JPS5880465A - Engine drive type heat pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present l1j1 is an engine-driven system used as a hot water supply cooling system or an air conditioning system. A first heat exchanger that condenses through heat exchange with indoor air, an expansion valve, and a condensed mixture with outside air or heat source water. i
The second heat exchanger for evaporation by heat exchange is connected to an engine-driven heat pump configured to circulate the heat medium across the compressor.

In the above-mentioned engine-driven heat pump, condensation occurs in the second heat exchanger. The outside temperature, which is the source for evaporating the Il medium, is also Fi#1!11
When the source water level decreases significantly, the heat medium dries up and becomes steam or
It is not heated to i'ijk hot steam, but is supplied to the compressor as a mixed steam with cooling capacity, and as a result, before! , %l The latent heat of condensation released by the heat exchanger is reduced rapidly, resulting in a decrease in hot water supply capacity or heating capacity.

In order to compensate for such a decrease in performance, it may be possible to use a reinforcing electric heater in combination, but in this case, there is a drawback that energy consumption is large and cleaning costs are high.

In view of the above-mentioned circumstances, the present invention aims to reduce the decrease in hot water supply capacity or @N capacity that occurs when the temperature of outside air or ill heat source water decreases significantly as part of engine exhaust heat and as a result of engine operation. The first purpose is to effectively utilize the heat retained in the lubricating oil, which becomes hot, to reduce the cost of lubricating oil. It is possible to suppress the deterioration of the build-up and safety during engine start-up, which is caused by the engine start-up, and the operation for this purpose is also completely easy to perform.

In the engine-driven heat pump according to the first invention, in the above-mentioned one, after passing through the expansion valve 11] oa*f+t
- It is characterized by the provision of a heat exchange S that can prevent damage by heat exchange with the lubricating oil stored in the oil sump of the ac engine. Conventionally, heat was naturally radiated to the outside air from the casing, etc., or actively released to the outside through a lubricant radiator. By effectively using the heat medium as an auxiliary heating source for preheating, for example,
Even under conditions where the temperature of the outside air or heat source water has significantly decreased, the condensed heat medium can be turned into pure steam or superheated steam.
[Since silver can be heated rapidly, it is not supplied to the compressor as a silver vapor with cooling capacity as in the past, and it is possible to economically suppress the decline in hot water supply capacity or warm N capacity. It's arrived.

Also, books! The engine-driven type and the one-to-pump according to the 82nd invention are listed in the previous section! In addition to providing an IPII exchange port that can preheat by exchanging the heat medium after the expansion valve with the lubricating oil stored in the oil reservoir of the engine, a lubricating oil temperature detector is also provided. When the oil temperature detected by shall be.

In other words, when the lubricating oil is below the set m degree, such as when the engine is started, the flow of the heat medium to the heat exchanger or the heat source water that exchanges heat therewith is cut off, and the flow of the heat source water is interrupted as the engine is driven. - Only when the lubricant temperature rises above the set temperature,
By carefully configuring the flow of the heat medium or #'1 flk source water to the heat storage section, the lubricating oil is not overcooled by direct heat exchange or indirect heat exchange with the heat medium when the engine is started. , it is possible to suppress the decrease in the fuel cell stability caused by this and to shorten the start-up time of the hot water supply operation or the 11th operation as much as possible. .

Moreover, although it is intended to automatically operate the lotus cutting machine based on the lubricating oil temperature sensor, for example, it is necessary to operate the 11i sentry machine*1 manually. It is possible to reliably achieve the above-mentioned effects without forgetting or erroneous operations.

Hereinafter, the details will be explained based on the embodiments of the present invention.

When constructing a hot water cooling system using an engine-driven type and a single bomb, as shown in the Nt diagram, the heat of the compressor (3) is connected via the engine (1) and the K clutch (2). During the medium circulation path, the pressurized heat medium is condensed by heat exchange with the hot water supply water in the hot water storage tank (4), and the hot water supply water is heated! )
In addition, the second heat exchanger (7) evaporates the condensed heat medium through heat exchange with tap water, underground water, and heat source water that is rumored to be drained, and the condensed heat medium evaporates through heat exchange with indoor 229L. and an eighth heat exchanger (8) that cools the indoor air, and the compressor (3).
The first heat exchanger (6) and the expansion valve (6
), 8th s! The hot water supply cooling cycle is circulated through the exchanger (8), the compressor (3), the 1st percent exchanger (6), the expansion valve (6), the second heat exchanger (7), and the compressor (3). A three-way switching valve (9) that can switch between the hot water supply cycle and the
) has been established.

A hot water supply pipe 0 with a faucet connected to the top of the hot water storage tank (4)
At the same time, a water supply pipe is connected to the lower part of the hot water storage tank (4) with a large delay, and the II & Yukawa water circulation route is connected in communication between the lower and upper parts of the 1ifJ hot water distribution tank (4). Pumps I and 17J circulate water for hot water supply.
The first heat exchanger fi+ mentioned above, the heat exchanger atO that heats and raises the temperature of hot water water by heat exchange with engine cooling water, and heat exchange with engine exhaust heat hot water water! + heat exchanger (2) for heating are interposed in this order from the upper side.

A pump is installed in the circulation path aD between the engine cooling water heat exchange garden and the engine ill quarter shaft.
The cooling water inside the quarter jacket is transferred to the heat exchanger.
At the same time, the cooling water after heat exchange is circulated to the quarter jacket.

Then, forward! , heat source water PII & route equipment on the upstream side of the sg heat exchanger (7) Heat source water is heated and heated by flk exchange with the lubricating oil stored in the oil reservoir (IA) of the engine ill. An exchange part (2) is provided, and the heat medium pipe after passing through the expansion valve (6) is connected to the heat medium pipe (1) after passing through the expansion valve (6). By indirect heat exchange via the 4LL source water, preheating is achieved using the heat retained in the lubricating oil, and the heat exchange of the heat source water supply route is also performed.
A bypass path @ is connected in communication across both sides of the exchange 5cIl11, and the S+ exchange section 1Ill@ is installed to automatically and reversibly cut off the flow of heat source water to (1).

in front! The mechanism port consists of an electromagnetic three-way switching valve.

Figure 2 shows air conditioning and heating using a driven heat pump. , *t
*This shows the case where the first indoor heat exchanger (6 ), two types of IH1t valve ill, (6 and check valve-t (25), external 2nd s+ exchanger (7) is interposed, and pressurized heat medium t-th from the compressor (3) 1 heat exchange 1!+
61, -10,000 expansion valve (6) and check valve (2), g1i
Il exchange! ! (The compressor (3) is circulated through 7+, and the pressurized heat medium is condensed by heat exchange with indoor air in the first heat exchanger (6), and then this heat medium is transferred to the second
A heating cycle in which the heat exchanger (7) evaporates the heating medium by exchanging heat with outside air, and the heating medium from the 17J compressor (3) is heated in the second s! The flow is circulated through the exchanger (7), the other expansion valve (6'), and check valves (25, the compressor 13 passes through the first heat exchanger (j)), and the second heat exchanger (7) ), the pressurized heat medium is condensed by heat exchange with outside air, and then this heat medium is transferred to WJ.
Indoor 9 with l heat exchanger (6)! Four-way switching valve (2) that can switch to a cooling cycle that evaporates through heat exchange with air.
t- provided.

Therefore, during the heating cycle, the heat medium circulation flow path 1241s located in the darkness between the one check valve and the other expansion valve (6) and the second heat exchanger #4! A heat exchange section - for preheating the heat medium after passing through one expansion valve (6) by heat exchange with the lubricating oil stored in the oil droplet (IA) of the engine +1) is connected in communication, and this heat At the bottom of the exchange s circle @ Solenoid three-way switching valve interposed at the connection part (to) t
- When the oil temperature detected by the lubricating oil detector (2) is below the set value, 0fltjli is sent to the t17 heat exchanger.
There is a mechanism t-11f;t for automatically and reversibly connecting the two.

Incidentally, hot water supply river water may be used as the heat source water.

[Brief explanation of the drawing]

The drawings show the upper side of an embodiment of the engine-driven heat pump according to the present invention, FIG. 131 is a piping system diagram, and FIG. 2 is a piping system diagram showing another embodiment. TIJ...Engine, (IA)...Oil sump, (3)...Compressor, +fil e t7
1...IP! lI exchanger, (6)...
Expansion valve, bite...heat exchange part, ■...lubricating oil temperature detector, □□□...mechanism.

Claims (1)

[Claims] ■ Pressurized heat medium t from the compressor (3) driven by the engine (1) - first heat exchanger (6) for condensing by heat exchange with hot water supply water or indoor air, expansion valve (6) Evaporate the condensed heat medium by a exchange with outside air or heat source water 1
In an engine-driven heat pump that circulates and flows the heat medium through the 8g heat exchanger (7) and the compression Ia, the heat medium after passing through the expansion valve (6) is transferred to the 111fIIA of the engine Ill. An engine-driven heat pump characterized in that it is provided with an #Ik exchange section that can preheat by heat exchange with lubricating oil stored in the IA. (2) The engine-driven pump according to item 0, wherein the heat exchange means by the heat exchange S@ is an indirect heat exchange 1d. ■ A special case where the heat exchange method according to heat exchange 5 (2) is direct heat exchange! 11. The engine-driven heat pump described in item (■). ■ Heat exchange of pressurized fIk medium from compressor (3) driven by engine 11) with water for hot water supply or indoor air I)
The first heat exchanger for condensing (b to the expansion valve (-), the first gf/Ik exchanger (1) for evaporating the condensed medium by heat exchange with outside air or heat source water, and the above Circulating heat medium through compressor 1311K flLWIIJ
In the engine-driven heat pump, the expansion valve (preheats the heat medium after passing through the heat exchanger by AT exchange with lubricating oil stored in the oil sump (IA) of the engine (1) Heat exchanger capable of 512Qt
- When the oil temperature detected by the lubricating oil temperature detection 411@ is below the set value, the flow of the heat medium to the heat exchange section (2) or the source water to be heat exchanged with it is automatically controlled in the sections 7 and 4 provided. Easy and reversible! An engine-driven heat pump characterized by being equipped with a disconnection mechanism.