CN100478626C - Heat-pump hot water supply apparatus - Google Patents

Abstract

The objective of the invention is to solve a problem on difficulty in service check as a temperature sensor mounted on the surface of a hot water storing tank is disturbed by a water-refrigerant heat exchanger, in a water heater with a heat pump cycle formed by winding the water-refrigerant heat exchanger composed of a refrigerant-side heat transfer pipe and a water supply-side heat transfer pipe on an outer periphery of the vertically-long hot water storing tank at equal pitches. In this heat pump water heater wherein the refrigerant-side heat transfer pipe and the water supply-side heat transfer pipe constituting the water-refrigerant heat exchanger of the heat pump cycle are thermally kept into contact with each other, and spirally wound on the outer periphery of the cylindrical hot water storing tank, the warm water heated by the water-refrigerant heat exchanger is stored in the hot water storing tank, and the amount of stored hot water is detected by a temperature sensor mounted on the surface of the hot water storing tank, a winding deformation portion where a distance from the hot water storing tank is partially expanded outward, is formed on the refrigerant-side heat transfer pipe and the water supply-side heat transfer pipe spirally wound, and the temperature sensor can be mounted on the surface of the hot water storing tank from the external by utilizing the winding deformation portion.

Description

Heat-pump hot water supply apparatus

Technical field

The present invention relates to heat-pump hot water supply apparatus.

Background technology

Heat-pump hot water supply apparatus in the past, all use common hot water storage mode, promptly, the big capacity hot water storing tank that the capacity that is provided with is identical with electrothermal heater's capacity, use cheap at night discounted electric power in advance, use heat pump circuit boiled at night, be stored in the hot water storing tank, in order to using daytime hot water.

, in above-mentioned hot water storage mode, have only hot water storage in hot water storing tank the hot water storage loop and from hot water storing tank to the hot water supply loop that uses terminal provisioning hot water.

Like this, when being used to have a bath, when a lot of people's balneation is arranged when pile hot water in bathing pool after, because hot water cooling and need append heat the time, but owing to have only merely function from the hot water storing tank hot-water supply, thereby can not take other adequate measures.

As the countermeasure of improving above-mentioned situation, in recent years, had on stored hot water mode in the past, to add water for bathing has been appended the device of the function of heat.In TOHKEMY 2002-106963 communique (patent documentation 1), this class heat-pump hot water supply apparatus is disclosed, it is the mode of carrying out heat exchange with the cold-producing medium that makes hot water in the bathing pool (bathtub) and high temperature, the heat-transfer pipe that the supplementary heating that the heat-transfer pipe that cold-producing medium is used, the heat-transfer pipe that stored hot water is used and water for bathing are used is used is arranged in whole water-refrigerant heat exchanger (radiator), hot water with in the refrigerant temperature heating bathing pool of the water boiling that makes hot water storing tank carries out the supplementary heating of water for bathing.

In addition, as the mode of carrying out heat exchange with the hot water that is stored in the bathing pool, also have disclosed in TOHKEMY 2003-336894 communique (patent documentation 2), outside the heat exchanger that stored hot water is used, the water for bathing heat exchanger is set in addition, with this water for bathing heat exchanger, make that remaining hot water carries out heat exchange in the high-temperature-hot-water that is stored in the uniform temperature in the hot water storing tank and the bathing pool, so that water for bathing is carried out supplementary heating.

In addition, water-refrigerant heat exchanger that the heat-transfer pipe of being used by above-mentioned cold-producing medium, the heat-transfer pipe that stored hot water is used constitute is wound on the excircle of hot water storing tank.

Also have, a plurality of temperature sensors have been installed on the surface of above-mentioned hot water storing tank, in order to having or not of the hot water amount in the detection hot water storing tank, perhaps temperature of hot water or the like turns round so that carry out heat pump.

; after being installed in water-refrigerant heat exchanger on the hot water storing tank; the heat-transfer pipe of water-refrigerant heat exchanger that heat-transfer pipe constituted of being used by this cold-producing medium heat-transfer pipe, stored hot water will hinder the loading and unloading of said temperature sensor; existence can't be loaded and unloaded these temperature sensors, particularly the problem of Zhong Jian temperature sensor.

In above-mentioned heat-pump hot water supply apparatus in the past, run through a kind of " night, the electricity charge of running were cheap; store some hot water as far as possible in hot water storing tank more " such idea, and the efficiency of heating surface (that is the so-called COP that represents with the electric power of heating efficiency ÷ consumption) that is caused because of the heating-up temperature difference in the running of supplementary heating in water for bathing is not carried out any consideration.

Therefore, owing to think in water for bathing supplementary heating running, heating with the hot water temperature who stores in the hot water storing tank is matter of course, in any one example in the past, all be the fluid of heated side to be heated to the certain high temperature state suitable with stored hot water temperature with heat exchange, thereby in the process of balneation, carry out supplementary heating when running, might reflux near the high-temperature-hot-water that has surpassed the stored hot water of preference temperature, and, from efficiency of heating surface aspect, neither optimal control mode.

In addition, in the heat-pump hot water supply apparatus of the water-refrigerant heat exchanger of on the excircle of hot water storing tank, reeling, for the correct temperature that is stored in the hot water in the hot water storing tank of grasping, a plurality of temperature sensors are installed, and these temperature sensors are managed is very important.For temperature sensor is managed constantly, requirement will be drunk a little temperature sensors and be made the mounting structure of being convenient to frequent maintenance, yet, the scheme that solves is all proposed in the formerly known example on this problem.

Summary of the invention

The present invention proposes in order to solve the problems referred to above that existed in the past, its objective is provides the backflow of a kind of cancellation at the high-temperature-hot-water of water for bathing supplementary heating running, the heat-pump hot water supply apparatus that can increase substantially the efficiency of heating surface of heat pump running compared with the past.

Another object of the present invention is, provides a kind of hot water temperature in the hot water storing tank is often managed, and can carry out the heat-pump hot water supply apparatus of the running of hot-water supply device expeditiously.

Heat-pump hot water supply apparatus of the present invention, for solve above-mentioned in the past the water for bathing supplementary heating running of heat-pump hot water supply apparatus in problem, the cold-producing medium amount of restriction of decompressor when being conceived to reduce the heat pump running, it is slowly run, when reducing its heating-up temperature, improve its running efficiency, and in heat exchanger also when reducing the heated side temperature, reduce the heat that distributes towards periphery, and no matter stored hot water temperature in the past, by being reduced to the heated side fluid temperature (F.T.) of heat exchanger, water for bathing is lower than the stored hot water temperature, thereby can eliminate the backflow of high-temperature-hot-water, and improve the efficiency of heating surface.In addition, can also correctly grasp the interior hot water temperature of above-mentioned hot water storing tank all the time.

That is, this heat-pump hot water supply apparatus has following each several part: the heat pump refrigerating agent loop of evaporimeter that has connected compressor, the water-refrigerant heat exchanger of carrying out the heat exchange of water and cold-producing medium, decompressor successively, carried out the heat exchange of air and cold-producing medium by refrigerant tubing; By above-mentioned water-refrigerant heat exchanger, store in advance by hot water storing tank that water-the refrigerant heat exchanger heated hot water is used, make machine internal circulation pump, hot water mixing valve, the flow control valve of the hot water circuit in the machine, and be connected the hot water supply loop that the water pipe between these parts constitutes; Carry out the water for bathing heat exchanger of heat exchange of the fluid of hot water in the bathing pool and heated side; By the water for bathing circulating pump, the flow switch that make the hot water circuit in the above-mentioned bathing pool, and be connected the water for bathing supplementary heating loop that the water pipe between these parts constitutes; The operation controller of the course of work of control above-mentioned compressor, decompressor, machine internal circulation pump, hot water mixing valve, flow control valve, water for bathing circulating pump etc.Water for bathing supplementary heating running is when allowing the bathing water circulate in machine, also carry out the heat pump running, make the heated side fluid temperature (F.T.) of above-mentioned water for bathing with heat exchanger, control to such an extent that be lower than the temperature of the stored hot water of holding vessel, and, be higher than the temperature that flows out the surplus hot water of circulating in the bathing pool.In addition, because when the water for bathing supplementary heating turn round, also carry out the heat pump running, do not use the hot water in the hot water storing tank, so, can be after just not carrying out the water for bathing supplementary heating and turning round, there is not the danger of the hot water that can supply.

According to said structure, be stored in the hot water temperature in the hot water storing tank during with respect to the heat pump running of water for bathing supplementary heating in the past running, because heat pump running of the present invention is to turn round with the temperature that is lower than the stored hot water temperature, so, in the possibility that high-temperature water in eliminating bathing pool returns, can also help improving the efficiency of heating surface.

In addition, water-the refrigerant heat exchanger of heat pump cycle is being arranged to the refrigerant side heat-transfer pipe and the water supply side heat-transfer pipe carries out heat transfer contact, and be arranged on the excircle of cylindrical shape hot water storing tank, to have spiral helicine shape, to utilize water-refrigerant heat exchanger heated hot water to be stored in the above-mentioned hot water storing tank, and utilize be installed in the lip-deep temperature sensor of hot water storing tank detect stored hot water amount heat-pump hot water supply apparatus in, because on above-mentioned spiral helicine refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, be provided with certain distance and the local coiling crushed element that enlarges laterally that leaves above-mentioned hot water storing tank, and be provided with and utilize this coiling crushed element, can be installed in temperature sensor from the outside the lip-deep space of hot water storing tank; Thereby, can correctly measure the two tubes of having reeled hot water storing tank for example central authorities temperature.In addition, in the time when maintenance waits, need changing above-mentioned temperature sensor, also can change easily.

In addition because on the heat-insulating material at the position corresponding, window is set with the coiling crushed element of refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, from this window on the surface of hot water storing tank, temperature sensor is installed; Thereby, even there is heat-insulating material to cover on the surface of hot water storing tank, also can cross this heat-insulating material, measure the temperature on hot water storing tank surface.

In addition, with etc. pitch be wound into the local space that enlarges the crushed element that forms of spiral helicine refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, be installed in the lip-deep temperature sensor of the hot water storing tank big space of ratio temperature sensor of loading and unloading easily as making.Therefore, the operator just can utilize the space by enlarging spacing and pipe deformation being formed originally when when assembling or maintenance, use the hand of oneself to carry out the loading and unloading of temperature sensor easily.

In addition, because to make the refrigerant side heat-transfer pipe that carries out heat transfer contact and water supply side heat-transfer pipe part enlarge the position of crushed element of formation laterally relative with the bight of the rectangular case of the outline of formation hot-water supply device main body; Thereby, needn't enlarge the profile of hot-water supply device, also can hold crushed element down.

In addition, because between the coiling pitch enlarged of the water-refrigerant heat exchanger that is constituted by refrigerant side heat-transfer pipe that carries out heat transfer contact and water supply side heat-transfer pipe, accompany the interval holding tube that keeps this expansion size, and can enlarged be dwindled because of the weight that is wound on the two tubes itself on the vertical hot water storing tank, thereby, crushed element can keep certain shape all the time, and can be easily by this crushed element loading and unloading temperature sensor.

In addition, because when on the hot water storing tank in vertical configuration a plurality of temperature sensor being installed, upper and lower temperature sensor is installed on the part that is not wound with refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, the coiling pitch that middle temperature sensor is installed in above-mentioned two kinds of heat-transfer pipes enlarges, and makes on the local crushed element that enlarges of above-mentioned heat-transfer pipe; Thereby, just can correctly measure hot water amount's (heat) of hot water storing tank, in running automatically etc., guarantee in hot water storing tank, to have the hot water of ormal weight all the time.

In addition, [be configured to carry out contacting of heat exchange, and have across heat-insulating material and they are wound on shape on the excircle part of hot water storing tank because the refrigerant side heat-transfer pipe that makes two groups of heat pump cycles and water supply side heat-transfer pipe; Thereby, except must making the hot water storing tank miniaturization, can also make the tube temperature of water supply side heat-transfer pipe rise to the temperature of regulation at short notice.

In addition, the water-to-water heat exchanger owing to being wound on the hot water storing tank is made of first, second water-to-water heat exchanger in advance, and the coiling crushed element of the coupling part of this first, second water-to-water heat exchanger as the local expansion of distance of leaving hot water storing tank; Thereby, in order to use tube connector to connect between the pipe of water-refrigerant heat exchanger, though forward and backward caliber difference, but, the outside of the winding radius of the excircle by the different part of this caliber being expanded to hot water storing tank, thus other parts can both be wound into same pitch and same diameter.

In addition, can carry out at an easy rate away from holding vessel owing to weld, thereby can use long pipe.Therefore, also improved productivity ratio.

As mentioned above, according to the present invention, can correctly measure the temperature of for example middle body of the hot water storing tank of the water-refrigerant heat exchanger pipe of the heat pump cycle of having reeled and water supply side heat-transfer pipe pipe.In addition, even when keeping in repair etc., will change above-mentioned temperature sensor the time, also can change at an easy rate.

Description of drawings

Fig. 1 is the schematic diagram of ㄟ embodiment of general configuration of heat pump refrigerating agent loop, hot water supply loop, operation controller and the various parts of expression heat-pump hot water supply apparatus of the present invention;

The flow chart of the affirmation course of work when Fig. 2 is the installation of heat-pump hot water supply apparatus of table one embodiment of the present of invention and connecting pipe;

Fig. 3 is the flow chart of the course of work in stored hot water when running of the heat-pump hot water supply apparatus of expression one embodiment of the present of invention;

The flow chart of the course of work when Fig. 4 is the use hot water of heat-pump hot water supply apparatus of expression one embodiment of the present of invention;

Fig. 5 is the flow chart of the course of work of expression water for bathing when automatically the water for bathing of running is poured water;

Fig. 6 is the automatically flow chart of the course of work during the water for bathing insulation of running of expression water for bathing;

Fig. 7 is the expression water for bathing heated side fluid of heat exchanger and the temperature difference of bathing pool water, and the curve map of an example of the relation between the efficiency of heating surface;

Fig. 8 is under the situation of some cooling of hot water remaining in the expression bathing pool, through one water for bathing supplementary heating period, and the curve map of the desired temperature of the variations in temperature of bathing pool water and heated side fluid;

Fig. 9 is under the quite cold situation that needs the supplementary heating running of hot water remaining in second day bathing pool, through one water for bathing supplementary heating period, and the curve map of the desired temperature of the variations in temperature of bathing pool water and heated side fluid;

Figure 10 is the schematic diagram of general configuration of heat pump refrigerating agent loop, hot water supply loop, operation controller and parts of the heat-pump hot water supply apparatus of an alternative embodiment of the invention;

Figure 11 is front view heat-pump hot water supply apparatus, when front panel is taken off of present embodiment;

Figure 12 is the side view of Figure 11;

Figure 13 is the vertical view of Figure 11;

Figure 14 is the enlarged drawing of the A portion of Figure 13;

Figure 15 is the water-refrigerant heat exchanger pipe that is used for Figure 12 and the amplification front elevation of water supply side heat transfer pipe;

Figure 16 is the key diagram of crushed element shown in Figure 15;

Figure 17 is the key diagram of the embodiment different with Figure 16.

The specific embodiment

Below, with reference to description of drawings one embodiment of the present of invention.

Embodiment 1

At first, with reference to Fig. 1 embodiments of the invention 1 are described.

Heat-pump hot water supply apparatus is made of heat pump refrigerating agent loop 30, hot water supply loop 40 and operation controller 50.

Heat pump refrigerating agent loop 30 is that each part respectively has two double circulation loop, is to pass through refrigerant tubing respectively, and following each several part is connected in turn to be constituted: compressor 1a, 1b; Be arranged in refrigerant side heat- transfer pipe 2a, 2b in water-refrigerant heat exchanger 2; Decompressor 3a, 3b; Evaporimeter 4a, 4b.In these two loops, all encapsulated cold-producing medium.

The capacity of compressor 1a, 1b can be controlled, and when a large amount of hot-water supply, it just turns round with big capacity.At this moment, compressor 1a, 1b are by means of the combination control of PWM control, Control of Voltage (for example, PAM control) and these two kinds of controls, and its running speed is controlled at low speed (for example 700 rev/mins) at a high speed between (for example, 7000 rev/mins).

The structure of water-refrigerant heat exchanger 2 is: have refrigerant side heat- transfer pipe 2a, 2b and water supply side heat- transfer pipe 2c, 2d, carry out heat exchange between cryogen side heat- transfer pipe 2a, 2b and water supply side heat- transfer pipe 2c, 2d.

As decompressor 3a, 3b, use expansion valve etc. usually, the middle temperature high-pressure refrigerant of sending here through water-refrigerant heat exchanger 2 is reduced pressure, make its low pressure refrigerant that becomes easy evaporation after, send into evaporimeter 4a, 4b again.In addition, decompressor 3a, 3b also work the amount of restriction that changes coolant channel, regulate the effect of the circulating mass of refrigerant in the heat pump circuit, and do not carrying out above-mentioned throttling, warm cold-producing medium in is in a large number sent among evaporimeter 4a, the 4b task with the defroster that carries out defrosting.

In addition, evaporimeter 4a, 4b are that air-refrigerant heat exchanger by the heat exchange of carrying out air and cold-producing medium constitutes.

Hot water supply loop 40 constitutes by having the various water-flow circuits that are used to carry out hot water storage, directly hot-water supply, holding vessel hot-water supply, holding vessel supplementary heating, the hot and dry water of lavation, water for bathing supplementary heating.

The hot water storage loop connects following each parts successively by water pipe and constitutes: hot water storing tank 8, machine internal circulation pump 9, heat exchange water quantity sensor 11, water supply side heat- transfer pipe 2c, 2d, hot water supply mixing valve 12, hot water storing tank 8.

Directly the hot-water supply loop connects following each parts successively by water pipe: water supply pipe joint 5, pressure-reducing valve 6, water-supply quantity sensor 7, water supply check valve 10, heat exchange water quantity sensor 11, water supply side heat- transfer pipe 2c, 2d, hot water supply mixing valve 12, hot water mixing valve 13, flow control valve 14, kitchen hot water supply pipe joint 15.

In addition, water supply pipe joint 5 is connected on the watering of running water pipe and so on,, kitchen hot water supply pipe joint 15 then is connected with kitchen faucet 16 etc.

Holding vessel hot water supply loop connects following each parts successively by water pipe and constitutes: water supply pipe joint 5, pressure-reducing valve 6, water-supply quantity sensor 7, hot water storing tank 8, hot water supply mixing valve 12, hot water mixing valve 13, flow control valve 14, kitchen hot water supply pipe joint 15.

Holding vessel supplementary heating loop connects following each parts successively by water pipe and constitutes: hot water storing tank 8, machine internal circulation pump 9, heat exchange water quantity sensor 11, water supply side heat- transfer pipe 2c, 2d, hot water supply mixing valve 12, hot water storing tank 8.

The hot and dry water loop of lavation connects following each parts successively by water pipe and constitutes: water supply pipe joint 5, pressure-reducing valve 6, water-supply quantity sensor 7, water supply check valve 10, heat exchange water quantity sensor 11, water supply side heat- transfer pipe 2c, 2d, hot water supply mixing valve 12, hot water mixing valve 13, flow control valve 14, the hot and dry water valve 17 of lavation, flow switch 18, water for bathing circulating pump 19, hot water turnover pipe joint 20, water for bathing circulation control valve 21, bathing pool 22.In addition, hot water turnover pipe joint 20 connects into can be to bathing pool 22 hot-water supplies, also can be to water for bathing tap 26 and shower nozzle (not shown) hot-water supply.

In addition, when the hot and dry water of lavation, except by the direct hot-water supply of the hot and dry water loop of above-mentioned lavation, do not allowing the hot water amount of hot water storing tank 8 be in the scope below the minimum necessary amount, also can be from hot water storing tank 8 to bathing pool 22 hot-water supplies.

Water for bathing supplementary heating loop connects following each parts successively by water pipe and constitutes: bathing pool 22, water for bathing circulation control valve 21, hot water turnover pipe joint 20, water for bathing circulating pump 19, flow switch 18, water for bathing heat-transfer pipe 23b, bathing water's outlet pipe connection 24, water for bathing circulation control valve 21, bathing pool 22.

In addition, when the water for bathing supplementary heating, in the water circulation that makes bathing pool water by above-mentioned water for bathing supplementary heating loop, also make heat pump and 9 runnings of machine internal circulation pump, so that water-refrigerant heat exchanger 2 heated hot water water for bathing with heat exchanger 23 set hot water heat-transfer pipe 23a in circulate, between hot water heat-transfer pipe 23a and water for bathing heat-transfer pipe 23b, carry out heat exchange, water for bathing is carried out supplementary heating.

Secondly, operation controller 50 is by setting the operation of kitchen remote controller 51 and water for bathing remote controller 52, carry out the running in heat pump refrigerating agent loop 30, stop and compressor 1a, the rotation control of 1b, and by regulating decompressor 3a, the cold-producing medium amount of restriction of 3b, and running, stop machine internal circulation pump 9, water for bathing circulating pump 19, with control hot water supply mixing valve 12, the hot water mixing valve 13, flow control valve 14, the hot and dry water valve 17 of lavation, hot-water switch valve 25 carries out the running of stored hot water, the directly running of hot-water supply, the running of holding vessel hot-water supply, holding vessel supplementary heating running, water for bathing is irritated the hot water running, water for bathing supplementary heating running.

In addition, the revolution of operation controller 50 couples of compressor 1a, 1b is controlled, just begun the back in order to shorten the heat temperature raising time in running, and when the smaller water for bathing supplementary heating running of thermic load, then slow-speed of revolution running to answer with heating-up temperature with certain high rotation speed operation.

In addition, used the hot water of supplying with by the use terminal of water after, by after the running of carrying out the holding vessel stored hot water, shutting down, thus no matter when all have in the hot water storing tank hot water of controlling set point of temperature each time be in jar in the hot water storage function of motion of the full state of storage.

Also have, in heat-pump hot water supply apparatus, be provided with following various checkout gear: the water supply thermistor 7a that detects supply water temperature, detect the outlet hot water temperature's of water-refrigerant heat exchanger 2 heat exchange thermistor 2e, detect the stored hot water temperature of hot water storing tank 8 and the holding vessel thermistor 8a of hot water storage amount, 8b, 8c, 8d, detect the hot water temperature's who is supplied hot-water supply thermistor 14a, detect the water for bathing thermistor 18a of the temperature of bathing pool water, and detection compressor 1a, the pressure sensor 1c of the discharge pressure of 1b, 1d, the level sensor 22a of water levels in the detection bathing pool 22.Various detection signals all are input in the operation controller.Operation controller 50 is controlled various parts according to these signals.

In addition, hot-water switch valve 25 is arranged on water-refrigerant heat exchanger 2 and water for bathing is used between the heat exchanger 23, except when the water for bathing supplementary heating, the loop of hot water is closed, leak heats to water for bathing with heat exchanger 23 from water-refrigerant heat exchanger 2 so that prevent.

In addition, water supply check valve 10 is only to allow water flow to a direction, prevents the parts of aqueous reflux; Overflow valve 27 is that the heat hydraulic pressure in hot water storing tank 8 surpasses just action under the situation of authorized pressure, the part in the water loop is played the parts of pressure protect effect.

Below, with reference to heat pump circuit 30 and the hot water supply loop 40 of Fig. 1, and, the operation process of this heat-pump hot water supply apparatus is described according to the flow chart of Fig. 2～Fig. 6.

An embodiment of the flow process of necessity operation when Fig. 2 is the expression installation.

After heat-pump hot water supply apparatus transports from manufactory, be installed in the desirable place that is provided with of user, water supply pipe joint 5 is being connected on the water source of running water pipe and so on, the pipe joint 15 that the kitchen is gone out hot water is connected on the tap 16 in kitchen, the pipe joint 24 that water for bathing is gone out hot water is connected on the water for bathing tap 26 (step 60) afterwards, open the tap 16,26 or the overflow valve 27 (step 61) of the usefulness of dropping a hint, when opening the embolism (step 62) of watering, just begin in machine, to supply water from watering.After by means of pressure-reducing valve 6 adjusting of the pressure of water being reduced to certain pressure, water just flows into hot water storing tank 8 and water-refrigerant heat exchanger 2, and in each bar water pipe (step 63).Flow out from tap 16,26 or overflow valve 27 according to water, be in water-filled state (step 64) afterwards in the affirmation machine, just tap 16,26 and overflow valve 27 are closed, finish in machine, supply water (step 65).

In addition, when heat-pump hot water supply apparatus is installed, the original state of various parts is set as follows: hot water supply mixing valve 12, hot water mixing valve 13 are set at 2-way state, and flow control valve 14, hot-water switch valve 25 are set at open mode, and the hot and dry water valve 17 of lavation is set at closed condition.

Then, connect power switch (step 66), carry out the bathing pool running (step 67) of pouring water.

Bathing pool following the carrying out of running of pouring water: open the hot and dry water valve 17 of lavation, water filling is overflowed (step 68) till the bathing pool to water; By means of level sensor 22a and output sensor 7, calculate the capacity (step 69) of bathing pool automatically; Set the capacity (step 70) of bathing pool.Hot water amount's control when the water for bathing in setting the automatic running of later water for bathing is irritated hot water and water for bathing supplementary heating or the like can be applied in a flexible way.Therefore, the running of pouring water of above-mentioned bathing pool only needs carry out once when setting heat-pump hot water supply apparatus.

Then, Fig. 3 is the embodiment of flow chart of the hot water storage running course of work of the expression water boiling that makes hot water storing tank.

When control by operation controller 50, when sending the instruction of carrying out the hot water storage running (step 71), just carry out the judgement (step 72) of the temperature and the storage capacity of stored hot water by holding vessel thermistor 8a～8d, if in prescribed limit, just no longer carry out such running, when the hot water that stores uses prescribed limit when following, just begin hot water storage running (step 73).

In this hot water storage running (step 73), compressor 1a, 1b entry into service, the gasiform cold-producing medium in compressor 1a, 1b is compressed heating, becomes the cold-producing medium of HTHP, is admitted in water-refrigerant heat exchanger 2.Like this, in water-refrigerant heat exchanger 2, the high temperature refrigerant that flows through in refrigerant side heat-transfer pipe 2a, the 2b just carries out heat exchange with the water that flows through in water supply side heat-transfer pipe 2c, the 2d, and cold-producing medium is emitted heat, and water is heated.After cold-producing medium after the heat radiation is reduced pressure by decompressor 3a, 3b, make its evaporation of expanding by evaporimeter 4a, 4b again, become gas once more, get back among compressor 1a, the 1b.By constantly carrying out this heat pump running, heating by the water in water-refrigerant heat exchanger 2.

In the running of above-mentioned heat pump, if improve the rotating speed of compressor 1a, 1b, and when increasing the cold-producing medium amount of restriction of decompressor 3a, 3b, the ability of heating just increases, but mechanical loss and heat loss increase, and running efficiency reduces.On the contrary, by reducing the rotating speed of compressor 1a, 1b, and reduce the cold-producing medium amount of restriction of decompressor 3a, 3b, then heating efficiency just reduces, but mechanical loss and heat loss also reduce, and running efficiency improves relatively.That is, can say so, when adding heat run by heat pump, heat with the lower temperature long period, then the efficiency of heating surface improves.

In hot water storage running step 73, with the above-mentioned heat pump running while, in the hot water storage loop, hot water supply mixing valve 12 is opened from water-refrigerant heat exchanger 2 one side direction hot water storing tanks 8 one sides, and close, thereby close hot-water switch valve 25 (step 73a) to hot water mixing valve's 13 1 sides.Have again, the running of beginning machine internal circulation pump 9, water circulates through machine internal circulation pump 9, heat exchange water quantity sensor 11, water-refrigerant heat exchanger 2, hot water supply mixing valve 12, hot water storing tank 8 successively from the outlet pass of hot water storing tank 8 bottoms.Like this, in water-refrigerant heat exchanger 2,, just be stored in gradually the hot water storing tank 8, when hot water storing tank 8 reaches the state of whole boilings from top through the hot water of heating, just be judged as hot water storage and finish (step 76), so just shut down (step 77).

In addition, whether suitable discharge hot water temperature judges (step 74) to the temperature of the heated hot water that judgement ejects from water- refrigerant heat exchanger 2,2e carries out by the heat exchange thermistor, when the temperature of discharging hot water is in setting, just continue the constant hot water storage running (step 75) of carrying out, and when beyond the setting, just control the rotating speed of compressor 1a, 1b, adjust the amount of restriction of decompressor 3a, 3b, regulate the temperature (step 74a) of discharging hot water by the rotating speed of controller internal circulation pump 9.

The judgement of the temperature of stored hot water and the store heat water yield, undertaken by above-mentioned holding vessel thermistor 8a～8d,, then be judged as hot water storage and finish if holding vessel thermistor 8a～8d all reaches in the set point of temperature, shut down, the holding vessel stored hot water finishes (step 77).

Fig. 4 is that Kitchen tap 16 is opened in expression, an embodiment of the flow chart of the course of work of the situation of the hot water that use is supplied.

When opening Kitchen tap 16 and bring into use hot water (step 80), operation controller 50 just starts compressor 1a, 1b, the running of beginning heat pump circuit 30, and, directly carry out the running (step 81) of hot-water supply by the hot water supply loop that comprises water supply pipe joint 5, pressure-reducing valve 6, water-supply quantity sensor 7, water supply check valve 10, heat exchange water quantity sensor 11, water-refrigerant heat exchanger 2, hot water supply mixing valve 12, hot water mixing valve 13, flow control valve 14, kitchen hot-water outlet pipe's joint 15, Kitchen tap 16.Simultaneously, carry out the running of holding vessel hot-water supply by the hot water supply loop that comprises water supply pipe joint 5, pressure-reducing valve 6, water-supply quantity sensor 7, hot water storing tank 8, hot water supply mixing valve 12, hot water mixing valve 13, flow control valve 14, kitchen hot-water outlet pipe's joint 15, Kitchen tap 16: (step 82).

At this moment, heat pump refrigerating agent loop 30 is sending among refrigerant side heat-transfer pipe 2a, the 2b of water-refrigerant heat exchanger 2 with the high temperature refrigerant of compressor 1a, 1b compression, after the water heating that flows into from water supply side heat- transfer pipe 2c, 2d, closing valve 12 1 effluents to the hot water supplying mixed again goes out, but, when the running beginning, the refrigerant temperature of sending in water-refrigerant heat exchanger 2 is lower, also do not reach enough high temperature and high pressures, and, because water-refrigerant heat exchanger 2 integral body still are cold, thereby with the heating efficiency deficiency of water heating.After after a while, cold-producing medium has reached a high temperature high pressure, and correspondingly, the heat that is given out by the cold-producing medium that is produced increases, and the heating efficiency of water is improved gradually.

In addition, up to the heating efficiency of the heat pump running stable status that reaches a high temperature, usually need about 5～6 minutes time, so, operation controller 50 after entry into service just in the stipulated time before the stable state that reaches a high temperature, the control of turning round makes the usual speed height of its rotating ratio to compressor, so that can be shortened to about 3～4 minutes the duration of runs that beginning water is heated to hot-water supply, but the stipulated time (4～5 minutes) after the entry into service just, carried out turning round (step 82) afterwards from the holding vessel hot water supply of hot water storing tank hot-water supply, operation controller 50 is just worked, stop holding vessel hot water supply running (step 84b), be converted to the only directly running of hot-water supply, proceed the running (step 85) of hot-water supply.

In the meantime, by means of hot water supply thermistor 14a, water-supply quantity sensor 7, temperature and flow to hot-water supply are judged, if surpass regulation, will regulate temperature and flow (step 84a), if within the limits prescribed, judge (step 84) just further carry out the temperature of direct hot-water supply.

In the determining step 84 of the direct temperature of hot-water supply, heating-up temperature in water-refrigerant heat exchanger 2 is inadequate, temperature at direct hot-water supply does not reach under the state of set point of temperature, just continue to regulate the temperature and the flow (step 84a) of heat pump running, (step 82) also carried out in the running of holding vessel hot-water supply simultaneously.In addition, if the heating-up temperature in water-refrigerant heat exchanger 2 is brought up to the temperature that reaches hot-water supply fully, when reaching the temperature of direct hot-water supply, just stop the running (step 84b) of holding vessel hot-water supply, carry out the running (step 81) of direct hot-water supply separately, continue hot-water supply (step 85).

Therefore, the effect of hot water storing tank, be to play a part auxiliary up to the temperature that reaches hot-water supply fully (being generally 40～42 ℃) incipient stage before in the heating efficiency that heat pump turns round, the ability in heat pump refrigerating agent loop 30 is big more, particularly the power output of compressor is big more, then can shorten the time of beginning, just can reduce hot water storing tank.

In addition, in order a mode to satisfy in lavation bath hydro-thermal water with direct hot-water supply, the requirement of using simultaneously to a plurality of places such as kitchen hot-water supplies, generally in the past all to be increased to the capacity of employed compressor 1a, 1b from about the power 5KW about 20KW more than four times, the compressor that not only needs development of new, the various novel parts in also essential development heat pump refrigerating agent loop 30, this is very difficult.Therefore, present embodiment has adopted has only double-circulating heat pump mode 30a, the 30b of the compressor about the compressor twice in the past, the existing technology of applying in a flexible way, just guaranteed substantial reliability, if the capacity of compressor is enough, even use single-cycle heat pump mode, the present invention also can use, and its effect is also constant.

Then, work as cutout cock, when finishing to use hot water (step 86), if stop the running of holding vessel hot-water supply, only carry out the running of direct hot-water supply, then stop the running of direct hot-water supply, if after just having used hot water, at the same time and under the situation with the running of holding vessel hot-water supply and the directly running of hot-water supply, then directly the running of hot-water supply and the running both of holding vessel hot-water supply stop (step 87).

And then, the running (step 87) of the running that has stopped the holding vessel hot-water supply at operation controller 50 and direct hot-water supply afterwards, must begin the running (step 88) of holding vessel stored hot water, detect the temperature and the hot water amount of stored hot water by holding vessel thermistor 8a～8d, finish (step 89) when being judged as stored hot water, and after in the scope of setting, just shut down, finish holding vessel stored hot water (step 90).

But, detect the state of holding vessel stored hot water by holding vessel thermistor 8a～8d, carry out through being everlasting, even because of the time compole that uses is lacked, after the running that has stopped water heating hot-water supply,, the temperature of remaining hot water and hot water amount are under the situation more than the setting in hot water storing tank 8, also be judged as stored hot water and finish, no longer carry out the running (step 88) of holding vessel stored hot water.

As mentioned above, in operation controller 50, owing to have in all runnings after running as target finishes, before finishing, stored hot water must carry out each function of all carrying out the stored hot water running of the running (step 88) of holding vessel stored hot water, so, in hot water storing tank 8, all stored the hot water of the set point of temperature more than the ormal weight all the time, thereby the hot water temperature is very low can eliminate firm entry into service the time, perhaps the hot water worry of interrupting in use.

Fig. 5 is the flow chart of expression by an embodiment of the filling hot water course of work of the automatic running of water for bathing.Press the water for bathing automatic button in advance, make its connection (step 91), when reaching the time of setting, just begin the running (step 92) that water for bathing is irritated hot water, open lavation bath water valve 17, just carry out water for bathing hot water supply (step 93).

Water for bathing hot water supply (step 93), the same with hot water use illustrated in fig. 4, also be to use the running of direct hot-water supply and the running of holding vessel hot-water supply simultaneously.Promptly, in heat pump turns round the time that has just begun 4～5 minutes, carry out the running of direct hot-water supply and the running of holding vessel hot-water supply simultaneously, when the temperature of direct hot-water supply reaches stable state, just stop the running of holding vessel hot-water supply, only carry out the running of direct hot-water supply.But, under the situation of the predetermined water for bathing hot-water supply of timer, can't help the holding vessel hot-water supply as far as possible, can only come independent hot-water supply with the heat pump running.

In addition, in the running of water for bathing hot-water supply, detect the temperature of water for bathing hot-water supply with water for bathing thermistor 18a, judge the temperature (step 94) of the hot water of being supplied, if beyond the set point of temperature scope, then temperature is regulated (step 94a),, then continue to supply the hot water (step 95) of the usefulness of having a bath if in prescribed limit.

Have again, detect the interior water level of bathing pool, judge the amount (step 96) of water for bathing filling hot water with level sensor 22a.

In the amount (step 96) of judging water for bathing filling hot water, if do not reach ormal weight, just continue as water for bathing hot-water supply (step 95), if reached ormal weight, then stop to finish the running (step 98) that water for bathing is irritated hot water for water for bathing hot-water supply and heat pump running (step 97).

Fig. 6 is the embodiment of expression by water for bathing automatic running the carrying out flow chart of water for bathing supplementary heating.

Press the water for bathing automatic button in advance, make its connection (step 100), when reaching setting-up time, just begin the running (step 101) that above-mentioned water for bathing illustrated in fig. 5 is irritated hot water, then, when water for bathing is irritated the running end of hot water (step 102), just begin water for bathing insulation running (step 103).

Water for bathing is irritated after running (step 102) end of hot water, detect the situation of irritating hot water with water for bathing thermistor 18a, during hot water temperature's (step 104) in judging bathing pool, if in the scope of judgment value, just continue water for bathing is incubated, and when being lower than setting, then carry out the supplementary heating running (step 105) of water for bathing.In addition, every official hour (for example, 10 minutes) all use level sensor 22a to detect the interior hot water amount of bathing pool, when being judged as the amount (step 106) of water for bathing filling hot water, if in setting, then continue water for bathing is incubated,, then carry out supply (step 107) of water for bathing hot water if when being lower than setting.

And then when having passed through the setting-up time of the automatic running of water for bathing, constipation bundle water for bathing insulation running (step 108) finishes the automatic running of water for bathing just (step 109).

Below, the thermal efficiency of above-mentioned water for bathing supplementary heating running (step 105) is described.

Fig. 7 represents the fluid of heated side of water for bathing heat exchanger 23 of heat-pump hot water supply apparatus shown in Figure 1 and the temperature difference of the water in the bathing pool, and the curve map of the relation between the efficiency of heating surface (COP).Temperature difference is more little, and the efficiency of heating surface is just high more, reaches peak when temperature difference is about 10K.

Fig. 8 is the figure that represents under the situation of repeatedly balneation.As an example, represented among the figure hot water is cooled to water in 30 ℃ the bathing pool, when roughly reaching 40 ℃ of suitable temperature by water for bathing supplementary heating running supplementary heating time of process, with the variation of temperature of the recirculated water of the fluid temperature (F.T.) of heated side and bathing pool side.

Lines Y among Fig. 8 represents the temperature of the recirculated water of bathing pool side, is 30 ℃ when being illustrated in supplementary heating and beginning, and heats big 40 ℃ situation when supplementary heating finishes.

Lines T represents the temperature of heated side fluid in the past, because stored hot water temperature is certain in the hot water storing tank, be approximately 65 ℃, thus with the temperature difference of bathing pool side circulating water temperature be 25K～35K, with the efficiency of heating surface is the highest among Fig. 7 value from quite far away.

Lines A represents an example of heated side fluid temperature (F.T.) of the present invention, because the temperature difference between heated side fluid temperature (F.T.) and the bathing pool side circulating water temperature, as the predetermined value (approximately 10K) that begins from supplementary heating to the efficiency of heating surface peak of supplementary heating end, so irrelevant with the time of supplementary heating, be suitable for the prepreerence situation of the efficiency of heating surface.

Lines B is that the bathing pool circulating water temperature is very low, during the beginning supplementary heating, heat with high temperature, along with process certain supplementary heating time, the curve that the temperature of heated side fluid slowly descends, though the efficiency of heating surface is lower than above-mentioned lines A,, can pay attention to the supplementary heating running of the time of supplementary heating than (lines T) height in the past.

Fig. 9 is considering from water saving, second day to the water for bathing supplementary heating after a example under the situation of balneation, when the running that its expression is carried out the water for bathing supplementary heating to the bathing pool water that is cooled to 20 ℃ reaches 40 ℃ of roughly suitable temperature supplementary heating time and the temperature of heated side fluid and the variation of bathing pool side circulating water temperature of process.Lines Y is identical with Fig. 8 with lines T, the temperature of expression bathing pool side recirculated water and the temperature of heated side fluid in the past.

Lines C is along with the time through one section supplementary heating, the curve that the temperature of heated side fluid rises gradually, because the temperature of bathing pool side recirculated water is low during the beginning supplementary heating, temperature difference during the beginning supplementary heating is very big, thereby it can both pay attention to the thermal efficiency, had also considered the supplementary heating running of the time of supplementary heating simultaneously.

Lines D is for the temperature control in the supplementary heating running being oversimplified, made the curve of the stepped variation of heated side fluid temperature (F.T.), and it can reduce the principal element of data discrete by means of the performance of the temperature of following the trail of thermistor.

Lines E is the mode that further advances lines D to be considered, make the temperature and the supplementary heating institute elapsed time of heating fluid side irrelevant, and be the curve of uniform temperature of the temperature that is lower than stored hot water, the temperature that it can carry out bathing pool side recirculated water is low more, temperature difference when supplementary heating begins is big more, and has considered a kind of fixing heat pump running of the time of supplementary heating.

In addition, though lines A～lines E in Fig. 8, Fig. 9, be illustrated respectively,, if do not consider the height of temperature of the recirculated water of bathing pool side when using, also can obtain same effect.

More than, has separately feature with the represented supplementary heating of lines A～lines E running, in these drive manners, can be combined in any several supplementary heating operation modes in the running control mode of heat pump, just can be according to the temperature of surplus hot water in the bathing pool, by selecting the pattern of above-mentioned water for bathing supplementary heating running, thus can be according to the length of surplus hot water's temperature and time, and season or the like, carry out suitable water for bathing supplementary heating.

Embodiment 2

Below, with reference to Figure 10 an alternative embodiment of the invention is described.

Figure 10 is that the heating efficiency of expression heat pump is very big, and the running of hot-water supply does not have hot water storing tank, can only use just can the meet the demands embodiment of this situation of direct hot-water supply.

The component structurals of heat pump refrigerating agent loop 30, hot water supply loop 40, operation controller 50 etc., all identical with embodiment 1 basically, difference is not have holding vessel and relative parts, and the water for bathing structure difference of heat exchanger 23.

In embodiment 1, when carrying out the running of hot-water supply, during entry into service just, holding vessel hot-water supply and direct hot-water supply have been used simultaneously, but, in present embodiment 2,, there are not hot water storing tank 8, machine internal circulation pump 9, heat exchange water quantity sensor 11 and hot water supply mixing valve 12 among Fig. 1 owing to only use direct hot-water supply.

In addition, in Figure 10, in a part of 30a in heat pump refrigerating agent loop, two cold-producing medium switch valves 28 have been used, and they are arranged between compressor 1a and the water-refrigerant heat exchanger 2, and be arranged on compressor 1a and water for bathing with on the heat exchanger, and it is controlled, make when the water for bathing supplementary heating, cold-producing medium is circulated with heat exchanger 23 1 sides to water for bathing; When running in addition, cold-producing medium is circulated to water-refrigerant heat exchanger 2 one sides; When the light water for bathing supplementary heating of heating load, because the heat pump refrigerating agent loop 30a that only turns round, and cold-producing medium is circulated to water-refrigerant heat exchanger 2 one sides, so thermal loss is few, help further improving the thermal efficiency.

In the heat pump structure of Figure 10, the effect of improving the water for bathing supplementary heating of the present invention does not change fully, by the temperature of heated side fluid being set to such an extent that the hot water temperature that stores than in the past holding vessel is low, and than the surplus hot water's who comes out to circulate in the bathing pool temperature height, thereby can reduce the possibility that high-temperature water refluxes, help improving the efficiency of heating surface.

As mentioned above, no matter the heated side fluid of water for bathing heat exchanger 23 is a hot water, or cold-producing medium, the present invention can both use, and whether no matter hot water storing tank 8 arranged, and also no matter the quantity in heat pump refrigerating agent loop 30 is one or a plurality of, the present invention can both use, and good effect is all arranged.

Heat-pump hot water supply apparatus with aforesaid structure particularly is provided with the compressor in formation heat pump refrigerating agent loop and the structure of evaporimeter, all collects in form shown in Figure 11～Figure 15 and the structure.Below, with reference to accompanying drawing these are illustrated.

Figure 11 is the heat-pump hot water supply apparatus of present embodiment 1,2, the front view after front panel is taken off.Figure 12 is the side view of Figure 11.Figure 13 is the vertical view of Figure 11.

Figure 14 is the enlarged drawing of the A portion of Figure 13.Figure 15 is used for the cold-producing medium heat-transfer pipe of formation water-refrigerant heat exchanger of Figure 12 and the amplification front elevation of water supply side heat-transfer pipe.Figure 16 is the key diagram of crushed element shown in Figure 15.Figure 17 is the key diagram of the explanation embodiment different with Figure 16.

In the accompanying drawing, heat-pump hot water supply apparatus main body 31 usefulness demarcation strips 37 are separated into left and right two spaces to the inside of box-shaped shell 31a, hold following various structure member in the space in left side: the compressor 1a, the 1b that constitute heat pump cycle; Evaporimeter 4a, 4b; Fan 34,35; And electric appliance box 35 etc.

On the other hand, in the space on demarcation strip 37 right sides, held following various structure member: water-refrigerant heat exchanger 2 of being arranged to spiral (coil) shape; Insert the interior columnar hot water storing tank 8 of coil inside of this water-refrigerant heat exchanger 2; Be positioned at the supplementary heating heat exchanger (not shown) in bight of the back side one side of rightward space; Be positioned at the electric appliance box 41 etc. of front one side of water-refrigerant heat exchanger 2.That is, demarcation strip 37 is that the air of evaporimeter 4a (4b) side and hot water storing tank 8 one sides is separated, and carries out adiabatic parts.The base plate 38 of box-shaped shell 31a bottom is arranged to frame on installed surface by leg 42.

In addition, demarcation strip 37 is in the back side of box-shaped shell 31a one side, puts with the mode Bend Qu Di Let around the interior Side of Hot water store tank 8.The sample even the horizontal Wide degree of box-shaped shell 31a is very narrow, also can Enough be guaranteed the diffusing Hot Mian Plot of necessity of evaporimeter 4a, 4b.In addition, the structure of water-refrigerant heat exchanger 2 is made and is made refrigerant side heat- transfer pipe 2a, 2b and water supply Side heat- transfer pipe 2c, 2d carry out heat transfer contact.

Compressor 1a, 1b and hot water storing tank 8 are fixed respectively and are bearing on the base plate 38.In addition, be provided with the upper space of evaporimeter 4a, 4b and fan 34 and be provided with the lower space of compressor 1a, 1b, separate with dividing plate 39.As shown in FIG., dividing plate 39 has been arranged to cover the top and front of compressor 1a, 1b.That is,, be separated out the compressor room 32 of compressor 1a, 1b by means of front and rear wall and the sidewall of base plate 6, dividing plate 39, demarcation strip 37, box-shaped shell 31a.Particularly, compressor 1a, 1b make has columnar shell, as shown in figure 11, the cylindrical shape axis of this shell is placed laterally, is arranged side by side before and after in box-shaped shell 31a.

Evaporimeter 4a, 4b are divided into upper and lower two sections, perhaps make the structure of two refrigerant loops with mutual mixed-arrangement.For example, evaporimeter 4a, 4b be the shape that the heat-transfer pipe that constitutes refrigerant loop is arranged to crawl, and makes many fins to be housed, so-called transverse fin tubular type heat exchanger on heat-transfer pipe.In addition, as shown in figure 11, evaporimeter 4a, 4b bend to the L font, have formed a greater part of of the side of box-shaped shell 31a and the back side, form the shell of heat-pump hot water supply apparatus 31.

In addition, fan 34 is installed on the installation leg 43 of evaporimeter 4a, 4b setting on above-below direction shown in Figure 11.Fan 34 sucks air from the outside of box-shaped shell 31a, and discharges to the front of hot-water supply device main body 31, so that forcibly make the low temperature in evaporimeter 4a, the 4b, the cold-producing medium evaporation of low pressure.

Above the electric appliance box 35 formation box-shaped shell 31a, in electric appliance box 35, held the control circuit of control compressor 1a, 1b and fan 34 runnings.In addition, second electric appliance box 41 is arranged in the front of box-shaped shell 31a, in electric appliance box 41, held the control circuit of the straighforward operation of setting heat-pump hot water supply apparatus 31 etc. and by means of the detected value of each sensor, made control circuit that the loop of heat pump for supplying hot water shuts down etc.

In addition, water-refrigerant heat exchanger 2 is made refrigerant side heat-transfer pipe 2a, a 2b and water supply side heat- transfer pipe 2c, 2d, shown in the image pattern like that, be wound on the excircle of hot water storing tank 8.For example, make refrigerant side heat-transfer pipe 2a, a 2b and alternately be wound into coiled type overlappingly, again water supply side heat- transfer pipe 2c, 2d are wound on these laps, combine securely by modes such as solderings and also can conduct heat.In addition, the end of the top of refrigerant side heat- transfer pipe 2a, 2b is connected the discharge side of compressor 1a, 1b by pipeline, and the end of below then by pipeline, expansion valve, pipeline, is connected on the end of evaporimeter 4a, 4b.In addition, the other end of evaporimeter 4a, 4b is connected the suction side of compressor 1a, 1b by pipeline.

Below, with reference to Figure 14, illustrate with above-mentioned water-refrigerant heat exchanger 2 and heat, be stored in the detection of the hot water temperature's (heat) in the hot water storing tank 8.

To the parts that the hot water that is stored in the hot water storing tank 8 manages, be temperature sensor, holding vessel thermistor for example.This holding vessel thermistor 8a, 8b, 8c are installed on the upper, middle and lower surface location of hot water storing tank 8.And upper and lower holding vessel thermistor 8a, 8c are mounted to towards the space that is not wound with water-refrigerant heat exchanger 2.

In addition, though the surface of hot water storing tank 8 covers with heat-insulating material 44, have window at the position that above-mentioned holding vessel thermistor 8a, 8c have been installed.The locational heat-insulating material of holding vessel thermistor 8a, 8c directly is installed on hot water storing tank 8 surfaces, is had opening portion.In addition, holding vessel thermistor 8b is installed in the middle body of vertical hot water storing tank 8.

At the middle body of hot water storing tank 8, certainly, water-refrigerant heat exchanger 2 is provided with from the teeth outwards across heat-insulating material 44.Crushed element 46 is arranged on the central authorities of water-refrigerant heat exchanger 2 basically.

Above-mentioned crushed element 46 has following shape, that is, the local expansion of the coiling pitch of the heat-transfer pipe 2a, the 2b that constitute water-refrigerant heat exchanger, 2c, 2d, and further the part increases its winding diameter, and with respect to protruding from other parts.

As shown in the figure, its structure can be made the shape of general triangular, and utilizes this triangle that finger is stretched into the face side of hot water storing tank 8, temperature sensor is installed on the surface of hot water storing tank 8.

On the heat-insulating material 44 corresponding, be provided with window 45 with above-mentioned crushed element 46, when will be when being positioned at heat-insulating cover 44b on the window 45 and unloading down from crushed element 46, can put in finger, 8b is installed on the hot water storing tank 8 the holding vessel thermistor, perhaps disassembles from it.Certainly, except the activity duration, window 45 usefulness heat-insulating cover 44b cover.

The above-mentioned crushed element 46 that local expansion of the refrigerant side heat-transfer pipe that carries out heat transfer contact and water supply side heat-transfer pipe made is towards the bight of the rectangular case of the shell that constitutes hot-water supply device main body 31.In other words, crushed element 46 can be described as on the position of the idle space that is in hot-water supply device main body 31.

Also have, as shown in figure 15, because the shape that water-refrigerant heat exchanger 2 has is across heat-insulating material 44, be wound up into the shape of bottom from the top of hot water storing tank 8 always, so, no matter be refrigerant side heat- transfer pipe 2a, 2b, or water supply side heat- transfer pipe 2c, 2d are very long.

Therefore, this coiling operation is very huge operation, also is the operation of weight weight very certainly, is the operation that is difficult to manually carrying out.

For this reason, can be divided into upper and lower two parts to water-refrigerant heat exchanger 2, they be coupled together with aforesaid crushed element 46.This structure, not only solved the water-refrigerant heat exchanger 2 that originally constituted by very long heat-transfer pipe, the problem of preponderance before the device assembling, and, owing to the heat-transfer pipe of two water-refrigerant heat exchanger 2 is welded together, can not produce heat affecting to hot water storing tank 8, heat-insulating material 44 etc.

Keep pipe 47 at interval not have length around hot water storing tank 8 the place ahead circumference, but, for example, only have the pipe of the length of half circumference or 2/3 circumference.

On the position that the coiling pitch of the substantial middle of water-refrigerant heat exchanger 2 of being arranged in this root pipe 47 strengthens, it arranges that the position that can not cause water-refrigerant heat exchanger 2 offsets.

In other words, on the position of this root pipe 47 of packing into, be provided with crushed element 46.That is,, lack half or 1/3 part but make because this root pipe 47 does not have length on the whole circumference of being wound on.Therefore, just can on the part that does not have pipe 47, arrange the crushed element 46 of pipe.

Like this, finger is put in hot water storing tank 8 one sides from crushed element 46, just can installation or removal holding vessel sensor 8b.Certainly, to disassemble the heat-insulating cover 44b in the window 45 in advance this moment.

Then, in Figure 16,17, heat exchanger tube 48 is pipes that refrigerant side heat-transfer pipe and water supply side heat-transfer pipe are made of one.Pipe shown in Figure 16 in order to make crushed element 46, as shown in the figure, protrudes the part of two sections pipes 48 laterally, makes crushed element 46.

In this case, just do not needed previous maintenance pipe 47 at interval.And, can put in finger from the opening of making the size L1 shown in the arrow P 1, (holding vessel sensor 8b) is installed on the hot water storing tank 8 temperature sensor.

Size L1 should be chosen as the size that is easy to mount and dismount the said temperature sensor.

Figure 17 represents to enlarge the coiling pitch of pipe 48 is local, and, the crushed element 46 that the part of pipe 48 is protruded laterally.

In Figure 17, the maintenance pipe 47 at interval that illustrates previously must be arranged.This root keeps the diameter and the length of pipe 47 at interval, can be according to the size variation of size L1.The installation and removal of the temperature sensor of Figure 17 (holding vessel sensor 8b) on holding vessel 8, the same with Figure 16, also be to be undertaken by the direction of arrow P with the state that heat-insulating cover 44b is taken off.Certainly, size L1's is selected also the same with Figure 16.

Structure certainly, except easy assembling, is carried out outside the maintenance overhaul of holding vessel sensor 8a, 8b, 8c easily as described above, can also correctly confirm remaining hot water amount in the hot water storing tank 8, sends correct running indication.

That is, top holding vessel sensor 8a the hot water in detecting hot water storing tank 8 interrupts, can also judge whether the temperature in the hot water storing tank is suitable.

Intermediate storage jar sensor 8b is used to detect the water level of surplus hot water in the hot water storing tank 8, and judges whether its temperature is suitable.In other words, the trigger that can be used as boiling uses.

Bottom holding vessel sensor 8c is used for judging whether boiling finishes, and judges whether the hot water temperature of holding vessel bottom is suitable.

In having the hot-water supply device main body 31 of this structure, for example, under the situation of beginning stored hot water running, in heat pump running shown in Figure 1, in the hot water storage loop, hot water supply mixing valve 12 is opened hot water storing tank 8 one sides from water-refrigerant heat exchanger 2 sides, closes hot water mixing valve's 13 1 sides, and closes hot-water switch valve 25.Then, the running of beginning machine internal circulation pump 9, water just circulate through following each parts from the outlet pass of hot water storing tank 8 bottoms: machine internal circulation pump 9, heat exchange water quantity sensor 11, water-refrigerant heat exchanger 2, hot water supply mixing valve 12, hot water storing tank 8.Like this, the hot water that is heated by water-refrigerant heat exchanger 2 just is stored in the holding vessel 8 gradually from the top of hot water storing tank 8, when whole hot water storing tank 8 all reaches fluidized state, judges that just hot water storage finishes, and shuts down.At this moment, above-mentioned holding vessel sensor 8a, 8b, 8c just play above-described effect respectively.

Because present embodiment has aforesaid structure, thereby can obtain following effect.

Promptly, in a kind of heat-pump hot water supply apparatus, make the refrigerant side heat-transfer pipe and the water supply side heat-transfer pipe of the water-refrigerant heat exchanger that constitutes heat pump cycle carry out heat transfer contact, water-refrigerant heat exchanger heated hot water of utilizing helically to be wound on the excircle of cylindrical shape hot water storing tank is stored in the above-mentioned hot water storing tank, and, detect stored hot water amount with being installed in the lip-deep temperature sensor of hot water storing tank, wherein, owing to be wound on above-mentioned spiral helicine refrigerant side heat-transfer pipe and the water supply side heat-transfer pipe, be provided with the local coiling crushed element that enlarges laterally of the distance of leaving hot water storing tank, utilize this coiling crushed element, just can be installed in temperature sensor on the surface of hot water storing tank from the outside, so, just can correctly measure the hot water storing tank of the two tubes of having reeled, for example, the central portion temperature of grading.In addition, when when maintenance waits, changing above-mentioned temperature sensor, also be easy to change.

In addition, since with the heat-insulating material at the corresponding position of coiling crushed element of refrigerant side heat-transfer pipe and water supply side heat-transfer pipe on have window, can be installed in temperature sensor on the surface of hot water storing tank by this window with freely loading and unloading, so, even on the surface of hot water storing tank, covered heat-insulating material, also can cross the surface temperature that this heat-insulating material is measured hot water storing tank.

In addition, since with etc. the space of the crushed element made after being wound into that spiral helicine refrigerant side heat-transfer pipe and water supply side heat-transfer pipe are local and enlarging of pitch, make and to load and unload the space that is installed in the lip-deep temperature sensor of hot water storing tank at an easy rate, so, when when assembling or maintenance, the operator can use by enlarging original pitch and allowing the space that pipe deformation caused, the hand loading and unloading temperature sensor of usefulness oneself at an easy rate.

In addition, owing to handle carries out the refrigerant side heat-transfer pipe of heat transfer contact and the position that water supply side heat-transfer pipe part enlarges the crushed element that forms laterally, the bight that just in time faces toward the rectangular case of the outline that constitutes the hot-water supply device main body, so the profile that needn't enlarge hot-water supply device just can be held crushed element.

In addition, because between the enlarged of the coiling pitch of the water-refrigerant heat exchanger that constitutes by refrigerant side heat-transfer pipe that carries out heat transfer contact and water supply side heat-transfer pipe, injected the interval holding tube that keeps this expansion size, be wound on the two tubes on the vertical hot water storing tank, can not dwindle enlarged because of the weight that be had own, so crushed element can keep certain shape all the time, can carry out the loading and unloading of temperature sensor at an easy rate by this crushed element.

In addition, when on the hot water storing tank that a plurality of temperature sensors is installed in vertical configuration, because upper and lower temperature sensor is installed on the position of do not reel refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, coiling pitch that middle temperature sensor then is installed in above-mentioned two kinds of pipes has enlarged, and make on the local crushed element that enlarges of above-mentioned pipe, so, can correctly measure hot water amount's (heat) of hot water storing tank, when adopting running automatically to wait, the hot water amount that can in hot water storing tank, guarantee to have regulation all the time.

In addition, owing to make the refrigerant side heat-transfer pipe of two groups of heat pump cycles and water supply side heat-transfer pipe carry out heat exchange contact, and be wound on across heat-insulating material on the excircle of hot water storing tank, so, except the miniaturization that helps hot water storing tank, can also make the temperature of the pipe of water supply side heat-transfer pipe rise to the temperature of regulation at short notice.

In addition, owing to will be wound on water-to-water heat exchanger on the hot water storing tank in advance by first, second water-to-water heat exchanger constitutes, and, these two first, the local coiling crushed element that enlarges of the distance of leaving hot water storing tank is made in the coupling part of second water-to-water heat exchanger, so, in order when connecting between the pipe of water-refrigerant heat exchanger, to use tube connector, though the diameter of the two kinds of pipes in front and back is different, but, by the excircle of the different part of this caliber from the hot water storing tank of reeling enlarged laterally, just can allow other parts be wound into identical pitch and identical diameter.

In addition, because holding vessel is left in welding, can carry out at an easy rate, thereby can not use very long pipe.Thereby also improved productivity ratio.

Claims (8)

1. heat-pump hot water supply apparatus, water-the refrigerant heat exchanger of its heat pump cycle is arranged to the refrigerant side heat-transfer pipe and is carried out contacting of heat with the water supply side heat-transfer pipe, and be arranged on the excircle of cylindrical shape hot water storing tank, to have spiral helicine shape, to utilize water-refrigerant heat exchanger heated hot water to be stored in the above-mentioned hot water storing tank, and utilization is installed in the lip-deep temperature sensor of hot water storing tank and detects stored hot water amount, it is characterized in that, on above-mentioned spiral helicine refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, be provided with certain distance and the local coiling crushed element that enlarges laterally that leaves above-mentioned hot water storing tank, utilize this coiling crushed element, can be installed in the said temperature sensor on the surface of above-mentioned hot water storing tank from the outside.

2. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that, on the heat-insulating material at the position corresponding, window is set with the coiling crushed element of refrigerant side heat-transfer pipe and water supply side heat-transfer pipe, from this window on the surface of hot water storing tank, be provided with temperature sensor.

3. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that, with etc. pitch be wound into the space of the local above-mentioned crushed element that enlarges of spiral helicine above-mentioned refrigerant side heat-transfer pipe and above-mentioned water supply side heat-transfer pipe, be installed in the lip-deep temperature sensor of the above-mentioned hot water storing tank space of loading and unloading easily as making.

4. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that above-mentioned refrigerant side heat-transfer pipe is relative with the bight of the rectangular case of the outline that constitutes the hot-water supply device main body with the position of the above-mentioned crushed element that above-mentioned water supply side heat-transfer pipe part enlarges laterally.

5. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that, between coiling pitch enlarged, accompany the interval holding tube that keeps this expansion size by the coiling crushed element of above-mentioned refrigerant side heat-transfer pipe and the formed above-mentioned water-refrigerant heat exchanger of above-mentioned water supply side heat-transfer pipe.

6. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that, on the hot water storing tank of vertical configuration, be provided with a plurality of temperature sensors, upper and lower temperature sensor is arranged on the part that is not wound with above-mentioned refrigerant side heat-transfer pipe and above-mentioned water supply side heat-transfer pipe, the coiling pitch that middle temperature sensor is arranged on above-mentioned two kinds of heat-transfer pipes enlarges, and makes on the local crushed element that enlarges of above-mentioned heat-transfer pipe.

7. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that, make the refrigerant side heat-transfer pipe of two groups of heat pump cycles carry out contacting of heat exchange, and across heat-insulating material they are arranged on the excircle part of above-mentioned hot water storing tank with the water supply side heat-transfer pipe.

8. heat-pump hot water supply apparatus as claimed in claim 1, it is characterized in that, be wound on the above-mentioned water-refrigerant heat exchanger on the above-mentioned hot water storing tank, constitute by first, second water-to-water heat exchanger in advance, and the coiling crushed element of the coupling part of this first, second water-to-water heat exchanger as the local expansion of distance of leaving above-mentioned hot water storing tank.

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