JPS6053733A - Heat pump hot-water supplying machine - Google Patents

Abstract

PURPOSE:To obtain predetermined high-temperature hot-water and improve the efficiency of the machine by a method wherein heat exchangers for high-temperature hot-water and medium-temperature hot-water and a hot-water reserving tank are connected through a three-way flow amount control valve while the three-way valve is controlled by the temperature of the high temperature hot-water and a compressor is controlled by the temperature of the medium temperature hot-water. CONSTITUTION:High-temperature refrigerant gas circulates the compressor 1, first heat exchanger 2 and second heat exchanger 3 sequentially to heat water, circulating a circulating pump 9, the second heat exchanger 3, the three-way flow amount control valve 11 and the first heat exchanger 2 sequentially. In this case, the three-way flow amount control valve 11 is controlled by the outlet hot-water temperature of the first heat exchanger 2 so as to obtain the predetermined high-temperature of hot-water while the valve 11 is closed by the temperature of a high temperature section 14 to promote the reservation of medium temperature hot- water after finishing the reservation of the high-temperature hot-water. The water circulating pump 9 is controled by the outlet temperature 12 of the second heat exchanger 3 and the predetermined medium-temperature hot-water is obtained. When the reservation of the medium temperature hot-water is finished, the compressor 1 is stopped by the temperature of medium temperature section 15. According to this method, the high-temperature hot-water may be obtained with a high efficiency.

Description

[Detailed Description of the Invention] Industrial Application Field 2. The present invention relates to a water heater using a heat pump.

Conventional configuration and its problems In conventional heat pump water heaters, when trying to obtain a hot water storage tank, the condensation pressure of the refrigerant increases, resulting in a heat exchanger with the refrigerant in the high-temperature gas region. It has been proposed to provide a heat exchanger with a refrigerant in the phase region and liquid region to obtain hot water at two temperature levels: high temperature water and medium temperature water. In such a configuration with two heat exchangers, there is a problem in the method of controlling the amount of circulating water flowing through each heat exchanger in order to obtain predetermined high temperature hot water and medium temperature hot water.

OBJECTS OF THE INVENTION The present invention solves the problems of the conventional heat pump, and provides a heat pump capable of obtaining hot water at a predetermined temperature under any operating conditions and performing highly efficient operation without increasing the condensing pressure. The purpose is to

Structure of the Invention In order to achieve this object, the present invention comprises a heat exchanger for producing hot water including a first heat exchanger and a second heat exchanger, and a A bypass path to the hot water tank is provided by a three-way flow control valve, and the refrigerant is transferred from the compressor through the first heat exchanger to the second heat exchanger, and the water is transferred from the hot water tank to the second heat exchanger using a circulation pump. 2 heat exchangers, 3-way flow force 1, flow to the first heat exchanger through a control valve, high temperature water is created in the first heat exchanger, medium temperature layer is created in the second heat exchanger, and the connection position of the bipanu path of the hot water storage tank is A high temperature hot water storage detection section is provided near the top, and the operation of this high temperature hot water storage detection section closes the flow path from the 3-way/71t quantity control valve to the first heat exchanger side, and near the bottom of the hot water storage tank. In this system, a medium-temperature hot water storage detection section is provided, and the operation of the compressor is stopped by the operation of the medium-temperature hot water storage detection section.

By various configurations, the refrigerant Takagata gas region flowing into the first heat exchanger can be effectively used to reduce the amount of circulating water.
-53733 (2) It is possible to make a part of hot water into high temperature hot water, form a high temperature hot water storage layer from the top of the hot water storage tank, and also reduce ρ1 of the gas-liquid two-phase region and the liquid phase region in the condensation process of the refrigerant in the second heat exchanger. It is effectively used to create a medium-temperature layer, and has the effect of forming a medium-temperature hot water storage layer downward from the middle part of the hot water storage tank.

Furthermore, when the storage of hot water in the high-temperature hot water storage tank with a small amount of hot water actually used is completed, the high-temperature hot water storage detection unit is activated to close the branch path from the three-way flow control valve to the first heat exchanger, and the second heat exchanger is closed. The exchanger can intensively create a medium temperature layer, and the operation of the medium temperature hot water storage detection unit near the bottom of the hot water storage tank can stop the operation of the compressor, allowing storage of medium temperature hot water, which requires a large amount of hot water in actual use. By making it the main body, it has the effect of performing highly efficient operation.

Description of examples An embodiment of the present invention will be described below with reference to the drawings.

1 is a compressor, 2 (d is a first heat exchanger, 3 is a second heat exchanger,
4 is a capillary cube, 5 is an evaporator, 6 is a fan, 7
is an accumulator, which constitutes the refrigerant circuit of the reheat pump. In addition, 8 is a hot water storage tank, 9 is a circulation pump, 10 is an output 1"l of the second heat exchanger 5 pager 3, 11111 is a hot water temperature detection part for medium temperature water, and the circulation pump is set at 90 rotations in order to create a predetermined medium temperature layer. According to
The circulating water b1 is controlled. 11 is a three-way flow control valve, 1
2 is a bypass path, 13 is an outlet flll of the first heat exchanger 2
l The hot water temperature detection section of the IF71 warm water bath operates the three-way flow rate control valve 11 to control the divided flow rate of the intermediate temperature layer to the first heat exchanger 2 side in order to produce a predetermined high temperature hot water. Reference numeral 14 denotes a high-temperature hot water storage detection unit installed near the upper part of the connection to the bypass path of the hot water storage tank 8, and the high-temperature hot water produced by the first heat exchanger 2 flows from the top of the hot water storage tank 8 to form a high-temperature hot water storage layer. When this happens, high-temperature hot water is detected and the three-way flow control valve 11 is operated to close the branch flow path to the first heat exchanger 2 side. Reference numeral 15 denotes a medium-temperature hot water storage detection unit installed near the bottom of the hot water tank 8, which divides the medium-temperature layer created by the second heat exchanger 3 with the three-way flow control valve 11 and connects it from the bypass path 12 to the intermediate position below the hot water tank 8. The system forms a medium-temperature hot water storage layer, and when the medium-temperature layer is completed, the medium-temperature layer is detected and the compressor operation is stopped.

In addition, 16 is a hot water temperature adjustment mixer faucet, which adjusts the hot water temperature suitable for use by high-temperature water, medium-temperature water, or a mixture thereof, and dispenses hot water through the hot water tap 17. 18 is a water supply pipe.

In the above configuration, high-temperature refrigerant gas from the compressor 1 flows into the first heat exchanger 2, and the medium-temperature layer from the second heat exchanger 3, which is separated by the three-way flow control valve 11, is heated to high-temperature water. do.

At this time, the detection unit 13 operates the three-way flow control valve 11 to control the divided flow rate to the first heat exchanger 2 so that the hot water at the outlet of the first heat exchanger 2 becomes a predetermined high temperature hot water. Therefore, in the first heat exchanger 2, a predetermined high-temperature hot water is obtained in any operation of the heat pump, and this hot water is stored one after another from the top of the hot water storage tank 8. The refrigerant gas that has produced high-temperature hot water in the first heat exchanger 2 flows into the second heat exchanger 3 and exchanges heat with water fed by the pump 9 to form a medium-temperature layer.

That is, the refrigerant flowing through the second heat exchanger 3 changes from a gas-liquid two-phase state during the condensation process to a liquid phase after completion of condensation. Second heat exchanger 3
The amount of circulating water flowing through the second heat exchanger 3 is controlled by the rotation speed of the pump 9 by the detection unit 10 of the outlet temperature of the second heat exchanger 3.
A predetermined intermediate temperature layer is always obtained at the outlet of the heat exchanger 3. This middle temperature layer is 7 Behmi! The three-way flow rate control valve 11 diverts the hot water to the first heat exchanger 2 side, via the bypass path 12, and to the hot water storage tank 8.
The medium-temperature hot water diverted to 5 is stored below the bypass passage 12 as a medium-temperature hot water layer.

As shown in Figure 2, a high temperature hot water storage layer and a medium temperature hot water storage layer are formed in the hot water storage 4t'va, but in actual use, the medium temperature hot water storage is used more often. Therefore, when the hot water storage in the high temperature hot water storage layer is completed, the detection unit 14
: Activate the three-way flow 111 control valve 11 to connect the first heat exchanger 2.
Close the branch channel to the side, and use the second heat exchanger 3 to /11 will be created intensively. Furthermore, when the storage of hot water in the medium-temperature storage layer m is completed, the compressor is stopped by the operation of the detection unit 15, and all hot water storage operations are ended.

According to the heat pump water heater of the present invention, the following effects can be obtained.

(1) The heat exchanger for producing hot water consists of a first heat exchanger and a second heat exchanger, and a three-way flow control valve is placed between both heat exchangers to provide a bypass path to the hot water storage tank. , the refrigerant flows from the compressor to the second heat exchanger via the first heat exchanger, and the water flows from the hot water storage tank to the second heat exchanger using the circulation pump, and then to the first heat exchanger via the three-way flow control valve. Therefore, high temperature water is supplied from the first heat exchanger,
Since medium-temperature hot water can be produced and stored from the second heat exchanger, it is effective to obtain hot water suitable for practical use.

(2) Furthermore, a high-temperature hot water storage detection section is provided near the upper part of the bypass path connection position of the hot water storage tank, and the operation of this detection section closes the branch flow path from the three-way flow control valve to the first heat exchanger side; A medium-temperature hot water storage detection section is provided near the bottom of the hot water storage tank, and the operation of this detection section stops the operation of the compressor, so that the main operation is medium-temperature hot water storage operation where a larger amount of hot water is desired. It is possible to perform highly efficient heat pump hot water supply.

a) The first system that effectively utilizes the high temperature refrigerant gas area from the compressor.
High-temperature water is produced in the heat exchanger, and medium-temperature water is produced in the second heat exchanger using the condensed two-phase region and liquid phase region of the refrigerant.
Since the condensation temperature and pressure of the refrigerant can be set using medium-temperature water, highly efficient P1-pump water supply can be performed while obtaining high-temperature water.

4 To obtain high-temperature hot water, the condensing temperature and pressure must be raised by 9
Since there is no page loss, it is possible to guarantee the reliability of the pressure resistance of the device and the heat resistance of the members in practical use.

[Brief explanation of drawings]

The figure is an overall configuration diagram showing an embodiment of a heat pump water heater according to the present invention. 1... Compressor, 2... First heat exchanger,
3...Second heat exchanger, 8...Hot water storage tank,
9...Circulation pump, 11...3-way flow control valve, 12...Bypass path, 14...
- High temperature hot water storage detection section, 15... Medium temperature hot water storage detection section.

Claims (1)

[Claims] The heat exchanger for producing hot water consists of a first heat exchanger and a second heat exchanger, and a three-way flow control valve is arranged between the first and second heat exchangers to bypass the hot water tank. The refrigerant flows from the compressor through the first heat exchanger to the second P exchanger, and the water flows through the circulation pump from the hot water tank to the second heat exchanger, and then through the three-way flow control valve to the first heat exchanger. A high temperature hot water storage detection unit is provided near one side of the bypass path connection position of the hot water storage tank. The flow path from the three-way flow rate control valve to the first heat exchanger is closed by the operation of A heat pump water heater configured to stop operation.