JPH09112969A - Refrigerant heating type cooling heating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an outdoor device to be manufactured in small-sized and light weight and facilitate its installing work as well as its pipe installing work. SOLUTION: A refrigerant heating type cooling heating machine 1 includes a refrigerant compression and expansion cycle (a compressor 39, a condensor 67 and an expansion valve 48 or the like), and further includes a refrigerant heater 17 and a heat exchanger 3 for heat exchanging between the refrigerant and indoor air. The refrigerant heater 17 is comprised of a hot water-refrigerant heat exchanger for heating the refrigerant with hot water supplied by an external hot water supplying heat source machine (a feeding hot water heat-source machine 5). Accordingly, since the heating of the refrigerant is not performed with a gas combustion but with a hot water-refrigerant heat exchanger, not only a heater or a gas pipe, a solenoid valve and a proportional valve can be eliminated, but also a volume of the heat exchanger can be reduced, resulting in that the size of the outdoor device is made compact. In addition, since a gas plug incrementing work accompanied with the installing work can be eliminated, its working can be performed quite easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant heating type air conditioner using a refrigerant such as CFC as a heat medium for cooling and heating. In particular, the present invention relates to a refrigerant heating type air conditioner improved so as to be compact and to eliminate the need for additional construction of a new gas plug.

[0002]

2. Description of the Related Art Cooling and heating machines having a heating medium circulation system as well as a general refrigerant compression and expansion cycle (refrigeration cycle) have already been widely used. In such an air conditioner, by using a heater that burns gas as the heating means, stable heating that is not affected by changes in the outside air temperature can be performed as compared to heating operation in a simple compression-expansion cycle (reverse operation of cooling). You can

FIG. 3 is a schematic system diagram showing the structure of a conventional refrigerant heating type air conditioner having a heater by gas combustion. The conventional refrigerant heating type air conditioner 101 of FIG. 3 has both a compression / expansion cycle of a refrigerant (a normal electric air conditioner) and a heating circuit by gas combustion of the refrigerant.

The compression / expansion (cooling) cycle is performed by the outdoor unit 10
From the compressor 39 drawn in the center of 1a,
Refrigerant piping 41 → four-way valve 43 → piping 65 → condenser 67 → piping 69 → expansion valve 48 → three-way valve 49 → piping 47 → indoor heat exchanger 3 → piping 45 → four-way valve 43 → piping 61 → piping 63 →
The cycle is three-way valve 35 → pipe 37 → compressor 39. The refrigerant gas is compressed by the compressor 39 (driven by the motor 38), cooled by the outside air in the condenser 67 to become a liquid, expanded by the expansion valve 48 to become a gas, and the temperature decreases due to the latent heat of vaporization at that time, The indoor heat exchanger 3 exchanges heat with the indoor air to cool the indoor air. A fan (not shown) is provided in the condenser 67 and the indoor heat exchanger 3.

The refrigerant heating circulation (heating) cycle is as follows: compressor 39 → refrigerant pipe 41 → pipe 45 → indoor heat exchanger 3 → pipe 47 → three-way valve 49 → pipe 51 → refrigerant heater 1
The cycle is the heating pipe 105, the pipe 33, the three-way valve 35, and the compressor 39 in 03. Refrigerant heater 103
In, the refrigerant in the heating pipe 105 is heated by the gas burner 107, and the heated refrigerant is compressed by the compressor 39.
Is sent to the indoor heat exchanger 3 and exchanges heat with the indoor air to heat the indoor air. Gas is supplied to the gas burner 107 from a gas source pipe 117 via two electromagnetic valves 115 and 113, a pipe 109, and a proportional valve 111.
Here, the solenoid valves 113 and 115 turn the gas supply ON-OF.
The proportional valve 111 is an automatic control gas flow rate control valve for controlling the amount of heating of the refrigerant.

FIG. 4 is a schematic system diagram showing the structure of a conventional hot water heating type air conditioner. This hot water heating type air conditioner 1
20 is a compression / expansion cycle of the refrigerant as a cooling device,
It has a hot water heating circulation cycle as a heating device. The compression / expansion cycle of the refrigerant is performed by the compressor 39 depicted in the lower part of the outdoor unit 120a → the refrigerant pipe 65 → the condenser 67.
→ expansion valve 48 → pipe 69 → pipe 47 → indoor heat exchanger 12
The cycle is 1 → pipe 45 → pipe 61 → compressor 39. The operation is similar to that of the refrigerant heating type air conditioner of FIG.

The hot water heating circulation cycle of the hot water heating type air conditioner shown in FIG. 4 has a pump 127 drawn on the right side of the middle stage of the outdoor unit 120a → a heating pipe 119 in a hot water heater 118 →
The cycle is hot water pipe 129 → pipe 131 → heating heat exchanger 123 → pipe 125 → pump 127. In this cycle, the hot water is heated by the burner 107 of the heater 118, and the heating heat exchanger 123 exchanges heat with the indoor air to warm the indoor air.

FIG. 5 is a schematic system diagram showing the structure of a conventional heating and cooling machine in which a hot-water supply heat source machine and a cooling-only outdoor machine are combined. Like the hot water-refrigerant heat exchanger in FIG. 4, the air conditioner in FIG. 5 also has a refrigerant compression / expansion cycle as a cooling device and a hot water heating circulation cycle as a heating device. The compression / expansion cycle of the refrigerant is as follows: compressor 39 → refrigerant pipe 65 → condenser 67 → expansion valve 48 → pipe 69 → pipe 47 → indoor heat exchanger 121 → indicated below the outdoor unit 120a.
It is a cycle of piping 45 → compressor 39.
The operation is similar to that of the refrigerant heating type air conditioner of FIG.

The hot water heating circulation cycle of the air conditioner shown in FIG. 5 does not have its own combustor, and the external hot water supply heat source device 5 is used.
It receives a circulating supply of hot water from. That is, hot water is supplied to the heating heat exchanger 123 (inside the indoor unit 142) from the hot water pipe 11 branched from the outgoing pipe 7a of the circulating hot water supply line 7 of the hot water supply heat source device 5 through the electromagnetic valve 13 and the pipe 131. After warming the indoor air at, it is returned to the return pipe 7b of the circulating hot water supply line 7 via the pipe 125. Note that the circulating hot water supply line 7 of the hot water supply heat source device 5 is connected to other hot water demand equipment such as a floor heating device 9.

[0010]

The above three types of air conditioners and heaters have the following problems. (1) Conventional refrigerant heating type air conditioner of FIG. 3: In addition to the heat exchanger, the burner and combustion chamber for gas combustion, the air intake fan attached to it, the exhaust port, and Since the gas pipe, proportional valve, and solenoid valve were required, the outdoor unit had to be large. Since it is necessary to install gas piping in the outdoor unit, it was necessary to install gas piping near the location where the outdoor unit was installed.

(2) Hot water heating type air conditioner of FIG. 4: In the heater by gas combustion, in addition to the heat exchanger, a burner and a combustion chamber for gas combustion, an air intake fan attached thereto, an exhaust port, Furthermore, the gas piping, proportional valve, and solenoid valve were required, so the outdoor unit had to be large. Since it is necessary to install gas piping in the outdoor unit, it was necessary to install gas piping near the location where the outdoor unit was installed. Since a total of four pipes of a return refrigerant pipe (47, 45 in FIG. 4) and a return hot water pipe (131, 125 in FIG. 4) must be provided between the outdoor unit and the indoor unit. It took a lot of time to construct.

(3) A cooling and heating machine in which the hot water supply heat source device of FIG. 5 and an outdoor unit dedicated to cooling are combined: a return refrigerant pipe (47 and 45 in FIG. 5) and a return hot water pipe (131 in FIG. 5, Since a total of four pipes of 125) have to be piped between the outdoor unit and the indoor unit, the construction is troublesome.

It is an object of the present invention to provide a cooling and heating machine which enables downsizing and weight saving of the outdoor unit and facilitates installation work and piping work.

[0014]

In order to solve the above problems, a refrigerant heating type air conditioner of the present invention includes a refrigerant compression / expansion cycle, and has a refrigerant heater and a heat exchanger for refrigerant and room air. A refrigerant heating type air conditioner provided with a refrigerant circulation circuit; hot water in which the refrigerant heater heats the refrigerant by hot water supplied from an external hot water supply heat source unit.
It is characterized by comprising a refrigerant heat exchanger. Therefore,
Since the heating of the refrigerant is not the gas combustion type but the hot water-refrigerant heat exchanger type, a large-volume heater and a proportional valve are not required, so the outdoor unit becomes compact. Moreover, since the gas piping work associated with the installation work is unnecessary, the work is extremely easy. Here, the hot water supply heat source machine refers to a machine that heats hot water supplied to a hot water circuit circulating in the building.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a more specific description will be given with reference to the drawings according to the embodiments of the present invention. FIG.
FIG. 1 is a schematic system diagram showing the configuration of a refrigerant heating type air conditioner according to an embodiment of the present invention. The refrigerant heating-type air conditioner of FIG. 1 has both a compression expansion cycle of a refrigerant (normal electric air conditioner) and a heating circulation cycle of the refrigerant, like the conventional refrigerant heating air conditioner of FIG.

That is, the compression / expansion cycle is performed by the outdoor unit 1
From the compressor 39 drawn in the center of a, from the refrigerant pipe 41 → four-way valve 43 → pipe 65 → condenser 67 → pipe 69 → expansion valve 48 → three-way valve 49 → pipe 47 → indoor heat exchanger 3 → pipe 45 The cycle is four-way valve 43, pipe 61, pipe 63, three-way valve 35, pipe 37, and compressor 39. The refrigerant gas is compressed by the compressor 39 (driven by the motor 38), cooled by the outside air in the condenser 67 to become a liquid, and expanded by the expansion valve 48 to become a gas,
The latent heat of vaporization at that time lowers the temperature, and the indoor heat exchanger 3 exchanges heat with the indoor air to cool the indoor air.

The heating circulation cycle of the refrigerant is as follows: compressor 39 → refrigerant piping 41 → four-way valve 43 → piping 45 → indoor heat exchanger 3 → piping 47 → three-way valve 49 → piping 51 → hot water-heat in the refrigerant heat exchanger 17. Exchange refrigerant tube 31 → Piping 33 →
The cycle is three-way valve 35 → pipe 37 → compressor 39. Here, as a characteristic matter of the present invention,
The hot water heating circulation cycle of the refrigerant heating type air conditioner 1 does not have its own heater, but receives hot water circulating supply from the hot water supply heat source device 5 which is an external heat source device. That is, from the hot water pipe 11 branched from the outgoing pipe 7a of the circulating hot water supply line 7 of the hot water supply heat source device 5, through the solenoid valve 13 and the pipe 15,
Hot water is supplied to the hot water-refrigerant heat exchanger 17 in the outdoor unit 1a. Here, heat is exchanged between the hot water passing through the heat exchange hot water tube 19 and the refrigerant passing through the heat exchange refrigerant tube 31 to warm the refrigerant. The hot water leaving the heat exchanger hot water tube 19 is returned to the return pipe 7b of the circulating hot water supply line 7 via the pipe 21.

FIG. 2 is a plan view showing a double pipe heat exchanger as an example of the hot water-refrigerant heat exchanger of the refrigerant heating / cooling machine of FIG. The double-tube heat exchanger 17 of FIG. 2 performs heat exchange between the heat exchange hot water tube 19 and the heat exchange refrigerant tube 31. That is, a relatively thin heat exchange refrigerant tube 31b is provided inside the heat exchange hot water tube 19b, which is a thick outer tube.
Is passing. The hot water enters from the heat exchange hot water tube 19a on the inlet side, passes through the heat exchanger hot water tube 19b at the central portion, and exits from the heat exchanger hot water tube 19c on the outlet side. The heat exchange hot water tube 19b is spirally wound in the depth direction of the drawing (about one and a half turns in this example). Similarly, the refrigerant enters from the heat exchange refrigerant tube 31a on the inlet side, passes through the heat exchanger refrigerant tube 31b on the central portion, and the heat exchanger refrigerant tube 3 on the outlet side.
Go out from 1c. In the heat exchanger 17, the hot water and the refrigerant flow in the opposite directions.

Specific dimensions and the like of the hot water-refrigerant heat exchanger for a refrigerant heating type air conditioner for 8 to 10 tatami mats will be described. Inner pipe (refrigerant pipe): Diameter 12.7 mm x wall thickness 1.0 mm x length 1.31 m Outer pipe (hot water pipe): Diameter 22.2 mm x wall thickness 1.2 mm x length 1.14 m Pipe material: C1220T -O (copper) Heat transfer area: 0.05 m ² Volume: 2.7 liters The value of this volume is 3 liters compared to the volume of 10 liters of the gas burner type heater in the conventional refrigerant heating and cooling machine.
It is one-seventh. Generally, the volume of the refrigerant heater can be set to 1/3 to 1/4 of the conventional volume.

That is, the features of the refrigerant heating type air conditioner of this embodiment are summarized as follows. Instead of a conventional heater, a hot water-refrigerant heat exchanger is provided to heat the refrigerant, so a heater, gas pipe, solenoid valve,
Since the proportional valve is unnecessary, the outdoor unit can be made smaller and lighter. The hot water pipe is connected to the existing water heater and supplies hot water for heating the refrigerant, so no gas pipe is required.
There are no restrictions on the installation location, and there is no need to add a new gas tap. Since the heat supplied to the indoor unit is supplied by the refrigerant heated by the heat exchanger, the piping to the room is only the refrigerant pipe, which makes the construction easier than the conventional hot-water heating air conditioner.

FIG. 6 is a schematic system diagram showing the structure of a refrigerant heating type air conditioner according to another embodiment of the present invention. In this embodiment, the outdoor unit 120a of the conventional hot water heating type air conditioner is used as the hot water supply heat source device. That is, the hot water heated by the hot water heater 118 of the outdoor unit 120a of the existing hot water heating type air conditioner is branched from the hot water pipe 131 to be taken out (hot water pipe 151) and guided to the outdoor unit 1a of the refrigerant heating type air conditioner. The heat exchange hot water tube 19 of the hot water-refrigerant heat exchanger 17 in the outdoor unit 1a is charged.
Hot water exiting the heat exchanger hot water tube 19 is pipe 21 → pipe 1
After 53, it is returned to the hot water return pipe 125 of the outdoor unit 120a of the hot water heating type air conditioner. In this embodiment, a refrigerant heating type air conditioner 1 for another room is additionally installed in addition to an existing hot water heating type air conditioner for a room.

In the embodiment shown in FIG. 6, one gas combustion type hot water heater (heater 11 of the hot water heating type air conditioner outdoor unit 120a is used).
8) is supplying hot water to the two air conditioners. At first glance, such means may lead to insufficient capacity of the hot water heater. However, in general, the heater (heating) exerts its maximum capacity when heating the cold room and starting to heat it, and it takes only a fraction of the capacity after the room becomes warm. Therefore, the problem of insufficient heating capacity does not occur except when the room with the existing hot water heating type air conditioner and the room with the new refrigerant heating type air conditioner are started to be heated at the same time. Also, if you start heating at the same time,
It takes a little longer to warm up.

[0023]

As is clear from the above description, the refrigerant heating type air conditioner of the present invention exhibits the following effects. Since the conventional heater, gas pipe, solenoid valve, and proportional valve are not required, the outdoor unit can be made smaller and lighter. Since hot water for heating the refrigerant is supplied from an existing water heater or the like, there is no need for a gas pipe, so there is no restriction on the installation location, and there is no need to add a new gas tap. Since the heat supplied to the indoor unit is supplied by the refrigerant heated by the heat exchanger, only the refrigerant pipe is provided for the room, which makes the installation easier than the conventional hot water heating type air conditioner. An existing hot water heating type air conditioner can be used as the hot water heat source device, which facilitates installation.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram showing a configuration of a refrigerant heating type air conditioner according to an embodiment of the present invention.

FIG. 2 is a plan view showing a double-tube heat exchanger as an example of hot water-refrigerant heat exchanger of the refrigerant heating / cooling machine of FIG.

FIG. 3 is a schematic system diagram showing a configuration of a conventional refrigerant heating type air conditioner having a gas burner.

FIG. 4 is a schematic system diagram showing a configuration of a conventional hot water heating type air conditioner.

FIG. 5 is a schematic system diagram showing a configuration of a cooling and heating machine in which a hot water supply heat source device and a conventional outdoor unit for cooling are combined.

FIG. 6 is a schematic system diagram showing a configuration of a refrigerant heating type air conditioner according to another embodiment of the present invention.

[Explanation of symbols]

1 Air Conditioner 1a Outdoor Unit 1b Indoor Unit 3 Indoor Heat Exchanger 5 Hot Water Supply Heat Source Machine 7 Circulating Hot Water Supply Line 9 Floor Heating System 11 Branch Pipe 13 Solenoid Valve 15, 21 Hot Water Piping 17 Hot Water-Refrigerant Heat Exchanger 19 Heat Exchange Hot Water Tube 31 Heat exchange refrigerant tubes 33, 37, 41, 45, 47, 51, 61, 63, 6
5, 69 Refrigerant piping 35, 49 Three-way valve 38 Motor 39 Compressor 43 Four-way valve 48 Expansion valve 67 Condenser 101 Conventional refrigerant heating / cooling machine 101a Outdoor unit 101b Indoor unit 103 Refrigerant heater 105 Heating pipe 107 Burner 109 Gas pipe 111 Proportional valve 113, 115 Solenoid valve 117 Gas source pipe 118 Hot water heater 119 Heating pipe 120 Hot water heating type air conditioner 120a Outdoor unit 120b Indoor unit 121 Cooling heat exchanger 123 Heating heat exchanger 125, 129, 131 Hot water pipe 127 Pump 140 Cooling outdoor unit 142 Indoor unit 151, 153 Hot water piping

Claims (4)

[Claims] 1. A refrigerant heating type air conditioner comprising a refrigerant compression / expansion cycle and comprising a refrigerant circulation circuit having a refrigerant heater and a heat exchanger for refrigerant and room air; Is a hot water-refrigerant heat exchanger that heats the refrigerant with hot water supplied from an external hot water supply heat source machine. 2. The refrigerant heating and cooling machine according to claim 1, wherein the hot water-refrigerant heat exchanger is a double-tube heat exchanger. 3. The refrigerant heating type air conditioner according to claim 1, wherein the hot water supply heat source device is a hot water supply heat source device. 4. The refrigerant heating / cooling machine according to claim 1, wherein the hot water supply heat source machine is a hot water heating / cooling machine.