KR100746894B1 - Heat pump hot water supply machine - Google Patents

Abstract

According to the present invention, in a hot water pump cycled hot water supply device in which a water refrigerant heat exchanger consisting of a refrigerant side heat exchanger tube and a water supply side heat exchanger tube is wound at an equal pitch, the temperature sensor attached to the surface of the hot water tank is obstructed by the water refrigerant heat exchanger. In other words, the service check was difficult.

The refrigerant-side heat exchanger tube constituting the water-cooled heat exchanger of the heat pump cycle and the water-side heat transfer tube are thermally contacted and wound in a spiral shape on the outer periphery of the cylindrical water storage tank, and hot water heated by the water refrigerant heat exchanger is stored in the water storage tank, Further, in a heat pump hot water supply device configured to detect a stored amount of hot water by a temperature sensor attached to a surface of a water storage tank, the distance from the water storage tank to the refrigerant-side heat pipe and the water supply-side heat pipe wound in the spiral shape is partially extended outward. The winding deformation | transformation part used is provided, and the temperature sensor can be attached from the exterior to the storage tank surface using this winding deformation | transformation part.

Heat pump refrigerant circuit, hot water circuit, water refrigerant heat exchanger, in-flight purifying pump, pressure reducing device

Description

Heat Pump Hot Water Supply Unit {HEAT PUMP HOT WATER SUPPLY MACHINE}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing one embodiment of a schematic configuration of a heat pump refrigerant circuit, a hot water supply circuit, an operation control means, and a component in the heat pump hot water supply apparatus of the present invention.

Fig. 2 is a flow chart showing a confirmation operation during mounting and piping connection in a heat pump hot water supply device according to an embodiment of the present invention.

Fig. 3 is a flowchart showing the operation during the boiling water operation in the heat pump hot water supply apparatus according to the embodiment of the present invention.

Figure 4 is a flow chart showing the operation when using hot and cold water in the heat pump hot water supply apparatus according to an embodiment of the present invention.

Fig. 5 is a flowchart showing an operation when the bath water is contained in automatic bath water operation.

Fig. 6 is a flowchart showing the operation during bath water warming in automatic bath water operation.

Fig. 7 is a diagram showing an example of the relationship between the temperature difference between the heating side fluid and the bath water of the bath water heat exchanger, and the heating efficiency.

Fig. 8 is a diagram showing the passage of bath water additional heating time, the temperature change of the bath water and the temperature set value of the heating side fluid when the remaining hot water of the bath is cooled slightly.

Fig. 9 is a diagram showing the lapse of bath water addition heating time, the temperature change of the bath water, and the temperature setting value of the heating fluid when the remaining hot water of the bath is considerably cooled as in the next heating operation.

Fig. 10 is a schematic diagram of a schematic configuration of a heat pump refrigerant circuit, a hot water supply circuit, operation control means and components in a heat pump hot water supply apparatus according to another embodiment of the present invention.

11 is a front view of the heat pump hot water supply device according to the present embodiment, and a front plate is removed.

Figure 12 is a side view of Figure 11;

Figure 13 is a top view of Figure 11;

14 is an enlarged view of a portion A of FIG. 13;

FIG. 15 is an enlarged front view of the water refrigerant heat exchanger pipe and the water supply side heat exchanger pipe used in FIG. 12; FIG.

FIG. 16 is an explanatory view of a deformation part shown in FIG. 15; FIG.

FIG. 17 is a view for explaining an embodiment different from that in FIG.

<Explanation of symbols for the main parts of the drawings>

1a, 1b: compressor

1c, 1d: pressure sensor

2: water refrigerant heat exchanger

2a, 2b: refrigerant heat transfer tube

2c, 2d: water supply side heat pipe

2e: heat exchange sensor

3a, 3b: decompression device

4a, 4b: evaporator

5: water supply member

6: pressure reducing valve

7: water supply water sensor

7a: water supply thermistor

8: water storage tank

8a to 8d: tank thermistor

9: inflight circulation pump

10: water supply check valve

11: water heat exchanger quantity sensor

12: hot water mixing valve

13: hot and cold water mixing valve

14: flow control valve

14a: hot water thermistor

15: kitchen tapping member

16: kitchen faucet

17: bath water pouring valve

18: flow switch

18a: bath water thermistor

19: bath water circulation pump

20: tapping member

21: bath water circulation adapter

22: bathtub

22a: water level sensor

23: heat exchanger for bath water

23b, 23d: bath water heat pipe

24: bath water tapping member

25: hot and cold water on-off valve

26: bath water faucet

27: escape valve

28: refrigerant shut off valve

30: heat pump refrigerant circuit

31: hot water supply unit

31a: box cabinet

32: compressor chamber

33: evaporator chamber

34: fan

35: electrical box

36: storage tank room

37: partition plate

38: base

39: partition plate

40: hot water circuit

41: second electrical box

42: legs

43: attachment leg

44: insulation

44b: heat insulation cover

45: cutout window

46: deformation part

47: spacing pipe

48: heat exchange pipe

49: dew gutter

50: driving control means

[Document 1] Japanese Patent Laid-Open No. 2002-106963

[Document 2] Japanese Patent Publication No. 2003-336894

The present invention relates to a heat pump hot water supply device.

The conventional heat pump hot water supply device installs a large-capacity storage tank, similar to an electric water heater, and stores the hot water at a low temperature tank by boiling water with a heat pump circuit at night using cheap discount power at night. The storage system used was common.

However, in the above water storage system, there are only a water storage circuit for storing hot water in the water storage tank and a hot water supply circuit for supplying hot water from the water storage tank to the use terminal.

For this reason, in the use of bath water, when a plurality of people bathe after bathing in the bathtub, additional heating is required due to the decrease in hot water temperature, but since only one-sided hot water replenishing function from the water storage tank is available, proper response could not be achieved.

As the above-mentioned improvement measures, there has been recently added a bath water additional heating function to the conventional water bath system. Such a heat pump hot water supply device is disclosed in Japanese Patent Application Laid-Open No. 2002-106963 (Patent Document 1), which heat-exchanges hot water in a bathtub (bath tub) with a high-temperature refrigerant, and adds a heat exchanger tube for a refrigerant, a heat transfer tube for a hot water bath, and a bath water. The heat transfer tube for heating was installed in an integral water refrigerant heat exchanger (heat radiator), and the hot water of the bathtub was heated at the refrigerant temperature to boil the water in the boiling water tank to perform bath water additional heating operation.

In addition, Japanese Patent Application Laid-Open No. 2003-336894 (Patent Document 2) discloses a method of heat-exchanging hot water of a bathtub with hot water, and installs a bath water heat exchanger separately from the low-temperature heat exchanger. In the heat exchanger, the bath water was further heated by heat-exchanging the hot water at a constant temperature and the remaining hot water of the bath.

Moreover, the water refrigerant heat exchanger which consists of the said heat exchanger tube for refrigerant | coolants and the heat transfer tube for water storage is wound around the outer periphery of a water storage tank.

In addition, a plurality of temperature sensors are attached to the surface of the water storage tank, and the heat pump operation is performed by detecting the presence or absence of the amount of hot water in the water storage tank, the temperature of the hot water amount, and the like.

However, after the water refrigerant heat exchanger is attached to the water storage tank, the desorption of the temperature sensor is prevented by the heat transfer tube of the water refrigerant heat exchanger comprising the refrigerant heat transfer tube and the water heater heat transfer tube. There was a problem such that it was not possible to detach.

[Patent Document 1] Japanese Patent Laid-Open No. 2002-106963

[Patent Document 2] Japanese Patent Publication No. 2003-336894

In the conventional heat pump hot water supply device, the idea of "driving at night with low electric charge and storing as much as possible in the water storage tank" has been infiltrated, and heating efficiency due to the heating temperature difference in bath water addition heating operation ( Heating capacity ÷ power consumption and also referred to as COP) have not been examined very much.

Therefore, in the bath water addition heating operation, it is natural to heat to the bottom temperature of the bottom tank, and in any conventional example, the heating-side fluid is subjected to heat exchange in a constant high temperature state corresponding to the bottom temperature, and further heating during bathing. When operation is performed, hot water of high temperature close to the boiling water temperature exceeding the proper temperature may be returned, and even from the viewpoint of the heating efficiency, it is not optimal control.

Moreover, in the heat pump hot water supply apparatus which winds up a water refrigerant heat exchanger in the outer periphery of a water storage tank, in order to accurately grasp the temperature of the hot water stored in a water storage tank, it is important to attach a some temperature sensor and to manage it. In order to continuously manage a temperature sensor, it is required to make this temperature sensor into the attachment structure which is easy to maintain all the time, but there was no suggestion about this in the well-known example mentioned above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a heat pump hot water supply apparatus which can eliminate the return of the hot water during the bath water addition heating operation and significantly improve the heating efficiency of the heat pump operation as compared with the conventional one. It is intended to be.

In addition, another object of the present invention is to provide a heat pump hot water supply device capable of operating the hot water supply device with good efficiency by always managing the hot water temperature in the water storage tank.

MEANS TO SOLVE THE PROBLEM In order to solve the subject in the bath water addition heating operation | movement of the said heat pump hot water supply apparatus of the said prior art, heat pump operation | movement loosens the refrigerant throttle amount of a decompression device, and makes it low speed rotation, and when heating temperature is low, operation efficiency It is noted that even when the heating side temperature is lowered in the heat exchanger, the heat release to the surroundings is reduced. Therefore, the temperature of the heating side fluid of the heat exchanger for bath water is lower than the boiling temperature, regardless of the conventional boiling temperature. It is to solve the recovery and to improve the heating efficiency. In addition, it is to ensure that the hot water temperature in the water storage tank is always accurately identified.

That is, a heat pump refrigerant circuit in which a compressor, a water refrigerant heat exchanger for exchanging water and a refrigerant, a decompression device, and an evaporator for exchanging air and a refrigerant are sequentially connected through a refrigerant pipe, the water refrigerant heat exchanger, and a water refrigerant. A hot water circuit consisting of a water storage tank for storing hot water heated by a heat exchanger, an in-flight circulation pump for circulating hot water in the cabin, a cold / hot water mixing valve, a flow control valve, and a water pipe connecting these parts, and the hot water and heating side of the bathtub A bath water additional heating circuit comprising a bath heat exchanger for exchanging fluid, a bath water circulation pump for circulating hot water in the bath, a flow switch, and a water pipe connecting these parts, the compressor, a decompression device, an in-flight circulation pump, Operation to control the operation of cold and hot water mixing valve, flow control valve, and bath water circulation pump The bath water addition heating operation circulates the cold and hot water of the bath water in the cabin and performs the heat pump operation, and the heating side fluid temperature in the bath water heat exchanger is lower than the tank bottom temperature and circulated from inside the bathtub. The temperature is higher than the temperature of the remaining hot water. In addition, since the heat pump operation is performed during the bath water addition heating operation and hot water of the boiling water tank is not used, there is no fear of hot water running off in the hot water supply immediately after the bath water addition heating operation.

According to the above-described configuration, while the heat pump operation in the conventional bath water addition heating operation was the boiling temperature of the boiling water tank, the heat pump operation of the present invention operates at a temperature lower than the boiling water temperature, so that the hot water return in the bathtub is returned. The problem of the above can be solved and the heating efficiency can be improved.

In addition, the water-cooled heat exchanger of the heat pump cycle is installed by the thermal contact between the refrigerant-side heat exchanger tube and the water supply-side heat exchanger tube, and arranged in a spiral form on the outer periphery of the cylindrical water storage tank, the hot water heated by the water refrigerant heat exchanger In a heat pump hot water supply device in which a hot water is stored in a tank and the amount of stored hot water is detected by a temperature sensor attached to the surface of the hot water tank, the distance from the hot water tank to the coolant-side heat exchanger tube and the water supply-side heat exchanger of the spiral shape is partially. Since the winding deformation | transformation part extended to the outer side is provided, and the space which can attach a temperature sensor from the outside is provided to the storage tank surface using this winding deformation | transformation part, for example, the temperature of the center of the storage tank in which both pipes are wound Can be measured accurately. Moreover, also in replacing the said temperature sensor by a service etc., this can be performed easily.

In addition, since a cutout window is made in the heat insulating material of the part corresponding to the winding deformation | transformation part of a refrigerant | coolant side heat exchanger tube and a water supply side heat exchanger tube, and a temperature sensor is attached to the water storage tank surface facing from the cutout window, the heat insulating material which covers the water storage tank surface is Even if it interposes, it can pass through the heat insulating material, and can measure the surface temperature of a boiling water tank.

The gap between the deformable portion made by partially enlarging the refrigerant-side heat transfer tube and the water supply-side heat transfer tube wound in an equal pitch in a spiral shape is larger than the temperature sensor that can easily attach and detach the temperature sensor attached to the water storage tank surface. Therefore, during assembly or service, the operator can easily attach or detach the temperature sensor with his or her own hand using the gap caused by the previous pitch expansion and pipe deformation.

In addition, since the position of the deformable portion formed by partially expanding the refrigerant-side heat transfer tube and the water supply-side heat transfer tube that are in thermal contact with each other is opposite to the corner portion of the rectangular cabinet constituting the outline of the hot water supply device body, The deformable portion can be stored without expanding.

In addition, both pipes wound on the vertical type storage tanks are interposed between the thermally maintained pipes that maintain the enlarged dimension between the winding pitch enlarged portions of the water-cooled heat exchanger consisting of the refrigerant-side heat pipe and the water-side heat pipe. Since the enlarged portion is not reduced by the weight, the deformed portion is always kept in a constant shape, and the detachment of the temperature sensor through the deformed portion can be easily performed.

In the case of attaching a plurality of temperature sensors to the vertically arranged storage tanks, the upper and lower temperature sensors are used at portions where the refrigerant-side heat transfer pipe and the water supply-side heat transfer pipe pipe are not wound, and the intermediate temperature sensor is wound on both pipes. Since the pitch is enlarged and the pipe is partially attached to the enlarged deformation portion, the hot water amount (heat value) of the storage tank can be accurately measured, and a predetermined amount of temperature is always kept in the storage tank by automatic operation or the like. Quantity can be secured.

Moreover, since the refrigerant | coolant side heat exchanger tube and the water supply side heat exchanger tube of two sets of heat pump cycles are arrange | positioned so that heat exchange is possible, and it has the shape wound up through the heat insulating material on the outer periphery of a water storage tank, it can aim at miniaturization of a water storage tank. Of course, it is possible to raise the water supply side heat transfer pipe pipe temperature to a predetermined temperature in a short time.

Further, the water refrigerant heat exchanger wound in the water storage tank is constituted by the first and second water refrigerant heat exchangers in advance, and the connection portion of the first and second water refrigerant heat exchangers is a winding deformation portion in which the distance from the water storage tank is partially enlarged. Since the connection pipe is used for the connection between the water-cooling heat exchanger pipes, the pipe diameter is different from the front and rear pipe diameters. It is the same pitch and can be wound up by the same diameter.

In addition, since welding can be performed easily because it is spaced apart from a tank, it is completed without using a long pipe. This improves productivity.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

[First Embodiment]

An embodiment of the present invention will be described with reference to FIG.

The heat pump hot water supply device includes a heat pump refrigerant circuit 30, a hot water supply circuit 40, and operation control means 50.

The heat pump refrigerant circuit 30 is a two cycle system having two components each, and the refrigerant-side heat transfer tubes 2a and 2b disposed in the compressors 1a and 1b, the water refrigerant heat exchanger 2, and the pressure reducing device 3a, 3b) and the evaporator 4a, 4b are respectively connected in order through the refrigerant pipe, and the refrigerant | coolant is enclosed in it.

The compressors 1a and 1b are capable of volume control, and operate at a large capacity when a large amount of hot water is supplied. Here, the compressors 1a and 1b rotate from low speed (e.g. 700 revolutions per minute) to high speed (e.g. 7000 revolutions per minute) by PWM control, voltage control (e.g. PAM control and combination control thereof). It is supposed to be controlled.

The water refrigerant heat exchanger (2) is provided with refrigerant side heat transfer tubes (2a, 2b) and water supply side heat transfer tubes (2c, 2d), and exchanges heat between the refrigerant side heat transfer tubes (2a, 2b) and water supply side heat transfer tubes (2c, 2d). It is configured to perform.

Generally, expansion valves or the like are used as the pressure reducing devices 3a and 3b to depressurize the medium-temperature high-pressure refrigerant conveyed through the water refrigerant exchanger 2 to the evaporators 4a and 4b as low pressure refrigerants that are easy to evaporate. Transfer. In addition, the pressure reducing devices 3a and 3b change the amount of throttling of the refrigerant passage to adjust the amount of refrigerant circulating in the heat pump circuit, or transfer the middle temperature refrigerant to the evaporators 4a and 4b in large quantities with the throttle amount being fully open. It also serves as a defrosting device to melt frost.

In addition, the evaporator 4a, 4b is comprised with the air refrigerant heat exchanger which heat-exchanges air and a refrigerant | coolant.

The hot water supply circuit 40 is provided with a water circulation circuit for performing hot water supply, direct hot water supply, tank hot water supply, tank additional heating, bath water holding, and bath water additional heating.

In the bottom water circuit, the bottom water tank (8), the in-flight circulation pump (9), the water heat exchange water quantity sensor (11), the water supply side heat transfer pipes (2c, 2d), the hot water mixing valve (12), and the bottom water tank (8) pass through the water pipe. It is connected in order and is comprised.

The direct hot water supply circuit includes a water supply member (5), a pressure reducing valve (6), a water supply water sensor (7), a water supply check valve (10), a water heat exchanger water sensor (11), a water supply side heat transfer pipe (2c, 2d), a hot water supply mixing valve 12, the cold / hot water mixing valve 13, the flow regulating valve 14, and the kitchen tapping member 15 are sequentially connected through a water pipe.

In addition, the water supply member 5 is connected to a water supply source such as tap water, and the kitchen tapping member 15 is connected to the kitchen tap 16 or the like.

The tank hot water supply circuit includes a water supply member 5, a pressure reducing valve 6, a water supply water sensor 7, a water storage tank 8, a hot water mixing valve 12, a cold / hot water mixing valve 13, a flow rate adjusting valve 14, The kitchen tapping-out member 15 is connected in order through the water piping, and is comprised.

The tank additional heating circuit includes a water storage tank (8), an in-flight circulation pump (9), a water heat exchange water quantity sensor (11), a water supply side heat transfer pipe (2c, 2d), a hot water mixing valve (12), and a water storage tank (8). It is connected and configured in order through.

The bath water holding circuit includes a water supply member (5), a pressure reducing valve (6), a water supply flow rate sensor (7), a water supply check valve (10), a water heat exchanger flow rate sensor (11), a water supply side heat transfer pipe (2c, 2d), a hot water supply mixing valve (12), hot and cold water mixing valve (13), flow control valve (14), bath water pouring valve (17), flow switch (18), bath water circulation pump (19), hot and cold water member (20), bath water The circulation adapter 21 and the bathtub 22 are connected in order through the water piping, and are comprised. In addition, the hot-water tapping member 20 is connected to the bath 22 and the shower (not shown) so that the hot water can be heated together with the bath 22.

In addition, when the bath water is contained, the tank water supply from the water storage tank 8 to the bath 22 is also performed in a range in which the hot water in the water storage tank 8 is not below the minimum required amount together with the direct water supply by the bath water adding circuit. .

The bath water additional heating circuit includes a bath 22, a bath water circulation adapter 21, a hot and cold water member 20, a bath water circulation pump 19, a flow switch 18, a bath water heat pipe 23b, a bath water hot water member 24, The bath water circulation adapter 21 and the bathtub 22 are connected in order through the water piping, and are comprised.

In addition, when the bath water is additionally heated, the heat pump operation and the in-flight pump 9 are operated together with the water circulation of the bath water by the bath water additional heating circuit, and the hot water heated by the water refrigerant heat exchanger 2 is used as a heat exchanger for bath water. By circulating through the hot water heat exchanger tube 23a provided in 23, heat is exchanged between the hot water heat exchanger tube 23a and the bath water heat exchanger tube 23b to further perform bath water heating.

Next, the operation control means 50 performs the operation and stop of the heat pump refrigerant circuit 30 and the rotation control of the compressors 1a and 1b by the operation setting of the kitchen remote control 51 and the bath water remote control 52. , Refrigerant throttling amount adjustment of the pressure reducing devices 3a and 3b, operation / stop of the in-flight circulation pump 9, bath water circulation pump 19, hot water mixing valve 12, hot and cold water mixing valve 13, flow rate adjusting valve ( 14), by controlling the bath water pouring valve 17 and the cold / hot water opening / closing valve 25 to perform a hot water operation, a direct hot water operation, a tank hot water operation, a tank additional heating operation, a bath water adding operation, and a bath water additional heating operation.

In addition, the operation control means 50 controls the rotation speed of the compressors 1a and 1b, and operates at a predetermined high speed rotation speed immediately to start the heating start time immediately after the operation is started, and the heating water addition heating operation having a relatively light heat load is performed. At the time of operation, it is controlled to operate at low speed suitable for heating temperature.

In addition, after using hot water in the water use terminal, the inside of the hot water tank has a water hot water operation function which controls so that the hot water of predetermined temperature may be filled with water by stopping operation after performing tank water hot water operation.

In addition, the heat pump hot water supply device detects the water supply temperature of the water supply thermistor 7a for detecting the water supply temperature and the heat exchange thermistor 2e for detecting the tapping temperature of the water refrigerant heat exchanger 2, and the water storage temperature of the water storage tank 8 and the amount of hot water. The tank thermistors 8a to 8d to be used, the hot water supply thermistor 14a to detect the hot water temperature, the bath water thermistor 18a to detect the temperature of the bath water, and the pressure sensors 1c and 1d to detect the discharge pressure of the compressors 1a and 1b. ), A water level sensor 22a for detecting the water level in the bathtub 22 is provided, and each detection signal is configured to be input to the driving control means 50. The driving control means 50 controls each device based on these signals.

The hot / cold water open / close valve (25) is installed between the water refrigerant heat exchanger (2) and the bath water heat exchanger (23), and closes the water circuit for the bath water from the water refrigerant heat exchanger (2) except when bath water is additionally heated. It is for preventing the leakage of heat to the heat exchanger (23).

In addition, the water supply check valve 10 flows water in only one direction to prevent backflow, and the escape valve 27 operates when the hot water pressure in the water storage tank 8 becomes a predetermined value or more. It acts as a pressure protection.

Next, the operation of the heat pump hot water supply device will be described based on the flowcharts of FIGS. 2 to 6 with reference to the heat pump circuit 30 and the hot water supply circuit 40 of FIG.

Fig. 2 is an embodiment of a flowchart showing a necessary operation at the time of mounting.

The heat pump hot water supply device is transported from the manufacturing site to be mounted at an installation site desired by the user. The water supply member 5 is supplied to a water supply source such as tap water, and the kitchen tapping member 15 is provided to the kitchen faucet 16. The member 24 is connected to the bath water faucet 26 (step 60), and then the taps 16 and 26 or the escape valve 27 are opened (step 61) for the air discharge (step 61). When the main cock is opened (step 62), in-flight water starts from the water supply source, and the water is regulated to a certain pressure by the pressure reducing valve 6, and then the water storage tank 8 and the water refrigerant heat exchanger 2 And flow into each water line (step 63). After confirming that the cabin has become full due to water overflow from the taps 16 and 26 or the escape valve 27 (step 64), the taps 16 and 26 or the escape valve 27 are closed. In-flight water supply is terminated (step 65).

In addition, each equipment at the time of mounting of a heat pump water heater is set to the following initial states. That is, the hot water mixing valve 12 and the cold / hot water mixing valve 13 are in a bidirectional state, the flow regulating valve 14 and the water open / close valve 25 are in an open state, and the bath water pouring valve 17 is in a closed state.

Next, the power switch is turned on (step 66) to perform bathing operation (step 67).

In the bathing operation, the bath water pouring valve 17 is opened and injected into the bathtub until the water overflows (step 68), and the capacity of the bathtub is automatically calculated by the water level sensor 22a or the water supply sensor 7 (step). 69) The volume of the bath is set (step 70), and the bath is used for bathing in automatic bathing water operation after setting, and for controlling the amount of hot water at the time of additional heating of bathing water. Therefore, the bath water dipping operation requires only one time at the time of setting the heat pump hot water supply device.

3 is an embodiment of a flowchart showing a boiling water operation operation of boiling water in a water storage tank.

When the instruction of the hot water operation is generated by the control of the operation control means 50 (step 71), determination of the water temperature and the hot water amount is performed by the tank thermistors 8a to 8d (step 72). If the low water is used and is reduced to less than the prescribed value, the low water operation is started (step 73).

In this bottom water operation (step 73), operation of the compressors 1a and 1b is started, and the gaseous refrigerant in the compressors 1a and 1b is compressed and heated to be a high temperature and high pressure refrigerant and transferred to the water refrigerant heat exchanger 2. . As a result, in the water refrigerant heat exchanger 2, the high temperature refrigerant flowing in the refrigerant-side heat transfer tubes 2a and 2b and the water flowing in the water supply-side heat transfer tubes 2c and 2d exchange heat to heat the refrigerant, and the water is heated. The heat-dissipated refrigerant is depressurized by the depressurizers 3a and 3b, expanded and evaporated by the evaporators 4a and 4b to form a gas, and then returned to the compressors 1a and 1b. By continuing this heat pump operation, the water passing through the water refrigerant heat exchanger 2 is heated.

In the heat pump operation, when the rotational speed of the compressors 1a and 1b is increased to increase the refrigerant throttling amount of the pressure reducing devices 3a and 3b, the heating capacity increases, but the mechanical loss or heat loss increases, resulting in lower operating efficiency. Goes. On the contrary, by lowering the rotational speed of the compressors 1a and 1b to reduce the amount of refrigerant throttling of the pressure reducing devices 3a and 3b, the heating capacity is reduced, but the mechanical loss and the heat loss are reduced, so that the operation efficiency is relatively improved. That is, in the heating operation by a heat pump, it can be said that heating with time in low temperature improves heating efficiency.

In the water storage operation step 73, the hot water mixing valve 12 is opened from the water refrigerant exchanger 2 side to the water storage tank 8 side in the water heating circuit together with the heat pump operation, and the cold / hot water mixing valve 13 side is closed. The cold / hot water open / close valve 25 is closed (step 73a). In addition, the operation of the in-flight circulation pump 9 is started, and the in-flight circulation pump 9, the water heat exchange water quantity sensor 11, the water refrigerant heat exchanger 2, and the hot water mixing valve are discharged from the water outlet of the lower portion of the water storage tank 8. (12), the water circulates to the storage tank (8). Thereby, when the hot water heated by the water refrigerant heat exchanger 2 is heated from the upper part of the water storage tank 8, and when the whole water storage tank 8 reaches the state boiled, it determines with completion of water storage (step 76). Stop (step 77).

The tapping temperature determination (step 74) for determining whether the temperature of the heated water tapping out of the water heat exchanger 2 is appropriate is performed by the heat exchange thermistor 2e, and when the tapping temperature is within the prescribed value, the tapping operation is stopped. In the state (step 75), if it is outside the prescribed value, tapping is performed by controlling the rotation speed of the compressors 1a and 1b, adjusting the throttle amount of the pressure reducing devices 3a and 3b, and controlling the rotation speed of the in-flight circulation pump 9. The temperature is adjusted (step 74a).

The determination of the bottom temperature and the amount of low temperature is performed by the tank thermistors 8a to 8d. When the whole of the tank thermistors 8a to 8d reaches a prescribed temperature, it is determined that the bottom of the tank is completed and the operation is stopped, and the tank bottom is finished (step). 77).

4 is an embodiment of a flowchart showing an operation in the case where the kitchen faucet 16 is opened and hot water is used.

When the hot and cold water is started by opening the kitchen faucet 16 (step 80), the operation control means 50 starts the compressors 1a and 1b to start the operation of the heat pump circuit 30, and at the same time, (5), pressure reducing valve (6), water feed water sensor (7), water feed check valve (10), water heat exchange water flow sensor (11), water refrigerant heat exchanger (2), hot water mixing valve (12), hot and cold water mixing valve (13) The hot water supply operation (step 81) is performed by the hot water supply circuit of the flow regulating valve 14, the kitchen tapping member 15, and the kitchen faucet 16. At the same time, the water supply member 5, the pressure reducing valve 6, the water supply water sensor 7, the water storage tank 8, the hot water mixing valve 12, the hot and cold water mixing valve 13, the flow regulating valve 14, the kitchen tapping member (15) The tank hot water supply operation (step 82) is performed by the hot water supply circuit of the kitchen faucet 16.

Here, the heat pump refrigerant circuit 30 transfers the high temperature refrigerant compressed by the compressors 1a and 1b to the refrigerant side heat transfer tubes 2a and 2b of the water refrigerant heat exchanger 2 and supplies the water supply side heat transfer tubes 2c and 2d. Water flowing from the water is heated to the hot water mixing valve 12 side, but at the start of operation, the refrigerant conveyed to the water refrigerant heat exchanger 2 does not become completely high temperature and high pressure, and thus the temperature is low, and the water refrigerant heat exchanger ( 2) Since the whole is cooled, the heating capacity for heating water is not sufficient. As time passes, the refrigerant becomes high temperature and high pressure, and accordingly, the amount of heat dissipation from the refrigerant generated increases and the heating capacity to water increases.

In addition, since it usually takes about 5 to 6 minutes until the heating capability of the heat pump operation reaches a high temperature stable state, the operation control means 50 requires that the predetermined time until the high temperature stable state immediately after the start of operation is reached. Although the start time of the water heating hot water supply operation can be shortened to about 3 to 4 minutes by controlling the operation by rotating the water at a higher speed than usual, the predetermined time (about 4 to 5 minutes) immediately after the start of operation is performed. After the tank hot water supply operation (step 82) to be supplied is performed, the operation control means 50 is operated to stop the tank hot water operation (step 84b), and is switched only to the direct hot water operation to continue the hot water operation (step 85).

In the meantime, the hot water supply thermistor 14a and the water supply water quantity sensor 7 determine the hot water temperature and the flow rate (step 83), and adjust the temperature and the flow rate (step 84a) if it is out of the specification and directly The hot water temperature determination (step 84) is further performed.

In step 84 of determining the direct hot water temperature, the temperature flow rate adjustment (step 84a) of the heat pump operation is continued when the heating temperature in the water refrigerant heat exchanger 2 is insufficient and the direct hot water temperature does not reach the prescribed temperature. In combination with the tank hot water operation (step 82). Further, the heating temperature in the water refrigerant heat exchanger 2 becomes high until the hot water supply temperature is sufficient, and when the hot water supply temperature is within the prescribed temperature, the tank hot water supply operation is stopped (step 84b) and the hot water hot water operation (step 81) Continue to (step 85).

Therefore, the role of the storage tank 8 is auxiliary at the start until the heating capacity of the heat pump operation reaches a temperature sufficient for the hot water temperature (typically 40 to 42 ° C), and the capacity of the heat pump refrigerant circuit 30, In particular, the larger the compressor output, the shorter the start time can be, and the storage tank 8 can be made smaller.

In addition, the capacity of the compressors 1a and 1b can be up to about 20 kPa, which is four times or more than the conventionally used 5 kPa, in order to cope with simultaneous use of a plurality of parts, such as bathing and hot watering the kitchen. Although it is preferable to enlarge, not only the development of a new compressor is required but each component of the heat pump refrigerant circuit 30 also requires a new examination, which is very difficult. Therefore, in the present embodiment, the two-cycle heat pump system 30a, 30b using twice as many compressors as the conventional compressor is used to secure reliability based on the utilization and performance of the prior art, and the capacity of the compressor is sufficient. The application and effects of the present invention do not change even when the 1-cycle heat pump method is used.

Next, when the tap is closed and the use of the hot and cold water is terminated (step 86), when the tank hot water operation is stopped and the direct hot water operation is stopped, the direct hot water operation is stopped, and the tank hot water operation and the direct hot water operation are used together immediately after using the hot and cold water. Next, both the hot water supply operation and the tank hot water operation are stopped (step 87).

In addition, after the operation control means 50 stops the tank hot water operation and the direct hot water operation together (step 87), the tank control operation (step 88) always starts, and the tank water temperature and the water temperature are controlled by the tank thermistors 8a to 8d. The amount of water storage is detected and it is determined that the water storage is completed (step 89). After the prescribed value is reached, the operation is stopped and the tank water storage is completed (step 90).

However, the detection of the tank storage state by the tank thermistors 8a to 8d is always performed, and when it remains more than a predetermined value in the storage tank 8 even after the water heating hot water supply operation stops for a very short time, it is determined that the water storage is completed. Tank storage operation (step 88) is performed.

As mentioned above, since the operation control means 50 has a water storage operation function which performs tank storage operation (step 88) until after completion of operation by all means after completion | finish of operation, by all means, a storage tank In (8), hot water at a predetermined temperature is always stored in a predetermined amount or more, and it is possible to eliminate the worry of the hot water temperature at the start of the operation or the hot water cut off during use.

5 is a flowchart illustrating an embodiment of an operation of adding bath water by automatic bath water operation. The bath water automatic button is turned ON (step 91), and when the set time comes, the bath water pouring operation is started (step 92), and the bath water pouring valve 17 is opened to perform bath water hot water supply (step 93). .

In the bath water hot water supply (step 93), a direct hot water operation and a tank hot water operation are used in combination with the use of the cold / hot water described in FIG. That is, for 4 to 5 minutes immediately after the start of the heat pump operation, the direct hot water supply operation and the tank hot water operation are performed in parallel, and when the direct hot water temperature reaches a stable state, the tank hot water operation is stopped and only the direct hot water operation is performed. However, in the case of a bath water hot water reserved for a timer, hot water may be supplied by the heat pump operation alone without performing tank hot water as much as possible.

During the bath water hot water operation, the bath water hot water temperature is detected by the bath water thermistor 18a, the hot water temperature is determined (step 94), and the temperature is adjusted if it is not prescribed (step 94a), and the bath water hot water is continued (step 95). ).

Further, the water level in the bathtub is detected by the water level sensor 22a to determine the amount of bath water contained (step 96).

In the bath water filling amount determination (step 96), the bath water hot water supply is continued (step 95) while out of the provisions, and when the bath water hot water supply and the heat pump operation are reached (step 97), the bath water filling operation is terminated (step 98). .

FIG. 6 is an embodiment of a flowchart showing bath water additional heating by automatic bath water operation. FIG.

Press the bath water automatic button to be turned on (step 100), and when the set time is reached, the bath water dipping operation described in FIG. 5 is started (step 101), and then the bath water dipping operation is terminated (step 102). (Step 103).

After completion of the bathing operation (step 102), the bathing water thermistor 18a detects the bathing water, and if the temperature is within the determined value in the hot water temperature determination (step 104) of the bath, the bathing water warming is continued. Operation is performed (step 105). In addition, the water level sensor 22a detects the amount of hot water in the bathtub every predetermined time (for example, 10 minutes), and keeps the bath water warm if the water content is within the prescribed value in the bath water content determination (step 106). Hot water replenishment (step 107) is performed.

Further, when the set time of automatic bathing water operation elapses, the bathing water warming operation is terminated (step 108), and the bathing water automatic operation is finished (step 109).

Next, the thermal efficiency in the bath water addition heating operation (step 105) will be described.

FIG. 7 is a diagram showing the relationship between the temperature difference between the heating fluid and the bath water of the bath water heat exchanger 23 and the heating efficiency (COP) in the heat pump hot water supply device shown in FIG. 1. The smaller the temperature difference, the higher the heating efficiency, and the highest value is when the temperature difference is about 10K.

8 is a diagram illustrating a case of bathing a plurality of times. As an example, the additional heating time elapses and the change of the heating side fluid temperature and the bathtub side circulating water temperature at the time of carrying out a bath water further heating operation to 40 degreeC of an almost suitable temperature for the bath water which went down to 30 degreeC are shown.

Line Y in Fig. 8 represents the bath-side circulating water temperature, and indicates that it is heated to 30 ° C at the start of additional heating and to 40 ° C at the end of further heating.

Line T represents the conventional heating-side fluid temperature, and the constant temperature of the storage tank is constant at about 65 ° C. Therefore, the difference between the temperature of the bath-side circulating water is 25K to 35K and the heating efficiency of FIG. It was pretty far from optimal in terms of.

Line A shows an example of the heating side fluid temperature of the present invention, and a constant value (approximately 10 K) in which the heating efficiency becomes the highest value from the start of additional heating to the end of the additional heating, with the temperature difference between the heating side fluid temperature and the bath side circulating water temperature. ), And is suitable when the heating efficiency is the highest priority regardless of the additional heating time.

Line (B) is to heat at a high temperature at the start of additional heating with a low temperature of the bath circulation water to gradually lower the temperature of the heating side fluid with the passage of additional heating and time. It is possible to perform an additional heating operation that is higher than the line T and focuses on additional heating time.

Fig. 9 is a case where bathing is carried out by adding additional bath water the next day from consideration of water saving, and as an example, the additional heating time elapses when the bath water is heated to 40 ° C., which is almost an appropriate temperature, and the heating side fluid temperature and The change in the temperature of the bath side circulation water is shown. Lines Y and T represent the bath side circulating water temperature and the conventional heating side fluid temperature, similarly to FIG.

Line (C) gradually raises the heating-side fluid temperature with the passage of the additional heating time, but increases the temperature difference at the start of the additional heating since the temperature of the bath-side circulating water at the start of additional heating is low, and emphasizes thermal efficiency. At the same time, an additional heating operation in consideration of the additional heating time can be performed.

Line (D) is to change the heating side fluid temperature stepwise in order to simplify the temperature control in the further heating operation, and it is possible to reduce fluctuation factors due to the temperature followability of the thermistor.

Line (E) is a further development of line (D) thinking, and the heating fluid temperature is set to a constant temperature lower than the boiling temperature regardless of the elapse of additional heating time. The temperature difference at the time of starting is large, and the constant heat pump operation which considered the additional heating time can be performed.

In addition, although lines A to E have been explained by dividing them into Figs. 8 and 9, the effect can be obtained regardless of the elevation of the bath-side circulation water temperature.

As described above, the additional heating operation represented by the lines A to E is characterized, each of which is assembled into the operation control means of the heat pump in the additional heating operation mode, and is in accordance with the remaining hot water temperature of the bathtub. By allowing the bath water addition heating operation mode to be selected, appropriate bath water heating operation can be performed according to the remaining hot water temperature, time zone and season.

Second Embodiment

Next, another embodiment of the present invention will be described with reference to FIG.

Fig. 10 shows an embodiment in the case where the heat capacity of the heat pump is very large and the hot water supply operation can cope with only the hot water supply without the hot water tank.

The components of the heat pump refrigerant circuit 30, the hot water supply circuit 40, and the operation control means 50 are almost the same as those of the first embodiment, and the difference is that there is no water storage tank and its related parts, and the heat exchanger for bath water. The configuration of (23) is different.

In the first embodiment, at the time of hot water supply operation, the tank hot water and the direct hot water are used together immediately after the start of operation, but in the second embodiment, since only the hot water is used, the hot water tank 8 in FIG. The pump 9, the water heat exchange water quantity sensor 11, and the hot water mixing valve 12 are not provided.

10, two refrigerant open / close valves 28 are used for one side 30a of the heat pump refrigerant circuit, between the compressor 1a and the water refrigerant heat exchanger 2, and the compressor 1a and the bath water. The bath water is installed in the heat exchanger for heating, and when the bath water is additionally heated, the refrigerant is circulated to the bath heat exchanger 23 side, and during the other operation, the refrigerant is circulated to the water refrigerant heat exchanger 2 side to control the bath water. At the time of additional heating, only one heat pump refrigerant circuit 30a is operated and the refrigerant is not circulated to the water refrigerant heat exchanger 2 side, so that the heat loss can be reduced and the thermal efficiency can be further improved.

Also in the heat pump configuration of Fig. 10, the improvement effect of the bath water addition heating operation of the present invention does not change at all, and the hot-side water temperature is set by setting the heating side fluid temperature lower than the conventional tank bottom temperature and higher than the remaining hot water temperature circulating from inside the bathtub. There is little fear of return, and improvement of heating efficiency is aimed at.

As described above, the present invention can be applied even if the heating-side fluid in the bath water heat exchanger 23 is a hot water or a refrigerant, and is related to the presence or absence of the boiling water tank 8 and the plural numbers of the heat pump refrigerant circuits 30. It can be applied without having a sufficient effect.

The installation structure of the heat pump hot water supply apparatus, especially the compressor and evaporator which comprise the heat pump refrigerant circuit comprised as mentioned above is summarized in the form and structure shown to FIGS. 11-15. This will be described in the drawings.

11 is a front view of the heat pump hot water supply apparatuses of the first and second embodiments, and a front plate is removed. 12 is a side view of FIG. 11, and FIG. 13 is a top view of FIG.

FIG. 14 is an enlarged view of a portion A of FIG. 13, and FIG. 15 is an enlarged front view of the coolant side heat exchanger tube and the water supply side heat exchanger tube constituting the water refrigerant heat exchanger used in FIG. FIG. 16 is an explanatory view of the deformation part shown in FIG. 15, and FIG. 17 is a view for explaining an embodiment different from FIG.

In the figure, the heat pump hot water supply device main body 31 divides the inside of the box-shaped cabinet 31a into the right and left spaces by the partition plate 37, and the compressors 1a and 1b which comprise a heat pump cycle in the space on the left side. ), Evaporators 4a and 4b, and components such as fans 34 and 35 and electrical box 35 are housed.

On the other hand, in the space on the right side of the partition plate 37, a water refrigerant heat exchanger 2 provided in a spiral (coil) shape, and a cylindrical water storage tank 8 inserted into the coil portion of the water refrigerant heat exchanger 2; And components such as an additional heating heat exchanger (not shown) located at a corner portion on the rear side of the right side space, and an electrical appliance box 41 located on the front surface side of the water refrigerant heat exchanger 2. It is. That is, the partition plate 37 cuts off and heat-blocks the evaporators 4a and 4b side and the water storage tank 8 side. The base 38 of the bottom portion of the box-like cabinet 31a is lifted from the mounting surface by the legs 42.

Moreover, the partition plate 37 is bent so that it may turn to the inner side of the water storage tank 8 in the back side of the box-shaped cabinet 31a. Thereby, even if the width | variety of the box-shaped cabinet 31a is narrowed, the required heat dissipation area of the evaporators 4a and 4b is ensured. The water refrigerant heat exchanger 2 is configured by thermally contacting the refrigerant side heat transfer tubes 2a and 2b and the water supply side heat transfer tubes 2c and 2d.

The compressors 1a and 1b and the water storage tank 8 are respectively fixed to and supported by the base 38. In addition, the upper space in which the evaporators 4a and 4b and the fan 34 are provided, and the lower space in which the compressors 1a and 1b are installed, are partitioned by the partition plate 39. As shown in the figure, the partition plate 39 is provided so as to cover the upper surface side and the front surface side of the compressors 1a and 1b. That is, the compressor chamber 32 of the compressors 1a and 1b is partitioned by the base 6, the partition plate 39, the partition plate 37, and the front and rear walls and the side walls of the box cabinet 31a. have. In particular, the compressors 1a and 1b are formed to have a cylindrical outer shape, and are arranged side by side in the box-like cabinet 31a with the cylindrical axis of the outer side in the transverse direction as shown in FIG.

The evaporators 4a and 4b are divided into two stages of upper and lower sides, or are composed of two refrigerant circuits arranged in combination. For example, the evaporators 4a and 4b arrange | position the heat exchanger tube which comprises a refrigerant | coolant circuit in a meandering shape, and are formed with what is called a cross fin tube type heat exchanger which has a fin in a some inside. In addition, the evaporators 4a and 4b are formed as an outer portion of the L-shaped bending and heat pump hot water supply device 31 so as to form most of one side and the rear surface of the box-shaped cabinet 31a as shown in FIG. .

In addition, the fan 34 is attached to the attachment leg 43 provided along the evaporators 4a and 4b up and down as shown in FIG. This fan 34 blows air from the outside of the box-shaped cabinet 31a, blows it out to the front side of the hot water supply main body 31, and forcibly evaporates the low temperature low pressure refrigerant in the evaporators 4a and 4b.

The electrical appliance box 35 forms an upper surface of the box-shaped cabinet 31a, and a control circuit for controlling the operation of the compressors 1a and 1b and the fan 34 is housed in the electrical appliance box 35. . In addition, the second electrical appliance box 41 is disposed on the front surface of the box-shaped cabinet 31a, and in the electrical appliance box 41, operation settings such as a remote control of the heat pump hot water supply device 31, and each sensor. The control circuit for stopping the operation of the heat pump hot water supply circuit according to the detected value is stored.

Further, the water refrigerant heat exchanger 2 is formed by winding the coolant side heat transfer tubes 2a and 2b and the water supply side heat transfer tubes 2c and 2d around the outer circumference of the water storage tank 8. For example, the coolant side heat transfer tubes 2a and 2b are alternately overlapped to form a coil shape, and the water supply side heat transfer tubes 2c and 2d are wound to their overlapping portions and thermally and firmly joined by soldering or the like. . In addition, the upper ends of the refrigerant-side heat transfer tubes 2a and 2b are connected to the discharge side of the compressors 1a and 1b via piping, and the lower ends thereof are one end of the evaporators 4a and 4b via piping, expansion valves, and piping. Connected to the negative. The other ends of the evaporators 4a and 4b are connected to the suction side of the compressors 1a and 1b via piping.

Next, in FIG. 14, detection of hot water temperature (heat amount) heated by the water refrigerant heat exchanger 2 and stored in the water storage tank 8 will be described.

It is a temperature sensor, for example a tank thermistor, which manages the hot water temperature stored in the water storage tank 8. The tank thermistors 8a to 8c are attached to the upper and lower surface positions of the water storage tank 8. The upper and lower tank thermistors 8a and 8c are attached to the space where the water refrigerant heat exchanger 2 is not wound.

In addition, although the surface of the water storage tank 8 is covered with the heat insulating material 44, the part to which these tank thermistors 8a and 8c are attached is made into a notch window. The heat insulator 44 has an opening at a position where the tank thermistors 8a and 8c are directly attached to the water storage tank 8 surface. And the tank thermistor 8b is attached to the center part of the vertical water storage tank 8.

Naturally, the water refrigerant heat exchanger 2 is provided on the surface of the water storage tank 8 via the heat insulating material 44. The deformable portion 46 is provided almost at the center of the water refrigerant heat exchanger 2.

This deformation | transformation part 46 has the shape which protruded about another part by partially expanding the winding pitch of the heat exchanger tubes 2a-2d which comprise a water refrigerant heat exchanger, making a winding diameter partially larger.

As shown in the figure, an approximately triangular triangle is formed, and a finger is inserted into the surface of the storage tank 8 from the triangle to attach the temperature sensor to the surface of the storage tank 8.

The cutout window 45 is provided in the heat insulating material 44 corresponding to this deformation | transformation part 46, and when a heat insulation cover 44b in the cutout window 45 is removed from the deformation | transformation part 46, a finger is inserted and a water storage is performed. The tank thermistor 8b can be attached to or detached from the tank 8. Of course, the cutout window 45 is occluded by the heat insulating cover 44b at the time of operation.

The deformable portion 46, which is formed by partially expanding the refrigerant-side heat transfer tube and the water supply-side heat transfer tube that are in thermal contact, faces the corner portion of the rectangular cabinet constituting the outline of the hot water heater main body 31. In other words, the deformation | transformation part 46 is located in the invalid space of the hot water supply apparatus main body 31. FIG.

In addition, since the water refrigerant heat exchanger (2) has a shape wound through the heat insulating material (44) from the upper portion to the lower portion of the water storage tank (8) as shown in FIG. 15, the refrigerant-side heat transfer tubes (2a, 2b) And water supply-side heat transfer tubes 2c and 2d are very long.

As a result, this winding work is not only large-scale but also very heavy, making it difficult to work by human hands.

For this reason, the water refrigerant heat exchanger 2 may be divided into two upper and lower portions, and may be connected to the preceding deformation portion 46. This structure solves the problem that the water refrigerant heat exchanger (2) in which the preceding heat exchanger tube is lengthened is too heavy before the assembly of the device, and also, the welding tank (2) is used to weld the heat transfer tubes of the two water refrigerant heat exchangers (2). 8) and the heat insulating material 44, etc., do not give a heat influence.

The space keeping pipe 47 does not have a length that covers the entire circumference of the water storage tank 8, but is, for example, a pipe having a length of half or two thirds of a circumference.

This pipe 47 is arrange | positioned in the part which expanded the winding pitch of the substantially center of the water refrigerant heat exchanger 2, and is arrange | positioned so that the water refrigerant heat exchanger 2 may not produce position shift.

In other words, the deformation | transformation part 46 is provided in the part which inserted this pipe 47. As shown in FIG. In other words, since the pipe 47 does not have a length enough to wind the entire circumference, there is a portion without the pipe 47 by half or 1/3. It becomes possible to arrange | position the pipe deformation | transformation part 46 in the part in which this pipe 47 is absent.

Thereby, a finger can be inserted into the water storage tank 8 side from the deformation | transformation part 46, and the tank sensor 8b can be attached and detached. Of course, at this time, the heat insulation cover 44b in the cutout window 45 is removed beforehand.

Next, in Figs. 16 and 17, the heat exchange pipe 48 is made up of a refrigerant-side heat exchanger tube and a water supply-side heat exchanger tube. As shown in Fig. 16, the deformable portion 46 is provided by protruding a portion of the pipe 48 by two stages to form the deformable portion 46, as shown in the figure.

In this case, the preceding space keeping pipe 47 is not necessary. In addition, the temperature sensor (tank sensor 8b) is attached to the water storage tank 8 by inserting a finger from the opening made by the dimension L1 like arrow P1.

The dimension L1 is selected to a dimension that can facilitate attachment and removal of the temperature sensor.

FIG. 17 shows a deformation 46 which partially enlarges the winding pitch of the pipe 48 and also protrudes a part of the pipe 48 outward.

In Fig. 17, the above-described spacing pipe 47 is required. The diameter or the length of the pipe 48 of the space keeping pipe 47 varies depending on the magnitude of the dimension L1. Desorption of the temperature sensor (tank sensor 8b) to the tank 8 in FIG. 17 is performed in the state which removed the heat insulation cover 44b from arrow P1 similarly to FIG. Naturally, the selection of the L1 dimension is the same as that in FIG.

By configuring as described above, not only can the service inspection of the tank sensors 8a to 8c be easily performed at the time of assembling, but also the amount of remaining hot water in the water storage tank 8 can be accurately confirmed, and an accurate operation instruction can be issued. It can be.

That is, the upper tank sensor 8a not only detects a hot water break in the storage tank 8 but also determines whether the temperature in the storage tank is a proper temperature.

The intermediate tank sensor 8b determines how much hot water remains in the water storage tank 8 and whether the temperature is at an appropriate temperature. In other words, it is used as a trigger for reheating.

The lower tank sensor 8c determines whether the reheating completion and the temperature of the hot water in the lower tank are appropriate temperatures.

In the hot water supply apparatus main body 31 having such a configuration, for example, when starting the hot water operation, the hot water mixing valve 12 in the hot water circuit together with the heat pump operation shown in FIG. The hot water tank 8 side is opened, the cold / hot water mixing valve 13 side is closed, and the cold / hot water open / close valve 25 is closed. In addition, the operation of the in-flight circulation pump 9 is started, and the in-flight circulation pump 9, the water heat exchange water quantity sensor 11, the water refrigerant heat exchanger 2, and the hot water mixing valve are discharged from the water outlet of the lower portion of the water storage tank 8. (12), the water circulates to the storage tank (8). As a result, when the hot water heated by the water refrigerant heat exchanger 2 is heated from the upper portion of the water storage tank 8, and the entire water storage tank 8 reaches the boiled state, it is determined that the water heating is completed and the operation is stopped. In this case, the above-described tank sensors 8a to 8c play their respective roles.

Since this embodiment has the configuration as described above, the following effects can be obtained.

That is, the refrigerant-side heat exchanger tube constituting the water-cooled heat exchanger of the heat pump cycle and the water supply-side heat transfer tube are thermally contacted, wound in a spiral shape on the outer periphery of the cylindrical water storage tank, and hot water heated by the water refrigerant heat exchanger is stored in the water storage tank. In a heat pump hot water supply device, wherein the hot water is heated and the amount of stored hot water is detected by a temperature sensor attached to the surface of the hot water tank, the distance from the hot water tank to the coolant side heat transfer pipe and the water supply side heat transfer pipe wound in the spiral shape is partially. Since the winding deformation | transformation part extended to the outside is provided and the temperature sensor can be attached to the storage tank surface from the outside using this winding deformation | transformation part, the temperature of the storage tank in which both pipes are wound, for example, center, etc. It can be measured accurately. Further, this can be facilitated even when the temperature sensor is replaced by a service or the like.

In addition, since a cutout window is made in the heat insulating material of the part corresponding to the winding deformation | transformation part of a refrigerant | coolant side heat exchanger tube and a water supply side heat exchanger tube, and a temperature sensor was detachably attached to the water storage tank surface through the cutout window, Even if the heat insulating material is interposed, it can pass through the heat insulating material and measure the surface temperature of a boiling tank.

In addition, the gap between the deformed portion made by partially expanding the refrigerant-side heat pipe and the water-side heat pipe wound in a spiral shape at the same pitch is a gap in which the temperature sensor attached to the water storage tank surface can be easily detached. In service, the operator can easily attach and detach the temperature sensor with his or her hand using the gap caused by the previous pitch enlargement and pipe deformation.

In addition, the position of the deformable portion formed by partially expanding the refrigerant-side heat transfer tube and the water supply-side heat transfer tube that are thermally in contact with each other is opposed to the corner portion of the rectangular cabinet constituting the outline of the hot water supply apparatus main body. The deformable portion can be stored without expanding.

In addition, both pipes wound on the vertical type storage tanks are interposed between the thermally maintained pipes that maintain the enlarged dimension between the winding pitch enlarged portions of the water-cooled heat exchanger consisting of the refrigerant-side heat pipe and the water-side heat pipe. Since the enlarged portion is not reduced by the weight, the deformed portion is always kept in a constant shape, and the detachment of the temperature sensor through the deformed portion can be easily performed.

In the case of attaching a plurality of temperature sensors to the vertically arranged storage tanks, the upper and lower temperature sensors are used at portions where the refrigerant-side heat transfer pipe and the water supply-side heat transfer pipe pipe are not wound, and the intermediate temperature sensor is wound on both pipes. Since the pitch is expanded and the pipe is partially installed in the enlarged deformation portion, the hot water amount (heat quantity) of the storage tank can be accurately measured, and a predetermined amount of water is always stored in the storage tank by automatic operation or the like. The amount of hot water can be secured.

In addition, since the refrigerant-side heat transfer tubes and the water supply-side heat transfer tubes of the two sets of heat pump cycles are thermally contacted and wound around the storage tank outer periphery via a heat insulating material, the storage tank can be miniaturized and, of course, a predetermined amount of time can be reduced. The temperature can raise the temperature of the feed pipe tube.

In addition, the water refrigerant heat exchanger wound in the water storage tank is constituted by the first and second water refrigerant heat exchangers in advance, and the connecting portion of the first and second water refrigerant heat exchangers is a winding deformation portion in which the distance from the water storage tank is partially enlarged. In order to use the connection pipe for the connection between the water refrigerant heat exchanger pipes, a portion different from the front and rear tube diameters, but the tube diameters differing from the winding of the outer periphery of the water storage tank is expanded to the outside, so that the other portions have the same pitch. Moreover, it winds up with the same diameter.

In addition, since welding can also be performed easily because it is spaced apart from a tank, it completes without using a long pipe. This improves productivity.

As described above, according to the present invention, it is possible to accurately measure the temperature of the storage tank, for example, the central portion, in which the water refrigerant heat exchanger pipe and the water supply side heat exchanger pipe of the heat pump cycle are wound. In addition, this can also be easily performed when the temperature sensor is replaced by a service or the like.

Claims (8)

The water refrigerant heat exchanger of the heat pump cycle is installed with the refrigerant side heat exchanger tube and the water supply side heat exchanger tube being in thermal contact with each other, and is disposed in a spiral shape on the outer periphery of the cylindrical water storage tank, and the hot water heated by the water refrigerant heat exchanger is used for storing the hot water tank. A heat pump hot water supply device configured to detect a hot water amount stored inside and detected by a temperature sensor attached to a surface of the hot water tank, In the spiral refrigerant-side heat exchanger tube and the water supply-side heat exchanger tube, a winding deformation portion is provided in which the distance from the water storage tank is partially extended to the outside, and using this winding deformation portion, the temperature sensor can be attached to the surface of the water storage tank from the outside. A heat pump hot water supply device, characterized in that. The cut-off window is provided in the heat insulating material of the part corresponding to the said winding deformation | transformation part of the said refrigerant | coolant side heat exchanger tube and the said water supply side heat exchanger tube, and the temperature sensor is provided in the surface of the water storage tank facing the cut-out window. Heat pump hot water supply device. The gap between the deformable portion in which the refrigerant-side heat transfer pipe wound around the pitch and the water supply-side heat transfer pipe partially enlarged in a spiral shape can be easily detached from the temperature sensor attached to the water storage tank surface. The heat pump hot water supply apparatus characterized by the above-mentioned. The position of said deformation | transformation part in which the said refrigerant | coolant side heat exchanger tube and the said water supply side heat exchanger tube partly extended outward is opposed to the edge part of the rectangular cabinet which comprises the outer side of the water heater device. Heat pump hot water supply device. The heat pump hot water supply apparatus according to claim 1, wherein an interval maintaining pipe for maintaining an enlarged dimension is interposed between a winding pitch enlargement portion of the water refrigerant exchanger comprising the refrigerant side heat transfer tube and the water supply side heat transfer tube. . The water storage tank according to claim 1, wherein a plurality of temperature sensors are provided in a vertically-type storage tank, and upper and lower temperature sensors are provided in a portion where the refrigerant-side heat transfer tube and the water supply-side heat transfer tube are not wound. A heat pump hot water supply device, characterized in that the winding pitch of the both heat transfer tubes is enlarged, and the heat transfer tube is partially enlarged. The heat pump hot water supply apparatus according to claim 1, wherein the refrigerant-side heat transfer tube and the water supply-side heat transfer tube of the two sets of heat pump cycles are thermally contacted and installed in an outer peripheral portion of the water storage tank via a heat insulating material. 2. The water cooling heat exchanger of claim 1, wherein the water refrigerant heat exchanger wound in the water storage tank is formed of first and second water refrigerant heat exchangers in advance, and the connection portion of the first and second water refrigerant heat exchangers is separated from the water storage tank. A heat pump hot water supply apparatus comprising a winding deformation portion that is partially enlarged.

Images