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Heat pump hot-water supply device

A technology for hot water supply and heat pump, which is applied in the detection and prevention of scale adhesion, and can solve problems such as inability to operate heat pump water heaters, reduced heating capacity of heat pump water heaters, and blockage of water pipes, etc.

Inactive Publication Date: 2015-05-13
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When hard cores adhere to the inner surface of the water pipe, scale grows and accumulates, reducing the heating capacity of the heat pump water heater
In addition, when the growth and accumulation of scale develop, the water piping is blocked, and the operation of the heat pump water heater cannot be performed.

Method used

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  • Heat pump hot-water supply device
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  • Heat pump hot-water supply device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 》

[0055] figure 1 It is a schematic diagram of the structure of the heat pump water heater of the first embodiment.

[0056] The heat pump water heater is provided with a heat pump unit 30 that accommodates a component of the heat pump refrigerant circuit and a component of the heated liquid circuit, and a liquid storage unit 40 that accommodates another component of the heated liquid circuit and the component of the liquid supply circuit The operation control part 51 that controls the liquid storage unit 40, the operation control part 52 that controls the heat pump unit 30, and the remote control 50 as an interface to the user are constituted. In addition, the remote control 50, the operation control unit 51, and the operation control unit 52 are communicably connected.

[0057] Next, the structure of the heat pump refrigerant circuit, the heated liquid circuit, and the liquid feed circuit will be described.

[0058]

[0059] The heat pump refrigerant circuit is composed of a compres...

no. 2 approach 》

[0163] Second, use Figure 8 and Picture 9 The heat pump water heater of the second embodiment will be described.

[0164] Figure 8 It is a schematic diagram of the structure of the heat pump water heater of the second embodiment.

[0165] The heat pump water heater of the second embodiment (refer to Figure 8 ) Instead of the heat pump water heater of the first embodiment (refer to figure 1 The water-refrigerant heat exchanger 2 of) includes a low-temperature-side water-refrigerant heat exchanger 2A, a high-temperature-side water-refrigerant heat exchanger 2B, a refrigerant connection pipe 3a, and a water connection pipe 3b.

[0166] The refrigerant discharged from the compressor 1 flows into the refrigerant-side heat transfer tube 2Ba of the high-temperature-side water-refrigerant heat exchanger 2B and the water-side heat transfer tube 2Bb for heat exchange, and flows into the low-temperature-side water refrigerant through the refrigerant connection pipe 3a The refrigerant side h...

no. 3 approach 》

[0173] Second, use Picture 10 and Picture 11 The heat pump water heater of the third embodiment will be described.

[0174] The difference between the heat pump water heater of the third embodiment and the heat pump water heaters of the first and second embodiments is that the method of determining scale precipitation is different.

[0175] The heat pump water heater of the third embodiment is provided with an inlet water temperature sensor 21 that detects the water temperature on the inlet side of the water-refrigerant heat exchanger 2, and the outlet temperature (warm water) of the hot water outlet side of the water-refrigerant heat exchanger 2. The hot water temperature sensor 20 and the water pipe temperature sensor 24 provided in the middle of the water pipe of the water-refrigerant heat exchanger 2 determine the precipitation of scale.

[0176] Picture 10 It is a graph explaining the scale precipitation determination of the heat pump water heater of the third embodiment.

[0...

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Abstract

Provided is a heat pump hot-water supply device capable of determining whether scale is deposited. Specifically disclosed is a heat pump hot-water supply device provided with a heat pump refrigerant circuit which is configured by connecting at least a compressor (1), a refrigerant-side heat transmission tube (2a) of a liquid refrigerant heat exchanger (2), a pressure reduction unit (4), and an air heat exchanger (5) by refrigerant piping, a liquid-to-be-heated circuit which is configured by connecting at least a pump (15) and a liquid-side heat transmission tube (2b) of the liquid refrigerant heat exchanger (2) by liquid piping, a first temperature sensor (20) which detects the temperature of a liquid to be heated on the outlet side of the liquid refrigerant heat exchanger (2), and an operation control means (52) which controls the heat pump refrigerant circuit and / or the liquid-to-be-heated circuit to perform a liquid heating operation, said heat pump hot-water supply device being provided with a second temperature sensor (24) which detects the temperature of the liquid to be heated on the upstream side from the liquid to be heated the temperature of which is detected by the first temperature sensor (20).

Description

Technical field [0001] The invention relates to a heat pump water heater, in particular to the detection and prevention of water rust adhesion. Background technique [0002] The heat pump water heater is usually the following hot water storage heat pump water heater, which uses the discounted electricity fee at night to operate the heat pump and the pump, and heats the normal temperature water (heated liquid) to form high temperature water (high temperature heated liquid). It is stored in a liquid storage tank, and when the faucet is turned on when using hot water during the day, the high-temperature water in the liquid storage tank is mixed with normal temperature water to make warm water to supply hot water. [0003] In addition, the boiling temperature of the water in the heat pump operation of the heat pump water heater is usually about 65°C under normal hot water storage operation (liquid heating operation) ((Company) Japan Refrigeration Air Conditioning Industry Standard (JRA...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H1/00
CPCF24D17/02F24D19/1054F24D2200/123F24D2220/04F24D2220/08F24D2240/26F24D19/0092F24H1/00F24H4/00F24H4/02F24H9/20F24H15/38F24H15/281F24H15/20F24H15/395F24H15/219F24H15/258F24H15/242F24H15/375F24H15/215F24H15/288F24H15/227F24H15/45
Inventor 榎津丰杉山和一村山昌巳
Owner HITACHI APPLIANCES INC
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