Heat-pump hot water supply apparatus

A heat pump water heater and hot water technology, which is applied to fluid heaters, energy-saving heating/cooling, lighting and heating equipment, etc., can solve the problems of insufficient hot water quantity and low hot water temperature, so as to improve the convenience and convenience of use. , the effect of eliminating anxiety

Inactive Publication Date: 2006-09-27
HITACHI APPLIANCES INC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] For example, when the outside air temperature is low in winter, after the supply of hot water for bathing is completed, when the shower is used in a short time, the air heat exchanger will be in a state of frost, which is prone to insufficient hot water or low temperature of the supplied hot water Case

Method used

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  • Heat-pump hot water supply apparatus
  • Heat-pump hot water supply apparatus
  • Heat-pump hot water supply apparatus

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Embodiment 1

[0028] figure 1 The shown heat pump water heater according to one embodiment of the present invention has a heat pump refrigerant circuit 30 , a hot water supply circuit 40 , and an operation control device 50 .

[0029] The heat pump refrigerant circuit 30 is a dual-circulation method with two parts each, and the compressors 1a, 1b, and the refrigerant-side heat transfer tube 2a arranged on the water-refrigerant heat exchanger 2 are connected in sequence through refrigerant pipes. , 2b, decompression devices 3a, 3b, air heat exchangers 4a, 4b, the refrigerant circuit 30 is sealed with refrigerant.

[0030] The compressors 1a and 1b are capable of capacity control, and operate at a large capacity when supplying a large amount of hot water. Here, the compressors 1a and 1b are controlled from low speed (such as 700 rpm) to high speed (such as 7000 rpm) through PWM control, voltage control (such as PAM control) and combination control of these control methods. .

[0031] The w...

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PUM

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Abstract

The invention relates to a heat pump water heater, which can supply hot water from hot water storage pot, and heat water at the same time, to avoid prolonging the time of circling hot water caused by the air heat exchanger is frosted, wherein it comprises: detecting the temperature of air heat exchanger; setting defrost initial temperature and the needed defrost temperature lower than the initial temperature; when it is between said two temperature, defrosting after circling the hot water, then stops; when it is under the needed defrost temperature, alarming and defrosting first, then circling hot water.

Description

technical field [0001] The invention relates to improving the convenience of use when a heat pump water heater is frosted at a low temperature. Background technique [0002] The original heat pump water heater is generally used to store hot water, that is, it is the same as the electric water heater, equipped with a large-capacity hot water storage tank of 300L ~ 500L, and uses cheap electricity at night when the electricity price is low at night to run the heat pump at night. After heating the water Store in a hot water storage tank, and use the above-mentioned stored hot water during the day. [0003] In recent years, a technical solution of an instant heat pump water heater has been proposed by setting a hot water storage tank supply hot water circuit that supplies hot water from a hot water storage tank at the start of operation and directly supplying hot water heated by heat pump operation The direct hot water supply circuit, when the hot water is used from the water t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/02F25B47/02F25B49/00
CPCF24H4/02F24H9/2007F25B47/02Y02B30/12Y02B30/70F24H1/54
Inventor 远藤和广权守仁彦高木纯一
Owner HITACHI APPLIANCES INC
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