JP2011257120A - Production apparatus for hot water and cold water for drinking water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that in a conventional compressor of chlorofluorocarbon refrigerant specification, since discharge gas temperature does not become high, it cannot be used as refrigerant for hot water manufacturing apparatus.SOLUTION: Compressor discharge gas temperature can be made high by using carbon dioxide refrigerant, and hot water can be manufactured easily as a result. Temperature of each of a heating side heat storage tank and a cooling side heat storage tank can be changed within the range of -5°C to +65°C by changing a ratio of inclusion by using poly ethylene glycol-based heat storage agents having different freezing points for the heating side heat storage tank and the cooling side heat storage tank. Also, heat of solidification of poly ethylene glycol-based heat storage agent is 35 to 40 times that of water.

Description

  Hot water and cold water are produced by using the exhaust heat on the discharge side of the compressor and the residual heat on the suction side of the compressor of the refrigerator manufactured using carbon dioxide as a refrigerant. For hot water production, tap water / heating heat exchanger is installed in the condenser / heat storage tank to pass the tap water through the condenser / heat storage tank to convert the high-temperature / high-pressure refrigerant gas discharged from the compressor into a medium-temperature / high-pressure liquefied gas. Heated to produce hot water. As for cold water, tap water / cooling heat exchanger is installed in the cold water-side heat storage tank using the residual cooling heat source of the refrigerant gas that cannot be exchanged after cooling the refrigerator, and passes the tap water. And cool to produce cold water. By using a polyethylene glycol-based heat storage agent with different freezing points in the heating-side heat storage tank and the cooling-side heat storage tank, the temperature of each heat storage tank is changed in the range of -5 ° C to + 65 ° C by changing the ratio of the contents. Enable use. The heat of solidification of the polyethylene glycol heat storage agent is 35 to 40 times that of water. It is a refrigerator / hot water / cold water production apparatus characterized by the above.

  The refrigeration technology has a history of about 50 years. Refrigerant: As a refrigerant in the early days of refrigeration technology, toxic and flammable refrigerants such as ammonia and methylene chloride were used. Refrigerant after ... It has changed to CFC refrigerant from about 35 years ago. The characteristics of chlorofluorocarbon refrigerants are that they are non-toxic, tasteless, odorless and non-flammable, so they have been developed as the best refrigerant for the refrigeration cycle, and the refrigeration and air conditioning industry has developed dramatically.・ The compressor discharge pressure is low ・ Furthermore, even if mechanical or chemical stress is applied, the physical properties are stable and the refrigerant is stable. Over time, it has risen to the stratosphere, destroying the ozone layer, and has become a very big problem in recent years. Current CFC refrigerants have a smaller ozone depletion potential, but there are still problems with global warming. Carbon dioxide and flammable gas refrigerants are the most promising refrigerants in the future. Characteristics of carbon dioxide refrigerant ... Disadvantages-High compressor discharge gas temperature, high compressor discharge pressure, but using this high discharge temperature makes it possible to produce hot water and heat products. As future compressors, compressors with carbon dioxide and combustible gas specifications will be the tributaries. The structural flow of the compressor has been developed as a single-stage reciprocating compressor-> high-speed multi-cylinder compressor-> rotary and scroll compressors. By incorporating an injection circuit, which is a feature of rotary and scroll compressors, it is possible to control the compressor discharge gas at a high temperature without lowering the efficiency of the compressor, making it possible to produce refrigerators and hot water and cold water production equipment. It has become possible.

Disclosure of development

Problems to be solved by the invention

  Conventional CFC refrigerant compressors cannot be used as refrigerant for hot water production equipment because the discharge gas temperature does not increase. The biggest feature of CFC refrigerants is that the discharge gas temperature does not increase.

  In order to efficiently produce hot water, a compressor capable of keeping the compressor discharge gas temperature high and controlling the discharge gas temperature is required.

  Hot water heat storage and cold water heat storage: To reduce the installation area as much as possible, a heat storage agent that allows easy temperature adjustment is required.

  The tap water supplied to the hot water and cold water production apparatus is stagnant for a certain time, or the water stored in the heat storage tank cannot be used in a large capacity water tank because various germs etc. grow.

  Problems with temperature rise in refrigerator installation room ... A problem with heat dissipation from the refrigerator, which is one of the major factors in Japan's summer cooling load.

Means to solve the problem

  The present invention that has solved this problem makes it possible to increase the discharge gas temperature of the compressor by using hot water production... Carbon dioxide gas refrigerant, and easily produce hot water. The conventional refrigerant reciprocating compressor specification does not have an injection circuit, so the compressor temperature cannot be controlled. Recently, rotary and scroll compressors have been developed, so the compressor has an injection circuit. Equipped with temperature control and refrigeration cycle assembly using carbon dioxide gas refrigerant, making it possible to produce hot water using the discharge gas of the refrigerator. By using polyethylene glycol-based heat storage agents with different freezing points in the heating-side heat storage tank and the cooling-side heat storage tank, the temperature of each heat storage tank is changed to the range of -5 ° C to + 65 ° C by changing the ratio of the contents. Make it possible to change. Further, the heat of solidification of the polyethylene glycol system has 35 to 40 times that of water. In addition, the tap water supplied to the hot water and cold water manufacturing apparatus uses a fin coil type heat exchanger in order to reduce stagnation for a certain time or water storage in the heat storage tank.

The invention's effect

  In conventional CFC refrigerant compressors, the discharge gas temperature does not increase, so it could not be used as a refrigerant for hot water production equipment. However, in order to prevent global warming in recent years, carbon dioxide refrigerant has been used by removing CFCs. The compressor that can be used will be researched and developed and can be used in the near future, the discharge gas temperature can be increased, and hot water can be produced easily.

  Hot water heat storage and cold water heat storage: To reduce the installation area as much as possible, by using a polyethylene glycol-based heat storage agent with different freezing points in the heating-side heat storage tank and the cooling-side heat storage tank, It is possible to change the temperature of each heat storage tank to the range of -5 ° C to + 65 ° C. Also, since the heat of solidification of polyethylene glycol-based heat storage agent has 35 to 40 times that of water, the capacity of the hot water storage tank and the cold water storage tank is about 1/30 that of heat storage using only water. Can be reduced.

  Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS.

  As shown in FIG. 1, the apparatus for producing hot / cold water for drinking water in this embodiment is a compressor. 4 heating tank section. 7-wall heat dissipation type, refrigerator section. 20 cooling tank parts are connected by a refrigerant line.

As shown in FIG. 1, the compressor 1 shows a piping connection port of the compressor.
Discharge port 2. Inlet 23. The injection / suction port 18 is constituted.
Discharge port 2 is a discharge port from the compressor after the low-temperature and low-pressure refrigerant gas is changed into a high-temperature and high-pressure refrigerant gas by the compressor.
Suction port 23. The refrigerant gas that has completely exchanged heat in the cooling-side heat storage tank, passes through the compressor refrigerant / introduction pipe 22, and is sucked into the compressor through the suction port 23.
Compressor injection / suction port: Connection port for direct injection of refrigerant liquid into the compressor rotor to control the compressor temperature

  Injection: The discharge temperature and discharge pressure of a refrigerant compression compressor vary greatly depending on the type of refrigerant and the compression ratio. In particular, in the case of a carbon dioxide refrigerant, the discharge pressure is 10 Mpa or higher and the discharge temperature is 100 ° C. or higher. By controlling this discharge temperature, the heat of condensation can be efficiently recovered from the refrigeration cycle and hot water can be produced. Moreover, an injection circuit is required for temperature control. In the conventional reciprocating compressor, the liquid refrigerant is directly injected to the compressor suction side in order to control the temperature, so that the compression efficiency is extremely lowered and the cooling capacity is greatly reduced. In a rotary type or scroll type compressor that has been developed in recent years, during refrigerant compression, the liquid refrigerant is directly injected into the compression chamber in the compressor to control the temperature, so there is no effect on the compression efficiency and the cooling capacity is low. There is no decline.

  As shown in FIG. 1, the heating tank 4 is integrally constituted by inner and outer stainless steel / foamed urethane heat insulating materials. 3. Heating tank 4. Heating tank / heating tube Tap water / heating heat exchanger 27. Heating tank / heat storage agent 28. Hot water discharge / faucet 29. Tap water inlet 24. Tap water branch pipe 25. It consists of the main parts of the heating tank / tap water introduction pipe 26.

  As shown in FIG. 4, the tap water / heating heat exchanger 27 is made of aluminum fins. A fin-coil heat exchanger with stainless steel pipes that does not stagnate a lot of heated or cooled tap water, minimizes the growth of germs, has a large heat transfer area, and is efficient. Is used.

  Heating tank / heat storage agent 28. Since a polyethylene glycol heat storage agent is used in the heating tank, the heat storage amount is 35 to 40 times that of water. Therefore, the capacity of the heated water tank can be reduced to about 1/30 compared with the heat storage water tank using only water.

  As shown in FIG. 1, the wall heat radiation type refrigerator 7 is integrally constituted by inner and outer stainless steel and urethane foam heat insulating materials. 5. Condenser inlet tube Wall heat radiation type, heat radiation pipe8. Inside refrigerator / cooler 9. Refrigerant liquid / branch pipe10. 10. Cooler / refrigerant liquid pipe Cooler / Dryer 12. Cooler / capillary tube 13. Cooler / introducing pipe 14. It consists of the main parts.

  About the cooling tank / heat storage agent 32. Since a polyethylene glycol heat storage agent is used in the cooling tank, the heat storage amount is 35 to 40 times that of water. Therefore, the capacity of the cooling water tank can be reduced to about 1/30 compared with the heat storage water tank using only water.

  Since the hot / cold water production apparatus for drinking water according to the present invention can be industrially mass-produced, it has industrial applicability.

  It is a refrigerant, tap water, and a piping system diagram.   It is a front view of the refrigerator which added the heating tank and the cooling tank to the general electric refrigerator.   It is a top view of the refrigerator which added the heating tank and the cooling tank to the general electric refrigerator.   It is an external view of a fin coil type cooler.

DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Discharge port, 3 ... Discharge pipe, 4 ... Heating tank, 5 ... Heating tank and heating pipe, 6 ... Condenser introduction pipe, 7 ... Wall heat radiation type / refrigerator, 8 ... Wall heat radiation type / heat radiation Pipes, 9 ... Inside refrigerator / cooler, 10 ... Refrigerant liquid / branch pipe, 11 ... Cooler / refrigerant liquid pipe, 12 ... Cooler / dryer, 13 ... Cooler / capillary tube, 14 ... Cooler / refrigerant Introduction pipe, 15 ... Compressor injection / refrigerant liquid pipe, 16 ... Compressor injection / dryer, 17 ... Compressor injection / capillary tube, 18 ... Compressor injection / inlet, 19 ... Cooling tank cryogenic gas refrigerant / Introduction pipe, 20 ... Cooling tank, 21 ... Cooling tank / cooling pipe, 22 ... Compressor refrigerant / introduction pipe, 23 ... Compressor / suction port, 24 ... Tap water introduction port, 25 ... Tap water branch pipe, 26 ... Heating Tank / tap water introduction pipe, 27 ... Tap water / heat heat exchange 28 ... Heating tank / heat storage agent, 29 ... Hot water discharge / faucet, 30 ... Cooling tank / tap water introduction pipe, 31 ... Tap water / cooling heat exchanger, 32 ... Cooling tank / heat storage agent, 33 ... Cold water discharge / faucet, 34 ... tap water inlet, 35 ... heat exchanger / end plate, 36 ... aluminum heating. Cooling fins, 37 ... stainless steel heating. Cooling pipe, 38 ... tap water outlet pipe

Claims (1)

Hot water and cold water are produced using the exhaust heat on the discharge side of the compressor and the residual heat on the suction side of the compressor of the refrigerator manufactured using carbon dioxide as a refrigerant. About hot water manufacture, in order to make the high temperature / high pressure refrigerant gas discharged from the compressor into a medium temperature / high pressure liquefied gas, heat is exchanged by a condenser / heat storage tank to produce hot water. Moreover, about cold water, after the inside of a refrigerator is cooled, heat exchange cannot be performed, and a cold water is manufactured by exchanging heat with a heat exchanger and heat storage tank using a residual heat source. By using polyethylene glycol-based heat storage agents with different freezing points in the heating-side heat storage tank and the cooling-side heat storage tank, the temperature of each heat storage tank is changed to the range of -5 ° C to + 65 ° C by changing the ratio of the contents. Make it possible to change. The heat of solidification of the polyethylene glycol heat storage agent has 35 to 40 times that of water. Refrigerator combined with hot water and cold water production equipment

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