally converges to 90 ° C. Therefore, when the pump output is 90%, the boiling temperature does not exceed 100 ° C., and the abnormal stop of the hot water supply device 100 can be eliminated.

  That is, as shown in FIG. 5, when the maximum heating capacity is set at the maximum rotation speed of the compressor 21 and the output when the pump is stable with respect to the boiling target temperature is 100%, the pump against the overshoot of the boiling temperature. Since the output is fixed at the maximum, the boiling temperature exceeds 100 ° C., leading to an abnormal stop (FIG. 6). Such an abnormal stop can be prevented by setting the compressor rotational speed to 95% or less of the maximum rotational speed at a pump output of 90% as in the present embodiment.

  Although FIGS. 3 to 6 show an example of determining the set value of the compressor speed based on the boiling temperature, the discharge temperature, discharge pressure, and inverter current value adjusted by the variable pressure reducing valve 23 are shown. Can also determine the set value of the compressor speed. FIG. 7 shows that the abnormality occurrence rate of the hot water supply apparatus 100 can be suppressed by ensuring the control followability of the functional components determined by the pressure reducing valve 23 and the current value.

  In the above description, it has been described that the upper limit side rotational speed is lower than the maximum rotational speed of the compressor, but the lower limit side rotational speed can ensure a predetermined boiling temperature and heating capacity during hot water storage operation. For example, the rotational speed may be set to 35% or more of the maximum rotational speed.

As described above, with respect to the maximum number of rotations of the compressor, the use range of the compressor 21 is set to 35 to 95%, thereby ensuring a predetermined boiling temperature and heating capacity at the lower limit side rotation speed, At the upper limit side rotational speed, it is possible to provide an operation margin for the functional components of the hot water supply apparatus 100 and improve the control followability. Therefore, it is possible to improve the reliability of the hot water supply apparatus 100 and reduce market complaints without causing the problem of running out of hot water for the user and the abnormal stop of the hot water supply apparatus 100 due to boiling temperature fluctuation.

  Moreover, the noise level of the hot water supply apparatus 100 can be reduced and the incidence rate of noise complaints can be reduced by reducing the compressor rotational speed.

(Third embodiment)
A third embodiment of the present invention is shown in FIG. The third embodiment is characterized in that the configuration of the hot water supply device 100 is the same as that of the first embodiment, and the compressor rotational speed is set according to the amount of stored hot water in the hot water storage tank 10.

  That is, as shown in FIG. 8, when the amount of stored hot water is larger when hot water is supplied to the user (X1 → X2 → X3), the compressor rotational speed is changed to a lower side. The number is changed to the higher side to operate.

  That is, when there is a sufficient amount of stored hot water, the heating capacity of the heat pump unit 20 is set low by lowering the compressor speed, and the ratio of the amount of heat used from the hot water storage tank 10 is increased to discharge the hot water. Conversely, when the amount of stored hot water is small, the heating capacity of the heat pump unit 20 is set high by increasing the number of revolutions of the compressor, and the ratio of the amount of heat used from the hot water storage tank 10 is reduced to discharge hot water.

  In the determination of the compressor speed, the compressor speed determined by FIG. 8 is corrected according to the outside air temperature (or hot water temperature, refrigerant temperature) as in the first embodiment (the outside air temperature is The higher the value, the lower the value in FIG.

  The amount of hot water stored in the hot water storage tank 10 is ensured in the midnight time zone when the electricity rate is low, and the running cost is advantageous when the user uses this amount of stored hot water. Therefore, this hot water storage heat amount is preferentially used, the running cost is reduced, and by using it together with the direct hot water supply operation of the heat pump unit 20, the problem of running out of hot water for the user can be solved.

(Fourth embodiment)
In the fourth embodiment, as compared with the first embodiment, the controller 40 has a timer function for measuring the elapsed time of one day as a configuration of the hot water supply apparatus 100 and according to the usage frequency of hot water in the day. The compressor rotation speed is set.

  That is, in a time zone in which the hot water usage frequency of the user is high so that direct hot water supply operation is required, the control device 40 increases the compressor rotational speed to a predetermined upper limit rotational speed lower than the maximum rotational speed. Thus, the heating capacity of the heat pump unit 20 is increased to a predetermined heating capacity that enables direct hot water supply operation. On the contrary, in the time zone when the hot water usage frequency is low, the control device 40 reduces the compressor rotational speed to a predetermined lower limit rotational speed in order to perform hot water storage operation.

  The hot water usage frequency is set in advance, for example, from 7 o'clock in the morning to 11 o'clock, and the low hot water usage time is from 11:00 in the evening to 7 o'clock in the morning. The controller 40 controls the compressor speed by making it possible to determine which of the two time zones is the current time by using a timer.

  Thereby, in a time zone in which hot water is frequently used where direct hot water supply operation is required, it is possible to prevent the user from running out of hot water by increasing the number of rotations of the compressor. Moreover, in the time zone when the hot water usage frequency is low, the hot water storage operation can be performed at a low power charge by reducing the compressor rotation speed, and the running cost can be reduced.

  Further, regarding the noise of the compressor 21, since the background noise in the daytime during the direct hot water supply operation is high, the occurrence of complaints is small even if the compressor rotational speed is increased. On the contrary, since the background noise is low at night during the hot water storage operation, the noise level of the hot water supply apparatus 100 can be reduced by reducing the compressor rotation speed, and the problem of complaints can be reduced.

  In the above description, a method of using a timer for a predetermined schedule has been described in order to discriminate both time zones. However, a learning function is provided in the control device 40 so that a user's hot water usage frequency is calculated daily. You may make it use what was done. Furthermore, both time zones may be determined according to a signal (high frequency or low frequency) input from the operation panel 43 by the user.

(Fifth embodiment)
In the fifth embodiment, the configuration of the hot water supply device 100 is the same as that of the first embodiment, and the compressor rotational speed is set according to the boiling set temperature set during the direct hot water supply operation or the hot water storage operation. Has a characteristic.

  That is, during the direct hot water supply operation, when the boiling set temperature is low (for example, 43 ° C.), the compressor rotational speed is increased (set to a predetermined upper limit rotational speed lower than the maximum rotational speed), and the heat pump unit 20 The heating capacity is increased to prevent the user from running out of hot water corresponding to the large hot water flow rate.

  Also, during hot water storage operation, if the boiling temperature is set high (for example, 90 ° C.) to ensure the amount of stored hot water, it takes 8 hours from 11:00 in the evening to 7:00 in the morning. ) Since boiling is performed, the compressor rotational speed is reduced, the heating capacity of the heat pump unit 20 is reduced, the power used is reduced, and high-efficiency operation is possible.

(Sixth embodiment)
In the sixth embodiment, the configuration of the hot water supply device 100 is the same as that of the first embodiment, and according to the amount of stored hot water in the hot water storage tank 10, whether the compressor 21 is stopped or continued after hot water is sorted. Has a characteristic.

  That is, if the amount of stored hot water (the amount of remaining hot water) in the hot water storage tank 10 becomes less than the minimum amount of stored hot water (predetermined heat) after the end of the direct hot water supply operation, the control device 40 does not stop the heat pump unit 20 (compressor 21). The hot water is stored in the hot water storage tank 10 by switching to hot water storage operation. Then, when the hot water storage amount secures the necessary hot water storage amount, the heat pump unit 20 (compressor 21) is stopped.

  Thereby, by always maintaining the required hot water storage heat amount, the hot water discharge of the heat pump unit 20 at the start of the direct hot water supply operation and the lack of heating due to the frosting of the evaporator 24 can be compensated with hot water in the hot water storage tank 10, User convenience can be improved.

It is a schematic diagram which shows schematic structure of a heat pump type hot water supply apparatus. It is a control characteristic figure which shows the relationship of the compressor rotation speed with respect to the outside temperature in 1st Embodiment. It is a graph which shows the pressure-reduction valve opening degree, pump output, inverter electric current, and heating capability with respect to the compressor rotation speed in 2nd Embodiment. It is a time chart which shows the relationship between the boiling temperature and pump capability in 2nd Embodiment (no abnormal stop). It is a time chart which shows the relationship between the boiling temperature and pump capability in a prior art (with abnormal stop). It is a graph which shows the compressor output and overshoot temperature with respect to the pump output in 2nd Embodiment. It is a graph which shows the abnormality occurrence rate with respect to the compressor output in 2nd Embodiment. It is a control characteristic figure which shows the relationship of the compressor rotation speed with respect to the amount of hot water storage in 3rd Embodiment.

Explanation of symbols

10 Hot water storage tank 13 Mixing valve (mixing means)
20 Heat pump unit (heat pump device)
21 Compressor 22 Radiator 23 Pressure reducing valve, variable pressure reducing valve 24 Evaporator 27 Water supply pump (flow rate adjusting means)
31 Boiling temperature thermistor (temperature detection means)
32 Outside temperature thermistor (temperature detection means)
33 Water supply thermistor (temperature detection means)
35a to 35c Hot water storage thermistor (heat quantity detection means)
37 Flow rate counter (hot water state detection means)
40 Control device (control means)
100 Heat pump hot water supply system

Claims (15)

  1. A hot water storage tank (10) for storing hot water for hot water supply inside,
    A heat pump device (20) in which a compressor (21), a radiator (22), a pressure reducing valve (23), and an evaporator (24) are sequentially connected, and a refrigerant is circulated by the compressor (21);
    Control means (40) for controlling the operation of the compressor (21),
    A hot water supply operation is performed in which hot water is heated by heat radiation from the radiator (22) and the heated hot water is directly supplied to a hot water supply terminal , and a hot water storage operation is performed in which the heated hot water is stored in the hot water storage tank (10). In heat pump hot water supply equipment,
    The control means (40) includes the compressor (21) between a lower limit side rotational speed that secures a predetermined heating capacity as the heat pump device (20) and an upper limit side rotational speed that is a predetermined amount lower than the maximum rotational speed. ) actuates a
    The heat pump type hot water supply device, wherein the compressor (21) is operated by changing the rotational speed of the compressor (21) to a lower side as the amount of stored hot water in the hot water storage tank (10) is larger .
  2.   The control means (40) changes the rotational speed of the compressor (21) to a lower side as the outside air temperature, the hot water temperature, or the temperature of the refrigerant in the evaporator (24) is higher, The heat pump type hot water supply apparatus according to claim 1, wherein the compressor (21) is operated.
  3.   The heat pump type hot water supply apparatus according to claim 2, further comprising temperature detection means (32, 33) for detecting either the outside air temperature, the temperature of the hot water supply, or the temperature of the refrigerant.
  4.   The said control means (40) increases the rotation speed of the said compressor (21), when performing the defrost operation which removes the frost which generate | occur | produces in the said evaporator (24) in winter. The heat pump type hot water supply apparatus according to claim 2 or claim 3.
  5.   The control means (40) increases the rotational speed of the compressor (21) to the upper limit side rotational speed in a time zone in which the hot water usage frequency is high in a daily time zone, 2. The compressor (21) is operated by lowering the rotational speed of the compressor (21) to the lower limit side rotational speed in a time slot in which the hot water usage frequency is low in the time slot. The heat pump type hot water supply apparatus described in 1.
  6. A time zone in which the hot water usage frequency is high and a time zone in which the hot water usage frequency is low are determined in advance,
    Have a timer to keep track of the time of the day,
    The heat pump type hot water supply apparatus according to claim 5 , wherein the control means (40) discriminates a time zone in which the hot water usage frequency is high and a time zone in which the hot water usage frequency is low by the timer. .
  7. A hot water storage tank (10) for storing hot water for hot water supply inside ,
    A heat pump device (20) in which a compressor (21), a radiator (22), a pressure reducing valve (23), and an evaporator (24) are sequentially connected, and a refrigerant is circulated by the compressor (21);
    Control means (40) for controlling the operation of the compressor (21),
    A hot water supply operation is performed in which hot water is heated by heat radiation of the radiator (22) and the heated hot water is directly supplied to a hot water supply terminal, and a hot water storage operation is performed in which the heated hot water is stored in the hot water storage tank (10). In heat pump hot water supply equipment,
    The control means (40) includes the compressor (21) between a lower limit side rotational speed that secures a predetermined heating capacity as the heat pump device (20) and an upper limit side rotational speed that is a predetermined amount lower than the maximum rotational speed. )
    When the hot water boiling set temperature set by the user is low, the rotational speed of the compressor (21) is increased to the upper limit side rotational speed, and when the boiling hot set temperature is high, A heat pump type hot water supply apparatus for operating the compressor (21) by reducing the rotational speed of the compressor (21) to the lower limit side rotational speed.
  8. Controlled by the control means (40), hot water heated by the radiator (22) and hot water stored in the hot water storage tank (10) are mixed in a predetermined ratio, and the mixed hot water is mixed. The heat pump type hot water supply apparatus according to any one of claims 1, 5, 6, and 7 , further comprising a mixing means (13) for discharging hot water to the hot water supply terminal.
  9. Having calorific value detection means (35a-35c) for detecting the quantity of hot water stored in the hot water storage tank (10);
    The heat pump type according to claim 8 , wherein the control means (40) controls the mixing means (13) according to the amount of stored hot water detected by the heat quantity detection means (35a to 35c). Hot water supply device.
  10. When the hot water storage heat amount detected by the heat amount detection means (35a to 35c) is smaller than a predetermined heat amount, the control means (40) can stop the hot water supply to the hot water supply terminal even after stopping the hot water supply. The heat pump hot water supply apparatus according to claim 9 , wherein the hot water storage operation is performed by continuously operating 21).
  11. Having a hot water state detection means (37) for detecting the hot water discharged from the hot water supply terminal;
    Wherein said control means (40), the tapping state detecting means (37) the detection result by the If it is determined that the tapping state, of claims 1 to 10, characterized in that actuating the compressor (21) The heat pump type hot water supply apparatus according to any one of the above.
  12. The pressure reducing valve (23) is according to any one of claims 1 to 11, characterized in that the valve opening degree by the control means (40) has a variable pressure reducing valve (40) controlled Heat pump water heater.
  13. Temperature detecting means (31) for detecting the boiling temperature of the hot water heated by the radiator (22);
    The flow rate adjusting means (27) for adjusting the flow rate of the hot water supplied to the radiator (22) while being controlled by the control means (40). The heat pump hot water supply device according to any one of 12 .
  14. The heat pump hot water supply device according to any one of claims 1 to 13 , wherein the compressor (21) compresses the refrigerant to a critical pressure or more and discharges the refrigerant.
  15. The heat pump hot water supply apparatus according to claim 14 , wherein the refrigerant is carbon dioxide.
JP2006015624A 2006-01-24 2006-01-24 Heat pump type water heater Expired - Fee Related JP4453662B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006015624A JP4453662B2 (en) 2006-01-24 2006-01-24 Heat pump type water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006015624A JP4453662B2 (en) 2006-01-24 2006-01-24 Heat pump type water heater

Publications (2)

Publication Number Publication Date
JP2007198632A JP2007198632A (en) 2007-08-09
JP4453662B2 true JP4453662B2 (en) 2010-04-21

Family

ID=38453404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006015624A Expired - Fee Related JP4453662B2 (en) 2006-01-24 2006-01-24 Heat pump type water heater

Country Status (1)

Country Link
JP (1) JP4453662B2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009168348A (en) * 2008-01-16 2009-07-30 Toyota Motor Corp Cogeneration apparatus and its control method
DE602008006519D1 (en) * 2008-03-20 2011-06-09 Daikin Europe Nv Space heating and method for controlling the space heating
JP2009287794A (en) * 2008-05-27 2009-12-10 Mitsubishi Electric Corp Heat pump type water heater
JP2010025494A (en) * 2008-07-23 2010-02-04 Sanden Corp Heat pump type hot water supply device
JP2010025493A (en) * 2008-07-23 2010-02-04 Sanden Corp Heat pump type hot water supply device
JP5161008B2 (en) * 2008-09-05 2013-03-13 株式会社コロナ Heat pump type water heater
JP5188378B2 (en) * 2008-12-16 2013-04-24 三菱電機株式会社 Heat pump water heater
JP5159719B2 (en) * 2009-07-16 2013-03-13 三菱電機株式会社 Heat pump water heater
JP4975067B2 (en) * 2009-07-16 2012-07-11 三菱電機株式会社 Heat pump water heater
JP5159857B2 (en) * 2010-10-01 2013-03-13 三菱電機株式会社 Heat pump water heater
JP5938260B2 (en) * 2012-04-20 2016-06-22 リンナイ株式会社 Heat pump water heater
JP5880266B2 (en) * 2012-05-09 2016-03-08 三浦工業株式会社 Water heating system
JP6091614B2 (en) * 2013-06-20 2017-03-08 三菱電機株式会社 Heat pump equipment
JP6167299B2 (en) * 2013-09-26 2017-07-26 パナソニックIpマネジメント株式会社 Heat Pump Water Heater
JP6134910B2 (en) * 2013-09-26 2017-05-31 パナソニックIpマネジメント株式会社 Heat pump water heater
JP2015155781A (en) * 2014-02-21 2015-08-27 パナソニックIpマネジメント株式会社 heat pump water heater

Also Published As

Publication number Publication date
JP2007198632A (en) 2007-08-09

Similar Documents

Publication Publication Date Title
CA2751100C (en) Residential heat pump water heater
US7021073B2 (en) Heat pump hot water supply system of hot water storage type
EP1707887B1 (en) Heat-pump hot water supply apparatus
JP3918807B2 (en) Hot water storage type electric water heater
JP5310431B2 (en) Heat pump type hot water heater
KR100546536B1 (en) Hot Water Supply Apparatus
US7856835B2 (en) Hot water supply apparatus
JP4324154B2 (en) Hot water storage water heater
WO2010122759A1 (en) Hot water storage-type hot water supply device, hot water supply and heating device, operation control device, operation control method, and program
JP3855902B2 (en) Heat pump water heater
JP4605008B2 (en) Hot water supply device and control device for hot water supply device
EP2216609A1 (en) Hot water supply system
JP4485406B2 (en) Hot water storage water heater
JP2007132553A (en) Hot water storage type water heater
JP3864768B2 (en) Heat pump type water heater
JP3737381B2 (en) Water heater
JP2003279133A (en) Heat pump water heater
JP3855985B2 (en) Heat pump water heater
JP3737414B2 (en) Water heater
JP4389378B2 (en) Hot water storage type heat pump water heater
JP2004347148A (en) Heat pump hot water supply device
DE102004018034B4 (en) Method for switching on a heat pump in connection with a hot water storage tank for heat pumps
JP2003139405A (en) Storage-type hot water supply system
JP4688586B2 (en) Hot water storage type heat pump water heater
WO2009087811A1 (en) Heat-pump hot-water supply apparatus

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080221

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090702

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090721

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090902

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091020

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091209

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100112

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100125

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130212

Year of fee payment: 3

R151 Written notification of patent or utility model registration

Ref document number: 4453662

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130212

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140212

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S802 Written request for registration of partial abandonment of right

Free format text: JAPANESE INTERMEDIATE CODE: R311802

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees