JPS60133262A - Hot water supplying device - Google Patents

Abstract

PURPOSE:To make the most of solar heat and obtain a sufficient tapped hot water temperature, by providing a hot water storing tank provided with a heat-exchanging part, a heat-collecting circulating passage, and a heat pump provided with an evaporator with a circulating liquid as a heat source for absorbing heat from the circulating liquid present at a lower part of the heat-exchanging part and a condenser for releasing heat to the circulating liquid present at an upper part of the heat-exchanging part. CONSTITUTION:When the sunshine is strong or when the temperature of hot water in the hot water storing tank is so high that it is not necessary to take a large amount of heat, only the heat-collecting circulating passage 3 is operated to supply hot water at a low running cost. On the other hand, when it is necessary to take a large amount of heat, both the passage 3 and the heat pump 12 are used, whereby a larger amount of heat can be taken, and high-temperature hot water can be supplied. The heat pump 12 is provided with an evaporator 15 with air as a heat source which is connected in series with the evaporator 8 with the circulating liquid as a heat source. Even in the days of weak sunshine or bad weather, hot water in an amount sufficient for hot water supply can be obtained at an upper part of the tank, by utilizing air as a heat source in combination with the use of the circulating liquid as a heat source.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a water heater that can provide sufficient hot water humidity.

[Background technology]

Generally speaking, petroleum is the most common method of heating water in homes.

Water heaters that use gas or electricity as an energy source have been around for a long time, but in recent years, with the increasing awareness of energy conservation, water heaters that use solar heat and heat pump water heaters that efficiently use electricity have been developed.

In the much-talked-about system that uses solar heat, the temperature inside the hot water tank does not rise sufficiently on days with weak sunlight or in winter when the water supply temperature is low, and other heating devices such as oil boilers are used as an auxiliary heat source. There was a necessity.

On the other hand, heat pump water heaters use the atmosphere as their heat source, so they are not affected by solar radiation, but they are less efficient on cold days, and when the temperature is below 5 degrees Celsius, frost can form on the evaporator. It becomes unusable.

Especially in winter, the water supply temperature is low and the temperature inside the hot water storage tank does not rise, so it is necessary to install a heater built into the hot water storage tank or use the auxiliary heat A mentioned above.
On the other hand, in the summer, the atmospheric temperature is high and the water supply temperature is high, so the water boils quickly (for example, during the life of the person).
There was a reported problem that heat pumps were often not operated at around 2:00 pm, when the temperature was at its highest.

[Purpose of the invention]

The entire purpose of the present invention is to provide a water heater that can obtain sufficient hot water humidity by making maximum use of solar heat.

[Disclosure of the invention]

The hot water supply device of the present invention includes a heat exchange section including a gold film girder hot water storage tank, a heat collection circuit through which circulating fluid circulates between the heat exchange section and the solar heat collector, and a heat collection circuit in which a circulating fluid is circulated between the heat exchange section and the solar heat collector. It is equipped with a circulating fluid heat source evaporator that absorbs heat and a human pump that has a condenser that radiates heat to the upper circulating fluid.

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 1A, 1 is a hot water storage tank, and a jacket 2 is provided on the outer peripheral surface of this hot water storage tank 1 as a heat exchange section. A circulating fluid (heat #- such as water, for example) is accommodated in the jacket 2, and a heat collecting circuit 3.
An evaporator circuit 4 and a condenser circuit 5 are connected.

The heat collection circulation path 3 uses a circulation pump 6 through a heat collector outgoing pipe 3 connected to the lower part of the jacket 2 to forcibly send the circulating fluid to a solar heat collector 7, which collects solar heat and becomes high temperature. The circulating fluid returns to the jacket 2 through the collector return pipe 3b and gives heat to the water in the v1 hot water storage tank 1. Heat collector return pipe 3
b is attached near the center of the jacket 2.

The evaporator circuit 4 and the condenser circuit 5 are provided at the bottom and top of the jacket 2, respectively. Each circulation path 4
．． The evaporator 8 and condenser 9 provided in the evaporator 5 are connected by a heat pump 12 including a compressor 10 and an expansion valve 11, and the evaporator 8 absorbs heat from the circulating water at the bottom of the jacket 2 that circulates in the evaporator circuit 4. Then, all of the heat is released in the upper condenser 9 to provide heat to the circulating water.

When the heat pump 12 is in operation, the circulating fluid in the jacket 2 passes through the circulation bonders 13 and 14 of each circulation path 4 and 5, exchanges heat with the evaporator 8 and the condenser 9, and returns to the jacket 2. Transfers heat to and from the water in the hot water tank 1. On the other hand, a part of the circulating fluid returned from the heat collector 7 enters the evaporator circulation path 4 while imparting heat to 1 yen of water in the hot water storage tank in the jacket 2.

In this way, the heat collection circuit 3 and the heat pump 12 are each attached to the jacket 2 of the hot water storage [1], so that on days with strong sunlight, the 4J warm and high heat in the hot water storage tank can be collected in layers that require a large amount of heat. To obtain hot water at low running cost by operating only the heat collection circuit 3. On the other hand, on days when a large amount of heat extraction is required, by using both the heat collection circuit 3 and the heat pump 12 in combination, more heat can be extracted and hot water at the same temperature can be obtained. That is, the heat pump pumps the heat from the lower part of the hot water storage tank 1 and the salmon/soto 2 to the L part, and as a result, the humidity of the circulating fluid entering the heat collector 7 becomes lower, so more heat is absorbed in the heat collector 7. is given.

In particular, if antifreeze is used as the circulating fluid, low-humidity heat collection at temperatures below 0°C is possible.

Further, the heat pump 12 is provided with an air heat source evaporator 15' in series (or in parallel) with the circulating liquid heat source evaporator 8, as shown in diagram Pα1. 16 is a fan. For this reason,
Even on days with weak sunlight or bad weather, can you use the air heat source in combination with the circulating fluid heat source? In particular, there is enough hot water in the upper part of the hot water storage tank for hot water supply.

The heat collecting circuit 3 is an outgoing pipe 3a to the heat collector 7 as described above.
is provided at the lower part of the jacket 2, and a return pipe 3b is provided near the center of the jacket 2. It is provided at approximately the same height as the pipe 3b. Due to this piping relationship, temperature stratification occurs between the upper and lower parts of the hot water storage tank 1, with the upper part being higher in temperature and the lower part being lower in temperature. Therefore, the temperature stratification position is close to the return pipe 3b of the heat collecting circuit 3 and the evaporator circuit outgoing pipe 4a, so it is possible to set each of the high temperature layer and the low temperature layer depending on this height position. can.

The heat collection circuit 3. The connections of the evaporator circuit 4 and the condenser circuit 5 to the jacket 2 are shown in FIG. Ru.

(1) Each of the outgoing pipes 3g, 4g, 53 and the return pipe 3b,
4b and 5b are provided at facing positions farthest from each other as shown in the figure.

(2) Also, as shown in the same figure (Al), the collector return pipe 3b, the evaporator outgoing pipe 4a, the condenser outgoing pipe 5a, and the T-jacket 20 can be installed at positions 120° apart in the circumferential direction. .

(3) As shown in FIG. The evaporator circulation path 4 and the condenser circulation path 5 are less susceptible to mutual influence, and temperature stratification is more likely to occur in the hot water storage 1411. Also, each circulation path 3, 4° 51c can be operated efficiently. Become.

Furthermore, as shown in FIG. 1, the heat collector return pipe 3bK is
A three-way switching valve 17 is provided to allow circulating fluid to be switched to the upper and central portions of the jacket 2. jacket 2
The return pipe 3'b connected to the upper part is located on the same vertical line as the return pipe 3b near the center, as shown in FIG. 2 (C1).

The upper heat collector return pipe 3/b is used when solar radiation is strong and heat is collected only through the heat collection circuit 3. As a result, the circulating fluid flows smoothly within the jacket 2, and the heat exchange area between the hot water tank 1 and the jacket 2 increases. If the circulating fluid is placed near the center of the jacket 2, the high temperature circulating fluid will rise to the top of the jacket 2 by convection and exchange heat.
It becomes low humidity and descends. On the other hand, when the heat pump 12 is operated, high-temperature circulating water is returned to the vicinity of the center of the jacket 2. In this manner, heat exchange between the hot water tank and the jacket can be performed efficiently depending on the heat collection temperature of the heat collecting bed circulation path 3 and the operating state of the heat pump 12.

In addition, in order to prevent the temperature stratification from being disturbed by convection in the hot water storage tank 1FF3 and the humidity in the upper high temperature layer to decrease when hot water is supplied from the hot water pipe 18 at the bottom of the hot water storage tank 1 or when water is supplied to the hot water storage tank l, the above-mentioned steps are taken. The water supply port of the water supply pipe 19 to the hot water storage tank 1 is provided at approximately the same height as the connection between the lower part of the hot water storage tank 1 and the evaporator outgoing pipe 4a, and a switching three-way valve 2o is installed depending on the temperature of the water supply and the temperature of the water at the lower part of the hot water storage tank.
Switch the water supply height by . For example, when the water supply temperature is lower than the hot water temperature at the lower part of the hot water storage tank, water is supplied from the bottom of the hot water storage tank, and when the water supply temperature is higher than the hot water temperature at the lower part of the hot water storage tank, water is supplied from the center of the hot water storage tank. If this is reversed, turbulence will occur within the hot water storage tank. Therefore, convection within the hot water storage IiI can be prevented during hot water supply (water supply), so that temperature stratification is not disturbed and high temperature hot water can be stably supplied.

In addition, in FIG. 1, 22 is an electrolytic corrosion rod, 23 is a circulating fluid expansion tank, 24 is a hot water supply safety valve, and 25 is a mixing valve.

Other embodiments of the invention are shown in FIGS.
-Refer to and explain. That is, this hot water supply apparatus includes a jacket 2' provided on the outer peripheral surface of a hot water storage tank 1', and a partition wall 21 ft along the height direction, and a heat collection circulation path 3. The evaporator circuit 4 and the condenser circuit 5 are connected to the jacket 2' as follows.

(11 each outgoing pipe 3a, 4a, 5a and return pipe 3b,
4b and 5b are separated via a partition wall 21.

(2) The collector outgoing pipe 3a is installed at the bottom of the jacket 2, and the old return pipe 3b is installed near the center of the jacket 2.

(3) The evaporator outgoing pipe 4a is located at approximately the same height as the collector return pipe 3b on both sides thereof with the partition wall 21t interposed therebetween. The evaporator return pipe 4b is attached to the lower part of the jacket 2' adjacent to the collector outgoing pipe 3a via the partition wall 21.

(4) The condenser outgoing pipe 5a is installed at a higher position and on the same side as the evaporator outgoing pipe 4a, and the return pipe 5b is installed above the jacket 2'.

Therefore, the circulation paths 3, 4.5 are less susceptible to mutual influence, and temperature stratification is more likely to occur. Furthermore, since the connections of each piping can be concentrated, manufacturing, construction, and maintenance are easier. The rest is the same as the previous embodiment.

〔Effect of the invention〕

According to this invention, on days when a large amount of heat extraction is not required,
Hot water can be obtained at low running costs by operating only the solar heat collection circuit, and on days when a large amount of heat extraction is required, it is possible to obtain more solar heat by using a heat pump (lJf). Obtaining sufficient hot water temperature has a great effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG.
1 and (0 are respectively a plan view, a front view and a rear view of a hot water storage tank, and FIGS. 3A and 3B are a plan view and a front view of a hot water tank in another embodiment of the present invention. Hot water storage tank, 2...Shake-1 (heat exchange part),
3... Heat collection circuit, 4... Evaporator circulation path, 5...
Condenser circulation path, 7...Solar heat collector, 8...Evaporator, 9...Condenser, 12...Heatbonde procedure amendment (November 2, 1981, Nawate 058 patent application) No. 241142 No. 2, Name of the invention Water heater 3, Person making the amendment Relationship to the case Applicant 4, Agent 5, Date of amendment order Voluntary amendment 6, Subject of amendment (1) Specification, page 6, line 14 And on page 6, line 16, "circulating water" is corrected to "circulating fluid." (2) On page 10, line 11 of the specification, "heat collection bed circulation path" is replaced with "heat collection circulation path." (3) On page 10, line 16 of the specification, “or” should be replaced with “
In other words,” he corrected. (4) On page 12, line 18 of the specification, the phrase “on day” is c.
"On days with strong sunlight or sunlight," he corrected. (5) On page 12, line 20 of the specification, the phrase "on the specified day" is corrected to "on the specified day or on a day when sufficient solar radiation is not obtained." (6) Figure 1 of the drawings is supplemented as shown in the attached sheet.

Claims (1)

[Scope of claims] A water heater comprising a circulating fluid heat source evaporator that absorbs heat from the upper circulating fluid and a heat pump having a condenser that radiates heat to the upper circulating fluid. (2) The heat exchange section is a jacket provided on the outer peripheral surface of the hot water storage tank, and Claim fi1, wherein the heat collection circuit connects an outgoing pipe to a solar heat collector to a lower part of the jacket, and a return pipe from the solar heat collector to a position near the center of the jacket. A hot water supply system according to claim (2), wherein a switching valve is attached to the return pipe of the heat collection circulation path, and the circulating fluid is returned to the upper part of the jacket. (4) The lower circulating fluid is circulated to the evaporator through 11 evaporator circuits provided in the jacket, and the upper circulating liquid is circulated to the condenser through a condenser circuit provided in the jacket. (The water heater according to paragraph 21 or paragraph (3). (5) The outgoing pipe to the evaporator of the evaporator circulation path is approximately the same height as the return pipe from the solar heat collector of the ITJ heat collection circuit. Claim No. (1) connected to the jacket at
Section. The hot water supply device according to item (2), item (3), or item (4). (6) The connection of the heat collection circuit, the evaporator circuit, and the condenser circuit to the jacket is such that the respective outgoing pipes and return pipes are in opposing positions, and the return pipes of the heat collecting circuit are connected to the evaporator pipes. Claim No. 11, wherein the condenser outgoing pipe and the condenser outgoing pipe are located 120° apart from each other, and the condenser outgoing pipe is provided at a higher position than the return pipe and the evaporator outgoing pipe in the heat collecting circuit. Section, Section (
The water heater according to item 2), item (3), item (41) or item (5). (7) The jacket has a partition wall provided over the entire length along the height direction thereof, The connection of the heat collection circuit, the evaporator circuit, and the condenser circuit to the jacket connects the respective outgoing pipes and return pipes at positions close to each other via partitions in the circumferential direction. At the same time, the evaporator outgoing pipe and the solar heat collection circuit return pipe are connected to both sides of the partition wall at approximately the same height, and the evaporator circulation path and the heat collecting circuit outgoing pipe are connected to the jacket through the partition wall. Claims (1) and (21) are connected to both sides of the lower part, and furthermore, the condenser outgoing pipe is connected to the same side of the elevated position as the evaporator outgoing pipe, and the return pipe is connected to the upper part of the jacket. , (3), and (41 or cylindrical portion). The hot water supply system according to item 1). The water heater according to claim (1), which is made variable.