CN201059766Y - Cold water bypass defrosting air source heat pump hot-water machine group - Google Patents
Cold water bypass defrosting air source heat pump hot-water machine group Download PDFInfo
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- CN201059766Y CN201059766Y CNU2007200401854U CN200720040185U CN201059766Y CN 201059766 Y CN201059766 Y CN 201059766Y CN U2007200401854 U CNU2007200401854 U CN U2007200401854U CN 200720040185 U CN200720040185 U CN 200720040185U CN 201059766 Y CN201059766 Y CN 201059766Y
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Abstract
The utility model relates to an air source heat pump and hot water machine group for cold water bypass thaw frost, a circulating system is composed of a compressor, a condenser and a throttling device, a four-way change valve used for changing the flow direction of secondary refrigerant and performing the thaw frost is arranged in the system; the condenser is taken as a heat exchanger, a cold water source pipe is connected to the input port of the heat exchanger through a water pump, the output port of the heat exchanger is connected to the input port of a hot water tank through a hot water pipe; the utility model is characterized in that a hot water valve is arranged in the hot water pipe, a bypass low temperature water way is arranged between the hot water valve and the output port of the heat exchanger, and a cut off valve is arranged in the bypass low temperature water way. On the premise of ensuring thaw frost effect, the utility model avoids the heat loss of the hot water tank during the thaw frost process, the utilization rate of hot water is improved, the water temperature change is reduced, and the condenser free from damage can be ensured.
Description
Technical field
The utility model relates to refrigerant and circulating in the closed system that is made of condenser, evaporimeter and compressor, and is heat exchanger with the condenser, cold water is heated up in heat exchanger and pumps into the air-source heat pump hot water group of boiler.
Background technology
Air-source heat pump hot water group of the prior art is to utilize the operation principle of heat pump to design, and its system forms as shown in Figure 1.Refrigerant circulates in closed system shown in Figure 1, the high temperature and high pressure gas of discharging in the compressor 1 enters condenser 2, in condenser 2, carry out heat exchange with cold water, make temperature of cold water rises, simultaneously, high temperature and high pressure gas is condensed into the liquid into middle temperature high pressure, after throttling arrangement 3 throttlings, become low-temp low-pressure liquid again, liquid state with low-temp low-pressure enters evaporimeter 4, absorb the air heat in the evaporation process and make refrigerant evaporation become low-temp low-pressure gas, then sucked compressor 1 again, so carry out systemic circulation with the heat absorption of evaporimeter and the heat release of condenser, simultaneously, the operation of water pump 5 makes cold water storage after heat exchanger heats up go into boiler 6, obtains required hot water in boiler 6.
During this system was provided with, because the air-source heat pump hot water group is to move in low temperature environment, the surface temperature of evaporimeter 4 was very low, be usually less than 0 ℃, thereby cause the surperficial frosting of evaporimeter 4 even freeze, frost or ice sheet have intercepted the heat exchange of air and refrigerant, the reduction unit heat outlet capacity.For this reason, when the evaporator surface frosting acquired a certain degree, defrost in time can effectively be carried out to guarantee air and refrigerant heat exchange, ensures the outlet capacity that heats of unit.
At present, for realize that defrost is cross valve to be set commutate in system, the flow direction that changes refrigerant is carried out defrost, and its operation principle as shown in Figure 2.
The high temperature and high pressure gas that compressor 1 is discharged changes the flow direction through cross valve 7, enter evaporimeter 4 heat radiation defrosts, and condensation become in warm highly pressurised liquid, after throttling arrangement 3 throttlings, become low-temp low-pressure liquid and enter condenser 2, the heat that absorbs water in condenser 2 evaporates and becomes low-temp low-pressure gas, be inhaled into compressor 1 again and carry out compressed action and become high temperature and high pressure gas, circulate and so forth until frostization is clean.In this defrost process, condenser 2 is in the heat absorption state, and what draw is the heat that is pumped into the cold water in the condenser 2 by water pump 5, make the water temperature of cold water lower, and this water at low temperature is infused in the boiler equally.Therefore, defrost each time, boiler all causes water temperature reduction to a certain degree in the whole case because of the injection of water at low temperature, and this not only brings the fluctuation of boiler water temperature, also brings the heat dead wight loss; If in defrost process, stop the operation of water pump, by flowing of water, will cause water in condenser, to be frozen into ice again, condenser can be damaged by spalling.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of air-source heat pump hot water group of cold water bypass defrosting is provided, under the prerequisite that guarantees the defrost effect, avoid defrost process that boiler is brought thermal loss, improve the hot water utilization rate, reduce fluctuating temperature, and can guarantee that condenser is injury-free.
The utility model technical solution problem adopts following technical scheme:
The air-source heat pump hot water group of the utility model cold water bypass defrosting is the circulatory system that constitutes sealing with compressor, condenser, evaporimeter and throttling arrangement, is provided for changing refrigerant in the system and flows to the four-way change-over valve that carries out defrost; With the condenser is heat exchanger, and the cold water source pipe is by the input port of water pump access at heat exchanger, and the output port of heat exchanger is by the input port of hot-water line access at boiler.
The design feature of the air-source heat pump hot water group of the utility model cold water bypass defrosting is in hot-water line, and hot water valve is set, and bypass low temperature water route is set between the output port of hot water valve and heat exchanger, and bypass low temperature is provided with stop valve in the water route.
The air-source heat pump hot water group control method of the utility model cold water bypass defrosting is:
Hot water valve is set opens, stop valve turn-offs, and the circulatory system is operated in the evaporimeter heat absorption, with the water state that heats of condenser heat radiation;
Or hot water valve is set closes, stop valve is opened, and the circulatory system is operated in the evaporimeter heat radiation, with the defrost state of condenser heat absorption.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model stops the water at low temperature that forms in the defrost process to enter boiler by hot water valve is set, the fluctuating temperature of having avoided boiler to cause owing to the injection of water at low temperature, and the deadweight loss of heat.
2, the utility model can directly discharge by this bypass low temperature water route by bypass low temperature water route being set, making the water at low temperature that forms in the defrost process, has avoided being frozen into ice in condenser, has guaranteed that condenser is injury-free.
3, the utility model is simple in structure, control method is easy to implement, and effect is remarkable.
Description of drawings
Fig. 1 is the utility model heat-pump hot-water unit fundamental diagram.
Fig. 2 is an air-source heat pump hot water group defrost fundamental diagram in this prior art.
Fig. 3 is the utility model system architecture schematic diagram.
Fig. 4 is the utility model defrost process operation principle schematic diagram.
Number in the figure: 1 compressor, 2 condensers, 3 throttling arrangements, 4 evaporimeters, 5 water pumps, 6 boilers, 7 cross valves, 8 hot water valve, 9 stop valves, 10 cold water source pipes, 11 hot-water lines, 12 bypass low temperature water routes.
Below, in conjunction with the accompanying drawings the utility model is further described by the specific embodiment:
The specific embodiment
Referring to Fig. 3, Fig. 4, identical with prior art is, unit is the circulatory system that constitutes sealing with compressor 1, condenser 2, evaporimeter 4 and throttling arrangement 3 in the present embodiment, be provided for changing refrigerant in the system and flow to the four-way change-over valve 7 that carries out defrost, and be heat exchanger with condenser 2, the input port that cold water source pipe 10 inserts at heat exchanger by water pump 5, the input port that the output port of heat exchanger inserts at boiler 6 by hot-water line 11.
Shown in the figure, in the present embodiment, in hot-water line 11, hot water valve 8 is set, bypass low temperature water route 12 is set between the output port of hot water valve 8 and heat exchanger, be provided with stop valve 9 in the bypass low temperature water route 12.
The control method of this unit is:
Or hot water valve 8 is set closes, stop valve 9 is opened, and the circulatory system is operated in evaporimeter 4 heat radiations, with in the defrost state of condenser 2 heat absorptions (shown in Figure 4).
During use, when unit is normally produced hot water, by control hot water valve 8 is opened, stop valve 9 is closed; When the unit defrost, by control hot water valve 8 is closed, stop valve 9 is opened; When the unit defrost finishes, open hot water valve 8 again, and close stop valve 9, the recovery unit heats water conservancy project and makes situation.
Claims (1)
1. the air-source heat pump hot water group of cold water bypass defrosting, described unit is the circulatory system that constitutes sealing with compressor (1), condenser (2), evaporimeter (4) and throttling arrangement (3), is provided for changing refrigerant in the system and flows to the four-way change-over valve (7) that carries out defrost; With described condenser (2) is heat exchanger, and cold water source pipe (10) is by the input port of water pump (5) access at heat exchanger, and the output port of heat exchanger is by the input port of hot-water line (11) access in boiler (6); It is characterized in that in described hot-water line (11), hot water valve (8) being set, bypass low temperature water route (12) is set between the output port of hot water valve (8) and heat exchanger, be provided with stop valve (9) in the described bypass low temperature water route (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200401854U CN201059766Y (en) | 2007-06-22 | 2007-06-22 | Cold water bypass defrosting air source heat pump hot-water machine group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200401854U CN201059766Y (en) | 2007-06-22 | 2007-06-22 | Cold water bypass defrosting air source heat pump hot-water machine group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201059766Y true CN201059766Y (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200401854U Expired - Fee Related CN201059766Y (en) | 2007-06-22 | 2007-06-22 | Cold water bypass defrosting air source heat pump hot-water machine group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201059766Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629872A (en) * | 2012-08-29 | 2014-03-12 | 青岛海信日立空调系统有限公司 | Hot water defrosting circulation system for multi-connected air conditioner |
-
2007
- 2007-06-22 CN CNU2007200401854U patent/CN201059766Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629872A (en) * | 2012-08-29 | 2014-03-12 | 青岛海信日立空调系统有限公司 | Hot water defrosting circulation system for multi-connected air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20130622 |