CN2819131Y - Hot pump system iwth defrosting construction - Google Patents

Abstract

The utility model relates to a hot pump system with a defrosting structure, which comprises an evaporator, a compressor, a heat exchanger, a liquid reservoir, a dry filter and an expansion valve and forms a circulation loop, wherein a defrosting inflow pipe and a defrosting reflux pipe which are directly connected to the evaporator are additionally arranged on a coolant pipeline between the dry filter and the expansion valve. A reflux pipe with a manual switch is arranged between the defrosting inflow pipe and the defrosting reflux pipe, a first electromagnetic valve is arranged between an inlet end of the reflux pipe and an inlet end of the defrosting inflow pipe, and a second electromagnetic valve is arranged between an outlet end of the reflux pipe and the inlet end of the defrosting inflow pipe. With the arrangement of the defrosting inflow pipe and the defrosting reflux pipe, the utility model can use medium-temperature liquefied coolant remained after hot water preparation to defrost the evaporator, so that energy source can be sufficiently used for preventing the evaporator from being frosted.

Description

The heat pump of tool defrosting structure

Technical field

The utility model is the heat pump about a kind of tool defrosting structure, refers in particular to the heat pump that a kind of evaporimeter that can avoid heat pump produces the tool defrosting structure of frosting problem.

Background technology

Because heat pump is applied to heat hot water and can effectively saves energy cost, plays the opening of Japanese market since calendar year 2001, use the water heater of the heat pump of carbon-dioxide gas compressor to continue to increase, and then the attention that is subjected to masses gradually.

Please referring to shown in Figure 2, this is general existing heat pump schematic diagram, and its basic building block includes evaporimeter 40, compressor 41, heat exchanger 42, reservoir 42, device for drying and filtering 44 and expansion valve 45 and forms a closed circuit.

Be lower than in the whole day room temperature under 0 ℃ the low temperature environment, do not have many suitable heat pumps, air heat source and thermal pump (AIR-SOURCE HEAT PUMP) with the past, its efficient and heating efficiency can descend because of the low temperature of environment, therefore be the heat pump of refrigerant with the carbon dioxide owing to can overcome the problems referred to above, and generally be subjected to the use in low temperature environment zone.

But, evaporimeter 40 in the above-mentioned heat pump and heat exchanger more than 42 are arranged on the open air, at cold region, because evaporimeter 40 ends are the states that belong to lower temperature, the possibility that ten minutes is easy to generate frosting, freezes, and then the heat that causes evaporimeter 40 to pass be that number increases, make that obtaining of heat is more difficult, cause the low of running efficiency.

The present utility model in the hope of improving above-mentioned traditional problem, through constantly test and effort, is developed the utility model because the problem that the evaporimeter of above-mentioned heat pump assembly is run into is actively to set about being engaged in research and development finally when cold region uses.

The utility model content

Main purpose of the present utility model is to provide a kind of and utilizes refrigerant in heat pump self loop with the heat pump of the tool defrosting structure that carries out the evaporator defrost action.

In order to reach above-mentioned utility model purpose, the utility model is to take following technological means to be reached, wherein the utility model is to include evaporimeter, compressor, heat exchanger, reservoir, device for drying and filtering and expansion valve and form a closed circuit, and its improvement is:

On the refrigerant pipeline between this device for drying and filtering and expansion valve, other has additional defrosting inflow pipe and the defrosting return duct that is connected directly to evaporimeter, between defrosting inflow pipe and defrosting return duct, be provided with the return duct of a tool hand switch, at the return duct arrival end and defrost and be provided with first magnetic valve between the hot inflow pipe arrival end, at the return duct port of export and defrost and be provided with second magnetic valve between the hot inflow pipe arrival end.

By the setting by defrosting inflow pipe and defrosting return duct, remaining middle temperature liquid refrigerants carried out the usefulness of evaporator defrost after the utility model can utilize the hot water manufacturing, so can utilize the energy to suppress the situation of evaporimeter frosting fully.

Description of drawings

Fig. 1 is a loop of the present utility model schematic diagram;

Fig. 2 is traditional loop schematic diagram.

[primary clustering symbol description]

10 evaporimeters

11 compressors

12 heat exchangers

13 reservoirs

14 devices for drying and filtering

15 expansion valves

16 defrosting inflow pipes

17 defrosting return ducts

18 return ducts

19 hand switches

20 first magnetic valves

21 second magnetic valves

40 evaporimeters

41 compressors

42 heat exchangers

43 reservoirs

44 devices for drying and filtering

45 expansion valves

The specific embodiment

Please referring to shown in Figure 1, the heat pump of the utility model tool defrosting structure is to include evaporimeter 10, compressor 11, heat exchanger 12, reservoir 13, device for drying and filtering 14 and expansion valve 15 and form a closed circuit, and its improvement is:

On the refrigerant pipeline that this device for drying and filtering 14 and expansion valve are 15, other has additional defrosting inflow pipe 16 and the defrosting return duct 17 that is connected directly to evaporimeter 10, between defrosting inflow pipe 16 and defrosting return duct 17, be provided with the return duct 18 of a tool hand switch 19, at return duct 18 arrival ends and defrost and be provided with first magnetic valve 20 between hot inflow pipe 16 arrival ends, at return duct 18 ports of export and defrost and be provided with second magnetic valve 21 between hot inflow pipe 16 arrival ends.

The utility model is under the general operation situation, and first magnetic valve 20 is closed conditions, and second magnetic valve 21 is openings, and this moment, refrigerant can not enter to the action that defrosts in the evaporimeter 10 via defrosting inflow pipe 16; When evaporimeter 10 has the frosting situation to take place, can cause the refrigerant evaporation hypotony of evaporimeter 10, the pressure citation device (not shown) on this moment evaporimeter 10 can reach signal control system starting first magnetic valve 20, and makes the two or two magnetic valve 2

1 closes, and after then refrigerant just can be directly enters to evaporimeter 10 and defrosts via defrosting inflow pipe 16, flows back to the refrigerant pipeline by defrosting return duct 17 again, is continuously to flow towards expansion valve 15.

In addition, hand switch 19 on return duct 18 set between defrosting inflow pipe 16 and the defrosting return duct 17, then be in order to allow too much refrigerant bypass in the loop, need a large amount of middle temperature refrigerants during right because defrosting, so this hand switch 19 mostly be closed condition.

When refrigerant is designed as defrosting, can be divided into gaseous coolant defrosting and liquid refrigerants defrosting, though it is wherein higher with the efficient of gaseous coolant defrosting, but heat pump with hot-water heating system, gaseous coolant need be used in fully to be made the hot water beginning and meets economic benefit, so come usefulness, be best defrosting mechanism as defrosting to make warm liquid refrigerants in 40 ℃～50 ℃ behind the hot water.

Claims (1)

1, a kind of heat pump of tool defrosting structure is to include evaporimeter, compressor, heat exchanger, reservoir, device for drying and filtering and expansion valve and form a closed circuit, it is characterized in that:

On the refrigerant pipeline between this device for drying and filtering and expansion valve, other has additional defrosting inflow pipe and the defrosting return duct that is connected directly to evaporimeter, between defrosting inflow pipe and defrosting return duct, be provided with the return duct of a tool hand switch, at the return duct arrival end and defrost and be provided with first magnetic valve between the hot inflow pipe arrival end, at the return duct port of export and defrost and be provided with second magnetic valve between the hot inflow pipe arrival end.

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