JP2002089883A - Cooling and drying apparatus in which hot-water supply unit is used - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling and drying apparatus in which heat of evaporation of CO2 in a CO2-water-supply unit is used. SOLUTION: A unit U is composed of a water-heater, a refrigerator employing CO2 as a heating medium and air supply equipment, and the unit U is installed adjacently to the outside of a building 4. First, second, and third ducts 5, 6, and 7 respectively are connected to an air tank 3a of the unit U. The duct 5 is provided to a toilet T, the second duct to a lavatory (combined with a dressing room) S, and the third duct to a bathroom R. Outlets 5a, 6a, and 7a are attached to respective tip ends of the ducts. Thus, cool air can be supplied to the toilet T and the lavatory S to cool them simply, and the cool air is supplied also to the bathroom R to attain a rapid drying, and washings hanged in the bathroom R can be dried even in a rainy day.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device and a cool air drying device using a hot water supply unit.

[0002]

2. Description of the Related Art Generally, a hot water supply unit attached to a house is for supplying hot water to a kitchen, a washroom, a bathroom, or the like around a water supply. Hot water supply units usually heat city water supplied to houses using gas or electricity as a heat source,
A type in which heating is performed using a refrigerator using CO ₂ as a heat medium is also known. The hot water supply unit using CO ₂ is configured to raise the temperature of the water supplied to the water heater with heat radiation obtained from the compressed high temperature CO ₂ .

[0003]

By the way, the CO ₂
With the refrigerator to the heat medium, an evaporator in the circulation circuit of the CO ₂ is disposed, a CO ₂ that is radiated by the radiator evaporated after vacuum, the CO ₂ which was the gas in the compressor After being compressed, it is sent to a radiator, that is, liquefaction and vaporization are repeatedly performed. As described above, the heat generated by the compression of CO ₂ is used to heat water, but the heat of evaporation (cold heat) generated by the evaporation of CO ₂ is conventionally not used and wasted.

Accordingly, the present invention has been made to effectively utilize the heat of evaporation (cold heat) of CO ₂ in a CO ₂ hot water supply unit. An object of the present invention is to provide a cooling and drying device using a hot water supply unit, which supplies a toilet, a washroom, a dressing room, a bathroom, and the like to perform simple cooling and cool-air drying.

[0005]

As means for achieving the above object, the present invention provides a combination of a water heater, a refrigerator having a refrigeration cycle using CO ₂ as a heat medium, and an air supply device. As a result, the temperature of the water supplied to the water heater is increased by the heat radiation of the compressed CO ₂ , the air supplied to the air heater is cooled by the heat of evaporation of the CO ₂ , and the cooled cold air is passed through the duct. The gist is a cooling and drying device that uses a hot water supply unit to supply the building. Further, in the cooling and drying apparatus using the hot water supply unit, cool air is supplied to a bathroom or a washroom / dressing room in the building via the duct, and cool air is supplied to a toilet in the building via the duct. That is the gist.

[0006] In the present invention, the evaporative heat conventionally discarded by a CO ₂ water heater is used as a cooling source for air, and the cooled air is ducted to a toilet, a washroom, a dressing room, a bathroom, etc. of a building. These can be simply cooled and dried by supplying them through the

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a cooling and drying apparatus using a hot water supply unit according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of a unit U used in the present invention, and is configured by combining a water heater 1, a refrigerator 2 using CO ₂ as a heat medium, and an air supply device 3.

The water heater 1 has a tank 1a. City water is supplied to the bottom of the tank 1a via a valve 1b. Hot water is supplied from the top of the tank 1a to a pressure regulating valve 1c.
Is taken out through. Further, a bypass 1d connecting the lower end and the upper end of the tank 1a is provided, and the bypass 1d is provided with a pump 1e.

The refrigerator 2 forms a refrigeration cycle using CO ₂ as a heat medium, and the CO ₂ is supplied to the compressor 2a.
Circulates the refrigeration cycle, a radiator 2b and an evaporator 2c are provided in the middle of the refrigeration cycle, and a throttle valve 2d is provided at a key point.

The air supply unit 3 includes an air tank 3a and a ventilation path 3d for supplying air through a valve 3b and a fan 3c. Cool air is taken out of the upper part of the air tank 3a through a valve 3e. The air passage 3
In some cases, d may be provided with a branch path 3f and connected to the bottom of the air tank 3a.

The CO _{2 of the} refrigerator ₂ is subjected to heat exchange between the heat radiation of the radiator 2b and the water partially extracted from the lower part of the tank 1a by the pump 1e and passing through the bypass 1d. That is, the water passing through the bypass 1d is heated by the heat radiation of the radiator 2b in the heating unit A, becomes hot water, and is returned to the upper portion of the tank 1a.

On the other hand, the CO ₂ after the heat radiation is reduced in pressure by the throttle valve 2d and then reaches the evaporator 2c where it is evaporated, and the air passing through the ventilation passage 3d is cooled by the heat absorbing action. That is, the air passing through the ventilation path 3d flows into the air tank 3a after being dehumidified and cooled in the cooling section B. The reason for using CO ₂ as the medium of the refrigerator 2 is that
This is because the heat exchange efficiency is better than other media.
, Hot water of about 85 ° C. to 90 ° C. is obtained, and cooler of about 5 ° C. is obtained in the air supply device 3.

In this way, the hot water is generated in the heating section A by the operation of the refrigerator 2 and the cool air is generated in the cooling section B, and the hot water returns to the tank 1a of the water heater 1 and is supplied from below. Cold air is accumulated in a layer on the water, and the cool air flows into the air tank 3a of the air supply device 3 and is stored.

In the present invention, the cold air accumulated in the air tank 3a is used. For example, as shown in FIG.
The first unit 5 is connected to the air tank 3a of the unit U and disposed to the toilet T, and an outlet 5a is attached to the tip of the unit U. The cool air to be supplied can be controlled based on the temperature. The outlet 5a is fixed to a ceiling or a wall of the toilet T.

[0015] Especially in summer, the closed toilet T
The inside is very hot due to the hot air, and it may be hard during use. However, by supplying the cool air to the toilet T as described above, it is possible to lower the internal temperature. So to speak, simple cooling provides comfort. Since the space inside the toilet T is small, it is very convenient to install a cooling device such as a normal air conditioner.

Further, if the second duct 6 is connected to the air tank 3a of the unit U, and this is arranged to the washroom (also a dressing room) S, and the outlet 6a is attached to the tip, the cool air is supplied to the washroom S. Can be supplied. In a general house, the washroom S also has a small space, and if there is no window, hot air is trapped in summer and the heat becomes harder. However, simple cooling by supplying cold air can easily solve the measures against heat. Cool air is obtained from the evaporator 2c when the compressor 2a is driven, that is, when hot water is stored.
Therefore, it is possible to directly use the exhaust cooling heat at the time of the hot water storage operation performed at the time of bathing.

Similarly, if the third duct 7 is connected to the air supply unit 3 of the unit U, and the third duct 7 is provided to the bathroom R and the outlet 7a is attached, the evaporator 2c dehumidifies the bathroom R. Cold air can be supplied. After bathing, bathroom R
Activate the bathroom ventilation fan 8 provided in the
If cool air is supplied from a, convection of air occurs in the bathroom R, and drying can be accelerated. Also at this time, the used hot water is supplied in the same manner as the supply of the cold air to the washroom S, so that the discharged heat can be used. Thereby, even in the case of a bathroom without a window in a condominium such as a condominium, the generation of mold is prevented as much as possible because the hot air does not remain for a long time. Also, in the case of rainy weather, laundry may be hung in the bathroom R. However, by convection of the air as described above, the laundry can be replaced.

In the case where a ventilation fan is also provided in the toilet T or the washroom S, the operation of the ventilation fan and the supply of cool air are used in combination to generate a convection of air to create a more comfortable space. Can be made.

Switches SW are provided at appropriate positions of the toilet T, the washroom S, and the bathroom R so that cool air can be supplied when necessary. Dampers (not shown) are provided at each outlet to cool the cool air. It is preferable that the supply amount can be adjusted. At this time, the evaporator 2 is used to always supply cold air.
Cold storage agent 21c that stores the cold generated by c (see FIG. 3)
Is provided.

Since the toilet T, the washroom S, and the bathroom R are often designed as so-called water areas adjacent to the kitchen, piping for supplying hot water to the water from the water heater 1 of the unit U is provided; Any of the ducts for supplying cool air from the air tank 3a can be easily formed at a short distance,
In addition, it can be conveniently arranged in a concentrated manner.

FIG. 3 is a system configuration diagram showing another embodiment of the unit used in the present invention, in which the performance is enhanced by using a two-stage compression system of CO ₂ . In this case, CO ₂
Is first compressed by the compressor 21a of the refrigerator 21 and then cooled by the air cooler 21e.
After the heat is dissipated at the branch point C, the refrigerant is split at the branch point C, merges with a part of the CO ₂ returned through the expansion valve D1 and the evaporator E1 through the branch path C1, and is compressed in the second stage by the compressor 21a. The compressed CO ₂ is supplied to the radiator 21b.

With the heat radiated by the radiator 21b, the water passing through the bypass 11d of the water heater 11 is heated, and a part of the CO ₂ diverted at the branch point C flows toward the branch path C1.
CO ₂ that has flowed into the branch passage C2 is again diverted by the three-way valve F1 is cooled in the evaporator E1. The CO ₂ flowing into the branch G1 from the three-way valve F1 is supplied to the expansion valve D2 and the evaporator E.
It is returned to the compressor 21a via the two-way valve F2.
On the other hand, CO ₂ flowing into the branch G2 from the three-way valve F1 is
Through the expansion valve D3 is evaporated in the evaporator 21c, a compressor 21a merges after cooling air from the air supply unit 31 by the heat absorption effect at that time, the CO ₂ from the branch passage G1 via the three-way valve F2 Is returned to.

The evaporator 21c is installed in the air tank 31a of the air supply unit 31 and includes a regenerator and a radiating fin. The evaporator 21c cools the air supplied to the air tank 31a through the regenerator as described above. The cooled air is supplied to the toilet T of the building 4 and the like.

In the air supply unit 31, the fan 31c
Is diverted, the air that has flowed into the ventilation path 31d is cooled by the CO ₂ evaporated in the evaporator 21c, and the air that has flowed into the branch path 31f is sent to the air tank 31a. A damper H for air mixing is provided in the air tank 31a, and the temperature of the cool air supplied from the air supply device 31 can be adjusted by appropriately mixing the cool air and the uncooled air with the damper H. It is like that.

[0025]

As described above, according to the present invention, in a CO ₂ water heater attached to a house, cool air is generated by effectively utilizing the evaporative heat which has been conventionally waste heat, and this cool air is passed through a duct. It can be supplied to toilets, washrooms, dressing rooms, bathrooms, etc., so that it is possible to convert uncomfortable toilets and washrooms into a comfortable space with hot air in the summertime, as well as early drying and It has excellent effects such as drying laundry hanging in the bathroom. In particular, cold heat discharged during hot water storage operation in which a water heater performs supplementary hot water, such as when taking a bath, can be used as it is in a dressing room or a bathroom, and effective use of cold heat can be achieved.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a hot water supply unit used in the present invention.

FIG. 2 is a schematic explanatory view showing an embodiment of a cooling and drying apparatus according to the present invention.

FIG. 3 is a system configuration diagram showing another embodiment of the hot water supply unit used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Water heater 2 ... Refrigerator 3 ... Air supply device 4 ... Building 5 ... 1st duct 6 ... 2nd duct 7 ... 3rd duct 11 ... Water heater 21 ... Refrigerator 31 ... Air supply device T ... Toilet S: Toilet (cum dressing room) R: Bathroom U: Unit

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F25B 1/00 381 F25B 1/00 381H 383 383 395 395Z F26B 9/02 F26B 9/02 A (72) Inventor Masaya Matsuoka 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. (Reference) 3L080 AC01 AD00 3L113 AA01 AB02 AC22 AC45 BA39 DA03

Claims (3)

[Claims] A combination of a water heater, a refrigerator having a refrigeration cycle using CO ₂ as a heat medium, and an air supply device raises water supplied to the water heater by radiating the compressed CO _2. Cooling and drying using a hot water supply unit, wherein the air supplied to the air supply unit is cooled by the heat of evaporation of CO ₂ and the cooled air is supplied into the building through a duct. apparatus. 2. A cooling and drying apparatus using a hot water supply unit according to claim 1, wherein cold air is supplied to a bathroom or a washroom / dressing room in the building via the duct. 3. A cooling and drying apparatus using a hot water supply unit according to claim 1, wherein cool air is supplied to a toilet in a building through said duct.